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Kus T, Isbilen E, Aktas G, Arak H. 326P The predictive value of vitamin D follow-up and replacement on recurrence in patients with colorectal cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Isbilen E, Kus T, Cinkir HY, Aktas G, Buyukbebeci A. 174P Better survival associated with successful vitamin D supplementation in non-metastatic breast cancer survivors. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Epifanovsky E, Gilbert ATB, Feng X, Lee J, Mao Y, Mardirossian N, Pokhilko P, White AF, Coons MP, Dempwolff AL, Gan Z, Hait D, Horn PR, Jacobson LD, Kaliman I, Kussmann J, Lange AW, Lao KU, Levine DS, Liu J, McKenzie SC, Morrison AF, Nanda KD, Plasser F, Rehn DR, Vidal ML, You ZQ, Zhu Y, Alam B, Albrecht BJ, Aldossary A, Alguire E, Andersen JH, Athavale V, Barton D, Begam K, Behn A, Bellonzi N, Bernard YA, Berquist EJ, Burton HGA, Carreras A, Carter-Fenk K, Chakraborty R, Chien AD, Closser KD, Cofer-Shabica V, Dasgupta S, de Wergifosse M, Deng J, Diedenhofen M, Do H, Ehlert S, Fang PT, Fatehi S, Feng Q, Friedhoff T, Gayvert J, Ge Q, Gidofalvi G, Goldey M, Gomes J, González-Espinoza CE, Gulania S, Gunina AO, Hanson-Heine MWD, Harbach PHP, Hauser A, Herbst MF, Hernández Vera M, Hodecker M, Holden ZC, Houck S, Huang X, Hui K, Huynh BC, Ivanov M, Jász Á, Ji H, Jiang H, Kaduk B, Kähler S, Khistyaev K, Kim J, Kis G, Klunzinger P, Koczor-Benda Z, Koh JH, Kosenkov D, Koulias L, Kowalczyk T, Krauter CM, Kue K, Kunitsa A, Kus T, Ladjánszki I, Landau A, Lawler KV, Lefrancois D, Lehtola S, Li RR, Li YP, Liang J, Liebenthal M, Lin HH, Lin YS, Liu F, Liu KY, Loipersberger M, Luenser A, Manjanath A, Manohar P, Mansoor E, Manzer SF, Mao SP, Marenich AV, Markovich T, Mason S, Maurer SA, McLaughlin PF, Menger MFSJ, Mewes JM, Mewes SA, Morgante P, Mullinax JW, Oosterbaan KJ, Paran G, Paul AC, Paul SK, Pavošević F, Pei Z, Prager S, Proynov EI, Rák Á, Ramos-Cordoba E, Rana B, Rask AE, Rettig A, Richard RM, Rob F, Rossomme E, Scheele T, Scheurer M, Schneider M, Sergueev N, Sharada SM, Skomorowski W, Small DW, Stein CJ, Su YC, Sundstrom EJ, Tao Z, Thirman J, Tornai GJ, Tsuchimochi T, Tubman NM, Veccham SP, Vydrov O, Wenzel J, Witte J, Yamada A, Yao K, Yeganeh S, Yost SR, Zech A, Zhang IY, Zhang X, Zhang Y, Zuev D, Aspuru-Guzik A, Bell AT, Besley NA, Bravaya KB, Brooks BR, Casanova D, Chai JD, Coriani S, Cramer CJ, Cserey G, DePrince AE, DiStasio RA, Dreuw A, Dunietz BD, Furlani TR, Goddard WA, Hammes-Schiffer S, Head-Gordon T, Hehre WJ, Hsu CP, Jagau TC, Jung Y, Klamt A, Kong J, Lambrecht DS, Liang W, Mayhall NJ, McCurdy CW, Neaton JB, Ochsenfeld C, Parkhill JA, Peverati R, Rassolov VA, Shao Y, Slipchenko LV, Stauch T, Steele RP, Subotnik JE, Thom AJW, Tkatchenko A, Truhlar DG, Van Voorhis T, Wesolowski TA, Whaley KB, Woodcock HL, Zimmerman PM, Faraji S, Gill PMW, Head-Gordon M, Herbert JM, Krylov AI. Software for the frontiers of quantum chemistry: An overview of developments in the Q-Chem 5 package. J Chem Phys 2021; 155:084801. [PMID: 34470363 PMCID: PMC9984241 DOI: 10.1063/5.0055522] [Citation(s) in RCA: 412] [Impact Index Per Article: 137.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
This article summarizes technical advances contained in the fifth major release of the Q-Chem quantum chemistry program package, covering developments since 2015. A comprehensive library of exchange-correlation functionals, along with a suite of correlated many-body methods, continues to be a hallmark of the Q-Chem software. The many-body methods include novel variants of both coupled-cluster and configuration-interaction approaches along with methods based on the algebraic diagrammatic construction and variational reduced density-matrix methods. Methods highlighted in Q-Chem 5 include a suite of tools for modeling core-level spectroscopy, methods for describing metastable resonances, methods for computing vibronic spectra, the nuclear-electronic orbital method, and several different energy decomposition analysis techniques. High-performance capabilities including multithreaded parallelism and support for calculations on graphics processing units are described. Q-Chem boasts a community of well over 100 active academic developers, and the continuing evolution of the software is supported by an "open teamware" model and an increasingly modular design.
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Affiliation(s)
- Evgeny Epifanovsky
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | | | | | - Joonho Lee
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Yuezhi Mao
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | - Pavel Pokhilko
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Alec F. White
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Marc P. Coons
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Adrian L. Dempwolff
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Zhengting Gan
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Diptarka Hait
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Paul R. Horn
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Leif D. Jacobson
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | | | - Jörg Kussmann
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - Adrian W. Lange
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Ka Un Lao
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Daniel S. Levine
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | - Simon C. McKenzie
- Research School of Chemistry, Australian National University, Canberra, Australia
| | | | - Kaushik D. Nanda
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | | | - Dirk R. Rehn
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Marta L. Vidal
- Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, DK-2800 Kgs Lyngby, Denmark
| | | | - Ying Zhu
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Bushra Alam
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Benjamin J. Albrecht
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | | | - Ethan Alguire
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Josefine H. Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, DK-2800 Kgs Lyngby, Denmark
| | - Vishikh Athavale
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Dennis Barton
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg, Luxembourg
| | - Khadiza Begam
- Department of Physics, Kent State University, Kent, Ohio 44242, USA
| | - Andrew Behn
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Nicole Bellonzi
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Yves A. Bernard
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | | | - Hugh G. A. Burton
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - Abel Carreras
- Donostia International Physics Center, 20080 Donostia, Euskadi, Spain
| | - Kevin Carter-Fenk
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | | | - Alan D. Chien
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | | | - Vale Cofer-Shabica
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Saswata Dasgupta
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Marc de Wergifosse
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Jia Deng
- Research School of Chemistry, Australian National University, Canberra, Australia
| | | | - Hainam Do
- School of Chemistry, University of Nottingham, Nottingham, United Kingdom
| | - Sebastian Ehlert
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Beringstr. 4, 53115 Bonn, Germany
| | - Po-Tung Fang
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | | | - Qingguo Feng
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44240, USA
| | - Triet Friedhoff
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - James Gayvert
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA
| | - Qinghui Ge
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Gergely Gidofalvi
- Department of Chemistry and Biochemistry, Gonzaga University, Spokane, Washington 99258, USA
| | - Matthew Goldey
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Joe Gomes
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | - Sahil Gulania
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Anastasia O. Gunina
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | | | - Phillip H. P. Harbach
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Andreas Hauser
- Institute of Experimental Physics, Graz University of Technology, Graz, Austria
| | | | - Mario Hernández Vera
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - Manuel Hodecker
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Zachary C. Holden
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Shannon Houck
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Xunkun Huang
- Department of Chemistry, Xiamen University, Xiamen 361005, China
| | - Kerwin Hui
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Bang C. Huynh
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - Maxim Ivanov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Ádám Jász
- Stream Novation Ltd., Práter utca 50/a, H-1083 Budapest, Hungary
| | - Hyunjun Ji
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hanjie Jiang
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Benjamin Kaduk
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Sven Kähler
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Kirill Khistyaev
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Jaehoon Kim
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Gergely Kis
- Stream Novation Ltd., Práter utca 50/a, H-1083 Budapest, Hungary
| | | | - Zsuzsanna Koczor-Benda
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - Joong Hoon Koh
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Dimitri Kosenkov
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Laura Koulias
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | | | - Caroline M. Krauter
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Karl Kue
- Institute of Chemistry, Academia Sinica, 128, Academia Road Section 2, Nangang District, Taipei 11529, Taiwan
| | - Alexander Kunitsa
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA
| | - Thomas Kus
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | | | - Arie Landau
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Keith V. Lawler
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Daniel Lefrancois
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | | | - Run R. Li
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Yi-Pei Li
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Jiashu Liang
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Marcus Liebenthal
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Hung-Hsuan Lin
- Institute of Chemistry, Academia Sinica, 128, Academia Road Section 2, Nangang District, Taipei 11529, Taiwan
| | - You-Sheng Lin
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Fenglai Liu
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | | | | | - Arne Luenser
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - Aaditya Manjanath
- Institute of Chemistry, Academia Sinica, 128, Academia Road Section 2, Nangang District, Taipei 11529, Taiwan
| | - Prashant Manohar
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Erum Mansoor
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Sam F. Manzer
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Shan-Ping Mao
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | | | - Thomas Markovich
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Stephen Mason
- School of Chemistry, University of Nottingham, Nottingham, United Kingdom
| | - Simon A. Maurer
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - Peter F. McLaughlin
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | | | - Jan-Michael Mewes
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Stefanie A. Mewes
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Pierpaolo Morgante
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, USA
| | - J. Wayne Mullinax
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, USA
| | | | | | - Alexander C. Paul
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Suranjan K. Paul
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Fabijan Pavošević
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA
| | - Zheng Pei
- School of Electrical and Computer Engineering, University of Oklahoma, Norman, Oklahoma 73019, USA
| | - Stefan Prager
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Emil I. Proynov
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Ádám Rák
- Stream Novation Ltd., Práter utca 50/a, H-1083 Budapest, Hungary
| | - Eloy Ramos-Cordoba
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Bhaskar Rana
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Alan E. Rask
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Adam Rettig
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Ryan M. Richard
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Fazle Rob
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Elliot Rossomme
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Tarek Scheele
- Institute for Physical and Theoretical Chemistry, University of Bremen, Bremen, Germany
| | - Maximilian Scheurer
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Matthias Schneider
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Nickolai Sergueev
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44240, USA
| | - Shaama M. Sharada
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Wojciech Skomorowski
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - David W. Small
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Christopher J. Stein
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Yu-Chuan Su
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan
| | - Eric J. Sundstrom
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Zhen Tao
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, USA
| | - Jonathan Thirman
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Gábor J. Tornai
- Stream Novation Ltd., Práter utca 50/a, H-1083 Budapest, Hungary
| | - Takashi Tsuchimochi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Norm M. Tubman
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | - Oleg Vydrov
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Jan Wenzel
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Jon Witte
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Atsushi Yamada
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44240, USA
| | - Kun Yao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Sina Yeganeh
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Shane R. Yost
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Alexander Zech
- Department of Physical Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - Igor Ying Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Xing Zhang
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Yu Zhang
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Dmitry Zuev
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Alán Aspuru-Guzik
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Alexis T. Bell
- Department of Chemical Engineering, University of California, Berkeley, California 94720, USA
| | - Nicholas A. Besley
- School of Chemistry, University of Nottingham, Nottingham, United Kingdom
| | - Ksenia B. Bravaya
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA
| | - Bernard R. Brooks
- Laboratory of Computational Biophysics, National Institute of Health, Bethesda, Maryland 20892, USA
| | - David Casanova
- Donostia International Physics Center, 20080 Donostia, Euskadi, Spain
| | | | - Sonia Coriani
- Department of Chemistry, Technical University of Denmark, Kemitorvet Bldg. 207, DK-2800 Kgs Lyngby, Denmark
| | | | | | - A. Eugene DePrince
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Robert A. DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Barry D. Dunietz
- Department of Chemistry and Biochemistry, Kent State University, Kent, Ohio 44240, USA
| | - Thomas R. Furlani
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - William A. Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, USA
| | | | - Teresa Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | | | | | - Yousung Jung
- Graduate School of Energy, Environment, Water and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Andreas Klamt
- COSMOlogic GmbH & Co. KG, Imbacher Weg 46, D-51379 Leverkusen, Germany
| | - Jing Kong
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Daniel S. Lambrecht
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | | | | | - C. William McCurdy
- Department of Chemistry, University of California, Davis, California 95616, USA
| | - Jeffrey B. Neaton
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - Christian Ochsenfeld
- Department of Chemistry, Ludwig Maximilian University, Butenandtstr. 7, D-81377 München, Germany
| | - John A. Parkhill
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Roberto Peverati
- Department of Chemistry, Florida Institute of Technology, Melbourne, Florida 32901, USA
| | - Vitaly A. Rassolov
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | | | | | | | - Ryan P. Steele
- Department of Chemistry and Henry Eyring Center for Theoretical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Joseph E. Subotnik
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Alex J. W. Thom
- Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
| | - Alexandre Tkatchenko
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg, Luxembourg
| | - Donald G. Truhlar
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Troy Van Voorhis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Tomasz A. Wesolowski
- Department of Physical Chemistry, University of Geneva, 30, Quai Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
| | - K. Birgitta Whaley
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - H. Lee Woodcock
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, USA
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Shirin Faraji
- Zernike Institute for Advanced Materials, University of Groningen, 9774AG Groningen, The Netherlands
| | | | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - John M. Herbert
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, USA
| | - Anna I. Krylov
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA,Author to whom correspondence should be addressed:
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Tewfik E, Kus T, Vinet A, Stürmer M, Becker G, Laroussi L. EASILY MEASURED MARKERS OF SYNCOPE SEVERITY PREDICT VASOVAGAL SYNCOPE RECURRENCE DESPITE CLOSED-LOOP STIMULATION. Can J Cardiol 2020. [DOI: 10.1016/j.cjca.2020.07.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Kus T, Kose F, Aktas G, Yalcintas U, Sedef A, Cinkir H, Dirikoc M, Akkus G, Ozdemir N. P-110 Prediction of peritoneal recurrence in patients with gastric cancer: A multicenter study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Tewfik E, Kus T, Laroussi L, Sturmer M, Becker G, Vinet A. INCIDENCE AND CHARACTERISTICS OF SLEEP-RELATED SYNCOPE IN PATIENTS WITH VASOVAGAL SYNCOPE. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kus T, Berkovitz A, Dubuc V, Sturmer M, Becker G, Vinet A, Mahaddine O, Nadeau R. EXPEDIENT DETECTION OF PAROXYSMAL ATRIAL FIBRILLATION WITH PROLONGED EARLY MONITORING POST CRYPTOGENIC ISCHEMIC CEREBROVASCULAR EVENT. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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8
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Kiwan C, AlTurki A, Greiss I, Kus T, Montigny M, Ayala-Paredes F, Sarrazin J, Garcia MB, Breton R, O'Hara G, Sami M, Brulotte S, Dion D, Houde G, Sandrin F, Palaic M, Chow C, Boudreault C, Essebag V, Huynh T. THE IMPACT OF KNOWLEDGE TRANSLATION AND INTEGRATED CARDIOVASCULAR CARE ON EMERGENCY ROOM VISITS OF PATIENTS WITH ATRIAL FIBRILLATION: INSIGHTS FROM THE INTEGRATED-FACILITER PROGRAM. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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9
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Raj SR, Guzman JC, Kus T, Araya-Paredes FA, Angihan J, Lei L, Bennett G, Maxey C, Sheldon RS. P4832Norepinephrine transporter inhibition prevents tilt-induced vasovagal syncope: a randomized, placebo controlled trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S R Raj
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
| | - J C Guzman
- McMaster University, Medicine, Hamilton, Canada
| | - T Kus
- Hospital du Sacre-Coeur, Cardiologie, Montreal, Canada
| | - F A Araya-Paredes
- University Hospital of Sherbrooke (CHUS), Cardiologie, Sherbrooke, Canada
| | - J Angihan
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
| | - L Lei
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
| | - G Bennett
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
| | - C Maxey
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
| | - R S Sheldon
- Libin Cardiovascular Institute of Alberta, Cardiac Sciences, Calgary, Canada
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10
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Kus T, Aktas G, Kalender M, Sevinc A, Camci C. P53 and ERCC1 gene polymorphisms can predict the recurence risk of breast cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw364.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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11
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Kalender M, Bulbul F, Aktas G, Kus T, Okyar B, Balakan O, Camci C. Awareness of cancer diagnosis in Turkish patients can increase anxiety and depression: is it true? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw390.72] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sheldon R, Raj SR, Rose MS, Morillo CA, Krahn AD, Medina E, Talajic M, Kus T, Seifer CM, Lelonek M, Klingenheben T, Parkash R, Ritchie D, McRae M, Sheldon R, Rose S, Ritchie D, McCrae M, Morillo C, Malcolm V, Krahn A, Spindler B, Medina E, Talajic M, Kus T, Langlois A, Lelonek M, Raj S, Seifer C, Gardner M, Romeo M, Poirier P, Simpson C, Abdollah H, Reynolds J, Dorian P, Birnie D, Giuffre M, Gilligan D, Benditt D, Sheldon R, Raj S, Rose M, Krahn A, Morillo C, Medina E. Fludrocortisone for the Prevention of Vasovagal Syncope. J Am Coll Cardiol 2016; 68:1-9. [DOI: 10.1016/j.jacc.2016.04.030] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 10/21/2022]
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13
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Ta V, Montigny M, Greiss I, Dion D, Breton R, Barrero M, Essebag V, Sarrazin J, Kus T, Ayala-Paredes F, Brulotte S, Sandrin F, Palaic M, Houde G, O'Hara G, Philippon F, Boudreault C, Huynh T. MANAGEMENT OF PATIENTS WITH ATRIAL FIBRILLATION BY FAMILY MEDICINE GROUPS IN QUÉBEC: INSIGHTS FROM THE I-FACILITER STUDY. Can J Cardiol 2015. [DOI: 10.1016/j.cjca.2015.07.509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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14
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Jacquemet V, Cassani González R, Sturmer M, Dubé B, Sharestan J, Vinet A, Mahiddine O, LeBlanc A, Becker G, Kus T, Nadeau R. QT interval measurement and correction in patients with atrial flutter: a pilot study. J Electrocardiol 2014; 47:228-35. [DOI: 10.1016/j.jelectrocard.2013.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Indexed: 11/17/2022]
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González RC, Dubé B, Sharestan J, Mahiddine O, Vinet A, Nadeau R, LeBlanc A, Sturmer M, Becker G, Kus T, Jacquemet V. Consistency of QTc measurements in atrial flutter patients before and after catheter ablation. J Electrocardiol 2013. [DOI: 10.1016/j.jelectrocard.2013.09.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bibas L, Roy K, Sant'Anna R, Vinet A, Jacquemet V, Dubé B, Becker G, Kus T, Nadeau R, Leblanc R, Sturmer M. The Effect of Ventricular Stimulation on the QT Interval in Patients With Pacemakers. Can J Cardiol 2013. [DOI: 10.1016/j.cjca.2013.07.308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Jacquemet V, Cassani Gonzalez R, Dubé B, Vinet A, Le Blanc A, Sturmer M, Becker G, Kus T, Nadeau R. Relevance of individualized qt interval correction in subjects with large heart rate fluctuations. J Electrocardiol 2013. [DOI: 10.1016/j.jelectrocard.2013.05.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sturmer M, Sharestan J, Dube B, Jacquemet V, Vinet A, Kus T, Becker G, Leblanc A, Nadeau R. 608 Atrial Flutter Doesn't Cause Changes in QT Interval. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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19
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Sant'Anna R, Becker G, Kus T, Hadjis T, Essebag V, Sturmer M. 597 Cardiac Biomarkers Levels in Patients Undergoing Permanent Pacemaker Implantation for Non-Paroxysmal Atrioventricular Block. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kus T, Nitzsché R, Becker G, Essebag V, Hadjis T, Sturmer M, Langlois A. 600 Safer Pacing Mode Significantly Prevents V Pacing as Compared to DDD With Long AV Delays or AV Delay Hysteresis. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fliser D, Shilo V, Covic A, Besarab A, Provenzano R, Duliege AM, Chen M, Tong S, Francisco C, Gao HY, Polu K, De Francisco AL, Macdougall I, Macdougall I, Schiller B, Locatelli F, Wiecek A, Francisco C, Tang H, Tong S, Chen M, Duliege AM, Polu K, Mayo M, Covic A, Macdougall I, Macdougall I, Casadevall N, Stead R, Taal M, Faller B, Karras A, Chen M, Tong S, Duliege AM, Rowell R, Polu K, Eckardt KU, Locatelli F, Dusilova Sulkova S, Arnaud S, Bruno P, Arnaud G, Dorina V, Eric A, Gerard M, Cases A, Portoles JM, Calls J, Martinez Castelao A, Sanchez-Guisande D, Segarra A, Tsubakihara Y, Tsubakihara Y, Saito A, Saito A, Saito A, Tsubakihara Y, Martinez-Castelao A, Martinez-Castelao A, Cases A, Fort J, Bonal J, Fulladosa X, Galceran JM, Torregrosa V, Coll E, Minutolo R, Cozzolino M, DI Iorio B, Polito P, Santoro D, Manenti F, Nappi F, Feriozzi S, Conte G, De Nicola L, Mikhail A, Provenzano R, Schiller B, Besarab A, Francisco C, Gao HY, Daley R, Tong S, Mayo M, Yang A, Polu K, Macdougall I, Wiecek A, Schiller B, Canaud B, Locatelli F, Yang A, Chen M, Polu K, Francisco C, Gao HY, Tong S, Duliege AM, Provenzano R, Locatelli F, Locatelli F, Provenzano R, Besarab A, Rath T, Yang A, Mayo M, Francisco C, Macdougall I, Bartnicki P, Baj Z, Majewska E, Rysz J, Fievet P, Assem M, Brazier F, Xu X, Soltani ON, Demontis R, Barsan L, Stancu S, Stancu S, Stanciu A, Capusa C, Petrescu L, Zugravu A, Mircescu G, Malyszko JM, Levin-Iaina N, Malyszko J, Glowinska I, Koc-Zorawska E, Slotki I, Mysliwiec M, Mircescu G, Mircescu G, Capusa C, Stancu S, Barsan L, Grabowski D, Blaga V, Dumitru D, Pchelin I, Shishkin A, Kus T, Usalan C, Tiryaki O, Chin HJ, Chae DW, Kim S, Bertram H, Keller F, Rumjon A, Wood C, Wilson P, Khakoo S, Chai MO, Macdougall IC, Nuria GF, Maria Asuncion F, Jose Maria MG, Carmen C, Paloma Leticia MM, Francisco Javier L, Moniek DG, De Goeij M, Yvette M, Diana G, Friedo D, Nynke H, Lezaic V, Miljkovic B, Petkovic N, Maric I, Vucicevic K, Simic Ogrizovic S, Djukanovic L, Cases A, Martinez-Castelao A, Fort A, Bonal J, Fulladosa X, Galceran JM, Torregrosa V, Coll E, DI Giulio S, DI Giulio S, Galle J, Kiss I, Herlitz H, Wirnsberger G, Claes K, Suranyi M, Guerin A, Winearls C, Addison J, D'souza M, Froissart M, Garrido P, Garrido P, Teixeira M, Costa E, Rodrigues-Santos P, Parada B, Belo L, Alves R, Teixeira F, Santos-Silva A, Reis F, Winearls C, Winearls C, DI Giulio S, Galle J, Kiss I, Herlitz H, Wirnsberger G, Claes K, Suranyi M, Guerin A, Addison J, D'souza M, Fouqueray B, Floris M, Conti M, Cao R, Pili G, Melis P, Matta V, Murgia E, Atzeni A, Binda V, Angioi A, Peri M, Pani A, Besarab A, Belo D, Diamond S, Martin E, Sun C, Lee T, Saikali K, Franco M, Leong R, Neff T, Yu KHP, Tiranathanagul K, Praditpornsilpa K, Katavetin P, Kanjanabuch T, Avihingsanon Y, Tungsanga K, Eiam-Ong S, Macdougall IC, Casadevall N, Percheson P, Potamianou A, Foucher A, Fife D, Vercammen E. Renal anaemia - CKD 1-5. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Krahn AD, Morillo CA, Kus T, Manns B, Rose S, Brignole M, Sheldon RS. Empiric pacemaker compared with a monitoring strategy in patients with syncope and bifascicular conduction block--rationale and design of the Syncope: Pacing or Recording in ThE Later Years (SPRITELY) study. Europace 2012; 14:1044-8. [DOI: 10.1093/europace/eus005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Côté M, D'Antono B, Sturmer M, Becker G, Essebag V, Hadjis T, Gizicki E, St. Gelais J, Sas G, Kus T. 552 Patient distress following fidelis defibrillator lead advisory. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
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Sheldon R, Morillo C, Krahn A, Medina E, Talajic M, Kus T, Lelonek M, Ritchie D, McRae M, Rose S. 903 A randomized clinical trial of fludrocortisone for the prevention of vasovagal syncope (POST2). Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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25
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Raj S, McRae M, Keller N, Ritchie D, Krahn A, Morillo C, Kus T, Talajic M, Sheldon R. 557 Gynecological abnormalities and varying lightheadedness through the menstrual cycle in neurally mediated syncope: A post2 substudy. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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26
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Roy K, Vinet A, Nadeau R, Kus T, Becker G, Jacquemet V, Leblanc A, Dube B, Sturmer M. 567 QT prolongation during ventricular stimulation is entirely dependent on QRS widening. Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Mitro P, Kirsch P, Gajek J, Zysko D, Mazurek W, Ruiz GA, Chirife R, Tentori C, Nogues M, Grancelli H, Nur-Mammadova G, Mustafaev I, Gajek J, Zysko D, Mazurek W, Sredniawa B, Cebula S, Musialik-Lydka A, Kowalczyk J, Sliwinska A, Sedkowska A, Wozniak A, Kalarus Z, Pietrucha AZ, Wojewodka-Zak E, Bzukala I, Wnuk M, Mroczek-Czernecka D, Konduracka E, Piwowarska W, Peppes V, Kontomerkos D, Parisi T, Dimopoulos M, Antoniou A, Freitas JP, Santos RM, Boomsma F, Maciel MJ, Iacoviello M, Forleo C, Guida P, Ciccone MM, D'andria V, Sorrentino S, Panunzio M, Favale S, Candeias R, Silva J, Santos A, Marques N, Jesus I, Gomes V, Gajek J, Zysko D, Mazurek W, Olendrzynski LUK, Kramarz EK, Kubik LK, Zysko D, Gajek J, Mazurek W, Tahir T, Rose S, Garratt C, Clarke B, Cooper P, Fitzpatrick A, Petkar S, Fuca G, Dinelli M, Gianfranchi L, Corbucci G, Alboni P, Leiria TLL, Kus T, Godin B, Ayala-Paredes F, Lemieux A, Sturmer ML, Stanczyk A, Gatzoulis K, Karystinos G, Gialernios T, Sotiropoulos H, Sideris S, Dilaveris P, Arsenos P, Stefanadis C, Maggi R, Kohno R, Abe H, Otsuji Y. Poster Session 4: Syncope. Europace 2009. [DOI: 10.1093/europace/euq238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Schwagten B, Schwagten BKR, Szili-Torok T, Rivero-Ayerza M, Thornton A, Van Belle Y, Jordaens L, Leiria TLL, Kus T, Hadjis TA, Essebag V, Sturmer ML, Soubelet E, Krum D, Delavelle A, Varray F, Hare J, Vaillant R, Choudhuri I, Sra J, Vollmann D, Luethje L, Seegers J, Hasenfuss G, Zabel M, Johar S, Jones DG, Lyne JC, Kaba RA, Wong T, Markides V, Clague JR, Ernst S, Hlivak P, Mlcochova H, Peichl P, Cihak R, Wichterle D, Kautzner J. Abstracts: Tools to facilitate ablation procedures. Europace 2009. [DOI: 10.1093/europace/euq197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Richer L, Kus T, Vermeulen M, Vinet A, Ardell J, Cardinal R, Armour J. 70 Neurally induced atrial arrhythmias are eliminated by alpha-adrenergic blockade. Europace 2005. [DOI: 10.1016/eupace/7.supplement_1.15-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- L.P. Richer
- H pital du Sacr -Coeur de Montr al, Research Centeg, Montr al, Canada
| | - T. Kus
- H pital du Sacr -Coeur de Montr al, Centre de Recherche, Montr al, Canada
| | - M. Vermeulen
- H pital du Sacr -Coeur de Montr al, Research Centeg, Montr al, Canada
| | - A. Vinet
- H pital du Sacr -Coeur de Montr al, Research Centeg, Montr al, Canada
| | - J.L. Ardell
- East Tennessee State University, Dept. of Pharmacology, Quillen COM, Johnson City, United States of America
| | - R. Cardinal
- H pital du Sacr -Coeur de Montr al, Research Centeg, Montr al, Canada
| | - J.A. Armour
- H pital du Sacr -Coeur de Montr al, Research Centeg, Montr al, Canada
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Rahme MM, Jalil E, Laflamme M, Kus T. Effect of autonomic neurotransmitters on excitable gap composition in canine atrial flutter. Can J Physiol Pharmacol 2001; 79:13-7. [PMID: 11201496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Atrial arrhythmias are believed to be influenced by autonomic nervous system tone. We evaluated the effects of sympathetic and parasympathetic activation on atrial flutter (AF1) by determining the effects of norepinephrine (NE) and acetylcholine (ACh) on the composition of the excitable gap. A model of reentry around the tricuspid valve was produced in 17 chloralose anesthetized dogs using a Y-shaped lesion in the intercaval area that extended to the right atrial appendage. Excitable gap characteristics were determined during AF1 by scanning diastole with a single premature extrastimulus at progressively shorter coupling intervals to define the reset-response curve. Measurements were made during a constant infusion of NE (15 microg/min) into the right coronary artery and repeated during ACh infusion (2 microg/min) following a 15 min recovery period. The excitable gap (27 +/- 1 ms) was significantly (P < 0.001) increased by NE (34 +/- 1 ms) and ACh (50 +/- 2 ms). The fully excitable portion (7 +/- 1 ms) was also significantly (P < 0.001) increased by NE (17 +/- 1 ms) and ACh (43 +/- 2 ms). We conclude that both neurotransmitters increase the safety margin of full excitability ahead of the wavefront, demonstrating that parasympathetic and sympathetic activation can facilitate the persistence of this refractory atrial arrhythmia.
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Affiliation(s)
- M M Rahme
- Department of Pharmacology, Université de Montréal, Québec, Canada
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Gillis AM, Connolly SJ, Lacombe P, Philippon F, Dubuc M, Kerr CR, Yee R, Rose MS, Newman D, Kavanagh KM, Gardner MJ, Kus T, Wyse DG. Randomized crossover comparison of DDDR versus VDD pacing after atrioventricular junction ablation for prevention of atrial fibrillation. The atrial pacing peri-ablation for paroxysmal atrial fibrillation (PA (3)) study investigators. Circulation 2000; 102:736-41. [PMID: 10942740 DOI: 10.1161/01.cir.102.7.736] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Some clinical data suggest that atrial-based pacing prevents paroxysmal atrial fibrillation (AF). This study tested the hypothesis that DDDR pacing compared with VDD pacing prevents AF after atrioventricular (AV) junction ablation. METHODS AND RESULTS Patients were randomized to DDDR pacing (n=33) or to VDD pacing (n=34) after AV junction ablation and followed every 2 months for 6 months. Patients then crossed over to the alternate pacing mode and were followed for an additional 6 months. Primary analysis included the time to first recurrence of sustained AF (duration >5 minutes), total AF burden, and the development of permanent AF. The time to first episode of AF was similar in the DDDR group (0.37 days, 95% CI 0.1 to 1.3 days) and the VDD pacing group (0.5 days, 95% CI 0.2 to 1.7 days, P=NS). AF burden increased over time in both groups (P<0.01). At the 6-month follow-up, AF burden was 6.93 h/d (95% CI 4. 37 to 10.96 h/d) in the DDDR group and 6.30 h/d (95% CI 3.99 to 9.94 h/d) in the VDD group (P=NS). Twelve (35%) patients in the DDDR group and 11 (32%) patients in the VDD group had permanent AF within 6 months of ablation. Within 1 year of follow-up, 43% of patients had permanent AF. CONCLUSIONS DDDR pacing compared with VDD pacing does not prevent paroxysmal AF over the long term in patients in the absence of antiarrhythmic drug therapy after total AV junction ablation. Many patients have permanent AF within the first year after ablation.
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Affiliation(s)
- A M Gillis
- Division of Cardiology, Foothills Hospital and the University of Calgary, Calgary, Alberta, Canada
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Abstract
Previous studies on atrial flutter (AF) presumed that resetting was due to the prematurity effect (PE) in which the stimulated antegrade wavefront travels in the tail of the AF preexisting wavefront. We studied the collision effect (CE) between the AF and the stimulated retrograde wavefronts, its contribution to resetting, and its relationship to AF termination and how they are affected by the Class IC agent propafenone (PPF). A canine model of AF was created using a Y-shaped lesion in the right atrium in 14 dogs (33 +/- 3 kg). Five atrial bipolar electrodes were positioned around the tricuspid valve. In a subsequent set of 11 dogs, we used 16 bipolar electrodes for recording. AF was induced by burst pacing. Single and multiple stimuli were applied to measure conduction time and reset-response curves (RRCs). This was repeated after the administration of PPF (1 mg/kg loading dose for 10 minutes, followed by 1.8 mg/kg/per hour infusion). Three distinct mechanisms were found to contribute to the RRC: the PE, the CE, and heterogeneity. PPF stabilized the RRC, increased significantly the cycle length (CL), the duration of the effective refractory period, as well as the duration of the excitable gap. However, PPF did not alter the duration of the fully excitable portion. We studied 36 annihilations without and 48 with PPF. Transient fibrillation was found in 75% of the episodes without, compared to 22% with PPF. Other types of termination such as conduction block, CL oscillations, and reversal of activation were found for 25% of the episodes without and 78% with PPF. In many cases, conduction block and CL oscillations were associated with a failure of propagation of the stimulated antegrade wavefront in the region of collision. Termination by reversal of activation suggests that propagation was two dimensional and could not be represented by a one dimensional movement. The average coupling interval (in percent of CL), that induced fibrillation was not significantly different from that at which conduction block occurred. This suggests that transient fibrillation is associated with a weak CE rather than with rapid pacing. The CE is amplified by multiple stimuli and PPF. The incidence of transient fibrillation in AF annihilation diminishes with PPF as the CE becomes more important. This suggests that the evaluation of PE and CE in AF may be an indication of the risk of atrial fibrillation.
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Affiliation(s)
- B Mensour
- Research Center of Sacré-Coeur Hospital, Université de Montréal, Québec, Canada
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Roy D, Talajic M, Dorian P, Connolly S, Eisenberg MJ, Green M, Kus T, Lambert J, Dubuc M, Gagné P, Nattel S, Thibault B. Amiodarone to prevent recurrence of atrial fibrillation. Canadian Trial of Atrial Fibrillation Investigators. N Engl J Med 2000; 342:913-20. [PMID: 10738049 DOI: 10.1056/nejm200003303421302] [Citation(s) in RCA: 666] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND The restoration and maintenance of sinus rhythm is a desirable goal in patients with atrial fibrillation, because the prevention of recurrences can improve cardiac function and relieve symptoms. Uncontrolled studies have suggested that amiodarone in low doses may be more effective and safer than other agents in preventing recurrence, but this agent has not been tested in a large, randomized trial. METHODS We undertook a prospective, multicenter trial to test the hypothesis that low doses of amiodarone would be more efficacious in preventing recurrent atrial fibrillation than therapy with sotalol or propafenone. We randomly assigned patients who had had at least one episode of atrial fibrillation within the previous six months to amiodarone or to sotalol or propafenone, given in an open-label fashion. The patients in the group assigned to sotalol or propafenone underwent a second randomization to determine whether they would receive sotalol or propafenone first; if the first drug was unsuccessful the second agent was prescribed. Loading doses of the drugs were administered and electrical cardioversion was performed (if necessary) within 21 days after randomization for all patients in both groups. The follow-up period began 21 days after randomization. The primary end point was the length of time to a first recurrence of atrial fibrillation. RESULTS Of the 403 patients in the study, 201 were assigned to amiodarone and 202 to either sotalol (101 patients) or propafenone (101 patients). After a mean of 16 months of follow-up, 71 of the patients who were assigned to amiodarone (35 percent) and 127 of those who were assigned to sotalol or propafenone (63 percent) had a recurrence of atrial fibrillation (P<0.001). Adverse events requiring the discontinuation of drug therapy occurred in 18 percent of the patients receiving amiodarone, as compared with 11 percent of those treated with sotalol or propafenone (P=0.06). CONCLUSIONS Amiodarone is more effective than sotalol or propafenone for the prevention of recurrences of atrial fibrillation.
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Affiliation(s)
- D Roy
- Montreal Heart Institute, QC, Canada.
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Abstract
The objectives of this study were: (1) to evaluate quantitatively the spatial resolution of pacemapping; and (2) to assess the predictive value and role of pacemapping for the catheter ablation of overt APs. Sixty-three unipolar leads were used instead of the standard 12-lead ECG to acquire more information and assess the intrinsic accuracy of pacemapping. Spatial resolution was evaluated in 19 patients for whom data were recorded during bipolar ventricular pacing near the AV ring using the three electrode pairs of a quadripolar ablation catheter with a 5-mm interelectrode spacing. The predictive value was assessed in 27 patients with overt APs who underwent RF ablation; their data were recorded during pacing at the site of successful ablation and at one or two sites where RF energy delivery was ineffective. Data from different beats were compared visually by using body surface potential maps and quantitatively by computing average correlation coefficients (r). Reproducibility was high for paced beats (r = 0.98 +/- 0.02). Displacements of 5 mm of the pacing site could be detected with a sensitivity of 90% and a specificity of 87%. Correlation between pacing at successful ablation sites and preexcited sinus rhythm was low (r = 0.79 +/- 0.11) and the ablation outcome could be predicted with a negative prediction accuracy of 87% and a positive prediction accuracy of 49%. Despite an excellent spatial resolution, pacemapping is of limited value for the identification of successful AP ablation sites, probably because APs can be interrupted at some distance from their ventricular insertion point.
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Affiliation(s)
- F Molin
- Research Center, Hôpital du Sacré-Coeur de Montréal, Québec, Canada.
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Jalil E, Laflamme M, Kus T. Effects of procainamide on the excitable gap composition in a canine model of atrial flutter. Can J Physiol Pharmacol 1997. [DOI: 10.1139/y96-151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Jalil E, Laflamme M, Kus T. Effects of procainamide on the excitable gap composition in a canine model of atrial flutter. Can J Physiol Pharmacol 1997; 75:1-8. [PMID: 9101058 DOI: 10.1139/cjpp-75-1-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The effects of increasing concentrations of procainamide on the composition of the excitable gap were determined in a canine model of atrial flutter. Using the model of a Y-shaped lesion in the right atrium, reentry around the tricuspid valve was induced by burst pacing in 10 open-chest chloralose-anesthetized dogs. Diastole was scanned with a single premature stimulus and the relationship between the coupling interval of the premature beat and the return cycle length (CL) determined a reset-response curve that described the excitable gap. This was repeated up to the maximum flutter CL while infusing procainamide (30 mg/kg) over 1 h. Procainamide progressively prolonged the flutter CL from 131 +/- 21 (+/-SD) to 188 +/- 46 ms (p < 0.01) and the effective refractory period from 96 +/- 19 to 149 +/- 47 ms (p < 0.01). At peak plasma levels of 77 +/- 33 mumol/L the drug terminated flutter only in two dogs. Neither the duration (35 +/- 10 to 39 +/- 13 ms) nor the composition of the excitable gap changed on drug. A fully excitable portion (7 +/- 3 ms or 20 +/- 11% of the excitable gap) persisted on procainamide (7 +/- 3 ms or 19 +/- 9% of the excitable gap). It was concluded that procainamide prolongs the atrial flutter CL and the effective refractory period but does not change either the duration or composition of the excitable gap even at plasma concentrations that significantly exceed those recommended in man.
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Affiliation(s)
- E Jalil
- Research Center, Hôpital du Sacré Coeur de Montréal, QC, Canada
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Vinet A, Cardinal R, LeFranc P, Hélie F, Rocque P, Kus T, Pagé P. Cycle length dynamics and spatial stability at the onset of postinfarction monomorphic ventricular tachycardias induced in patients and canine preparations. Circulation 1996; 93:1845-59. [PMID: 8635264 DOI: 10.1161/01.cir.93.10.1845] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The aim of this study was to determine whether cycle length (CL) variations at the onset of monomorphic ventricular tachycardias follow distinctive patterns. METHODS AND RESULTS We retrospectively analyzed 59 monomorphic ventricular tachycardias induced in 40 patients in whom intraoperative mapping was performed with 63 epicardial and 64 endocardial electrograms recorded simultaneously. Activation times and CL were determined at each electrode site over several beats (36+/-10 beats, mean+/-SD) starting with the first after programmed stimulation. In the majority of the tachycardias, CL variations were accounted for by fitting to an exponential function: CL=CLs+Ae-b/tau, where CLs is the stable CL, b is beat number, tau is the time constant (in beat number), and A is the magnitude of CL relaxation. A decelerating trend (with reference to rate) (negative A) accounted for 21 tachycardias, an accelerating trend in rate (positive A) accounted for 12 tachycardias, and 4 others displayed a double dynamic behavior, with an initial acceleration followed by a decelerating trend in rate. Among the ventricular tachycardias that were not fitted to exponential models, 12 showed a constant trend and 10 others showed irregular CL fluctuations. The monomorphic character of the tachycardias was established by principal-component analysis, which also indicated that CL dynamics associated with the accelerating and decelerating trends may be related to shortening and prolongation of activation times, respectively, occurring in equal proportion at all recording sites. In canine preparations in which reentry circuits could be mapped with high resolution, CL showed an accelerating trend in rate when circus movement of excitation occurred around a transmural scar in muscle generating unipolar electrograms with relatively high -dV/dtmax, and a decelerating trend in rate occurred when functional reentry occurred in muscle generating unipolar electrograms with depressed -dV/dtmax. CONCLUSIONS Beat-to-beat CL variations may occur at the onset of sustained monomorphic ventricular tachycardia as a result of uniform acceleration or deceleration of activation times while the overall activation pattern remains constant. The associated initial trends in the rate of sustained monomorphic ventricular tachycardia follow typical patterns that might provide "signatures" corresponding to reentry substrates with distinctive functional properties.
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Affiliation(s)
- A Vinet
- Research Centre, Hôpital du Sacré-Coeur de Montréal, Québec, Canada
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Sadek I, Kus T, Biron P, Benabdesselam K. Adverse drug reactions and drug substitution in an arrhythmia clinic. Can J Cardiol 1995; 11:1001-4. [PMID: 8542541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE To assess the impact of adverse drug reactions on antiarrhythmic drug substitution in ambulatory patients. SETTING Tertiary care dysrhythmia clinic. PATIENTS AND METHODS A total of 671 medical records were reviewed. Sex of the study population was equally distributed, with an average age of 53 years. Follow-up averaged 26 months for patients seen more than once. Suspected adverse drug reactions and substitution of antiarrhythmic agent were used to ascertain events in patients' charts. Patients were exposed to 1253 treatment courses. The number of successive antiarrhythmic agents per patient averaged 1.8 and varied from one to seven. RESULTS One hundred and thirty-nine (20%) patients experienced a total of 194 adverse events (15.5% of drug courses), of which only eight (4%) were serious. Ninety-four per cent of the mostly benign adverse drug reactions were followed by a therapeutic modification: discontinuation or replacement in 87% and dosage reduction in 7%. The influence of successive drug changes was evident: the risk of a reaction was 7% in patients exposed to one agent compared with 100% in patients exposed to a seventh agent. CONCLUSIONS First, therapeutic substitution in response to adverse drug reactions appears to be determined more by the combined expected benefit, the product of arrhythmia severity and drug efficacy, than by the severity alone of the adverse reaction; and second, the probability of an adverse drug reaction is proportional to the number of agents tried consecutively, possibly as a result of patient selection, drug selection and increased patient and doctor awareness.
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Affiliation(s)
- I Sadek
- Research Centre, Hôpital du Sacré Coeur, Montréal, Québec
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Kus T, Nadeau R, Costi P, Molin F, Primeau R. Comparison of the diagnostic yield of Holter versus transtelephonic monitoring. Can J Cardiol 1995; 11:891-4. [PMID: 7489527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVE To compare the diagnostic yield of transtelephonic monitoring (TTM) with Holter monitoring in patients presenting possibly arrhythmogenic symptoms. DESIGN A prospective comparison of Holter monitoring with TTM performed sequentially in all subjects. SETTING Tertiary arrhythmia clinic at Hôpital du Sacré-Coeur de Montréal, Montréal, Québec. PATIENTS One hundred consecutive patients (34 men and 66 women, mean +/- SD age 55 +/- 16 years) presenting over a two-year period for diagnosis of intermittent palpitations and/or syncope/dizziness. INTERVENTIONS Subjects first underwent 24 h Holter monitoring and then were provided with TTM for 25 +/- 13 days, with instructions to record during symptomatic episodes and subsequently to transmit the recording at their convenience. MAIN RESULTS Holter monitoring documented arrhythmia in 30 patients whereas TTM identified arrhythmia in 21. TTM was most useful in excluding arrhythmia during symptoms (34 patients) versus Holter (two patients). Neither method was useful in diagnosing syncope. Frequency of occurrence of palpitations did not predict which method would most likely yield a diagnosis but palpitations lasting longer than 2 mins were likely to be diagnosed by TTM. CONCLUSIONS Holter and TTM are complementary studies whose combined use increases the diagnostic yield of arrhythmia. Further, TTM is of greatest use in excluding arrhythmia during intermittent symptoms.
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Affiliation(s)
- T Kus
- Division of Cardiology and Research Center, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Québec
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Klug D, Ferracci A, Molin F, Dubuc M, Savard P, Kus T, Hélie F, Cardinal R, Nadeau R. Body surface potential distributions during idiopathic ventricular tachycardia. Circulation 1995; 91:2002-9. [PMID: 7895359 DOI: 10.1161/01.cir.91.7.2002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND The purpose of this report is to describe the body surface potential maps (BSPMs) during idiopathic ventricular tachycardia (VT) and to determine what differences exist between different idiopathic VT morphologies. METHODS AND RESULTS We performed BSPMs during VT on 12 consecutive patients (3 women and 9 men; mean age, 42 +/- 13 years) presenting symptomatic idiopathic VT referred to our institution for electrophysiological study. Basal ECG, chest radiograph, and echocardiogram were normal in all patients. Clinical tachycardia showed left bundle branch block pattern (LBBB) in 9 patients, with sustained VT in 5 and nonsustained VT in 4, and right bundle branch block pattern (RBBB) in 3 with sustained VT. We found a unique pattern of BSPMs in each of the 9 patients during idiopathic LBBB VT configuration, whether sustained or nonsustained VT. This pattern appeared at the onset of the QRS and remained stable during the whole QRS complex. The area of minimal potential located in the upper anterior part of the torso was compatible with an origin of VT in the right ventricular outflow tract, as confirmed in 5 patients by successful radiofrequency ablation. We found an evolving pattern with two phases in each of the three RBBB VTs. The electrical axis during the initial part of the QRS could correspond to an endocardial-epicardial vector. The second phase, with a high voltage and area of minimal potential located in the inferior and anterior part of the torso, was compatible with a left ventricular apical origin that was confirmed by epicardial and endocardial mapping during cryosurgery in 1 patient. For all the VTs, the QRS isoarea maps showed the same pattern as the second phase of the QRS. CONCLUSIONS Two different BSPM patterns were found. All LBBB VTs had the same stable pattern corresponding to an infundibular origin. All RBBB VTs had an evolving pattern that stabilized in the second part of the QRS complex corresponding to an apical origin.
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Affiliation(s)
- D Klug
- Research Center, Hôpital du Sacré-Coeur de Montréal, Québec, Canada
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Hatala R, Savard P, Tremblay G, Pagé P, Cardinal R, Molin F, Kus T, Nadeau R. Three distinct patterns of ventricular activation in infarcted human hearts. An intraoperative cardiac mapping study during sinus rhythm. Circulation 1995; 91:1480-94. [PMID: 7867190 DOI: 10.1161/01.cir.91.5.1480] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Comprehensive data based on single-beat analysis of the ventricular activation sequence during sinus rhythm in infarcted hearts are currently not available. It was the aim of our study (1) to measure and analyze these activation sequences on the epicardial surface of the right and left ventricles and on the left ventricular endocardial surface, and (2) to correlate specific activation patterns with the surface ECG. METHODS AND RESULTS Isochronal maps were computed from 127 endocardial and epicardial unipolar electrograms recorded simultaneously during sinus rhythm in 45 post-myocardial infarction patients operated on for recurrent ventricular tachycardia (age, 57 +/- 10 years [mean +/- SD], left ventricular ejection fraction, 29 +/- 9%). Patients with bundle-branch block, but not with intraventricular conduction defects, were excluded. Data such as the timing of initial and terminal activation, the number of breakthroughs, the total activation time, and the number of ventricular segments without activation were measured and analyzed according to location of the myocardial infarction. The global epicardial activation was characterized in all patients by a widespread initial breakthrough on the anterior right ventricle (16 +/- 8 milliseconds after QRS onset), which was followed by one or two other breakthroughs in 65% of patients. Subsequently, three characteristic epicardial patterns of the activation spread were found: (1) radial, from the right to the left ventricle, found in all patients with inferoposterior myocardial infarction; (2) counterclockwise rotation, in which posteroseptal crossing preceded the anteroseptal crossing, found in 38% of patients with anterior myocardial infarction; and (3) pincerlike encirclement, in which both septal crossings and/or breakthroughs occurred nearly simultaneously and merged at the left ventricular free wall (typical for apical involvement in anterior and combined myocardial infarction). The simultaneous presence of multiple major activation wave fronts typically found in patients with the pincerlike activation pattern was reflected on the surface ECG by multiphasic, notched QRS complexes. Activation delay was observed in 89% of patients, and terminal activation was topographically related to myocardial infarction in 94% of patients. Delayed activation exceeding the surface QRS was observed in 11% and 31% of cases on the endocardium and epicardium, respectively. CONCLUSIONS These results offer a solid basis for a more precise interpretation of a wide range of electrophysiological data and provide a framework for future investigations of surface ECG reflections of endocardial and epicardial activation patterns recorded in patients with chronic myocardial infarction.
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Affiliation(s)
- R Hatala
- Research Center, Hôpital du Sacré-Coeur de Montréal, Quebec, Canada
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Novak V, Novak P, Kus T, Nadeau R. Slow cardiovascular rhythms in tilt and syncope. J Clin Neurophysiol 1995; 12:64-71. [PMID: 7896911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The cardiovascular oscillations during orthostasis were analyzed by time-frequency mapping in 23 patients with history of vasodepressor (VD) syncope and in 10 control subjects. Syncope was induced by head-up tilt (80 degrees, 25 min) alone in 11 patients (VD-1). Twelve patients remained asymptomatic (VD-2) during this tilt, but presented VD syncope or presyncope during tilt with an isoproterenol infusion. Data from the first tilt without isoproterenol infusion are presented here. Amplitude of sympathetically-mediated nonrespiratory fluctuations [0.01 Hz-respiratory frequency (Rf)] in blood pressure was greater at the beginning of the tilt in both (VD-1 and VD-2) groups compared to controls. Nonrespiratory oscillations were present throughout the tilt and their amplitude increased toward its end (p < 0.001) in VD-2 and control groups. In contrast, in the VD-1 group, the amplitude of 0.01-0.05 Hz rhythm in blood pressure diminished shortly after the beginning of tilt and continued to decline toward the syncope. Nonrespiratory fluctuations in R-R intervals were greatest in VD-1 group. The slow blood pressure rhythms reflect an integrity of feedback loops, and their disappearance is an early sign of an impending syncope.
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Affiliation(s)
- V Novak
- Department of Neurosciences, Jewish General SMBD Hospital, Montreal, Canada
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Derakhchan K, Pagé P, Lambert C, Kus T. Effects of procainamide and propafenone on the composition of the excitable gap in canine atrial reentry tachycardia. J Pharmacol Exp Ther 1994; 270:47-54. [PMID: 8035342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The effects of procainamide and propafenone on the composition of the excitable gap (EG) were studied in a canine model of atrial flutter (AFI) around the tricuspid valve. In 14 open-chest, chloralose-anesthetized dogs, a Y-shaped incision was made in the intercaval area extending to the right atrial appendage. Atrial effective refractory period (ERP) was measured at constant stimulation cycle lengths (CLs) (200 and 300 msec) at each of five recording sites around the tricuspid valve. The EG as defined by the reset-response curve was determined by introducing premature stimuli during AFI induced by burstpacing. Seven dogs each received procainamide or propafenone as a bolus followed by infusion. At constant plasma levels, both drugs increased ERP at constant paced CL and prolonged the reentry CL. In the absence of drug, reset-response curves were mixed, demonstrating an EG composed of both partially (increasing portion) and fully (flat portion) excitable tissue. Procainamide and propafenone shifted the curve upward and to the right and prolonged ERP during AFI, but did not change the duration of the EG. On procainamide, fully excitable tissue was preserved, but on propafenone, in some cases, the fully excitable part of the gap was reduced markedly or even eliminated. In conclusion, both drugs can prolong AFI CL by a direct effect on conduction velocity in fully excitable tissue. In addition, propafenone's effect on refractoriness can contribute significantly in some cases to slowing of AFI.
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Affiliation(s)
- K Derakhchan
- Research Centre, Hôpital du Sacré-Coeur de Montréal, Quebec, Canada
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Sadek I, Biron P, Kus T. Amiodarone-induced epididymitis: report of a new case and literature review of 12 cases. Can J Cardiol 1993; 9:833-6. [PMID: 8281484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
OBJECTIVE To report a new case and review the literature of amiodarone-related epididymitis to improve knowledge of the clinical characteristics of this reaction. DESIGN Cohort study. SETTING Tertiary out-patient arrhythmia clinic. PATIENTS Males currently treated for arrhythmias with amiodarone for at least two months. Thirty-two patients were identified and all were contacted. OUTCOME MEASURES Swelling and or/pain in the scrotum with confirmation of noninfectious epididymitis by a urologist. DATA SOURCES Bibliography (Medline and Embase) and databases (Manufacturer, Health Protection Branch, World Health Organisation). STUDY SELECTION Four articles with case reports. Databases searched for these key words: amiodarone and epididymitis. RESULTS A new case is reported. Twelve cases have been presented individually and six more described collectively. Times to onset range from four to 71 months, daily doses range from 200 to 800 mg. The reaction is self-limited, with or without amiodarone reduction, and does not require antimicrobial drugs, but a noninvasive urological examination may be warranted. CONCLUSION Awareness by cardiologists will prevent unnecessary invasive urological investigations or antibiotic therapy.
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Affiliation(s)
- I Sadek
- Department of Pharmacology, Université de Montréal, Research Centre, Hôpital du Sacré coeur, Québec
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Abstract
Atrioventricular (AV) node ablation to control ventricular response was attempted in two patients with recurrent drug refractory atrial flutter. Standard radiofrequency (RF) procedure, which delivers energy through the 4-mm tip electrode of an ablation catheter positioned at the right AV junction and a large back plate (unipolar mode), failed in both patients. As an accepted second step, high energy direct current (DC) ablation under general anesthesia was then performed in patient one. After two shocks of 200 J, complete AV block occurred, but complete recovery was noted 3 hours later. In a third session for patient 1 and in the first session for patient 2 (after 15 unsuccessful unipolar right-sided RF applications), a second ablation catheter was introduced via the femoral artery on the left side of the His bundle area under the aortic valves. Energy was then delivered in a bipolar fashion between the tip electrodes of the right-sided and the left-sided catheter. Complete and permanent AV block (follow-up: 3 and 1 months) was created within 4 and 1.5 seconds, respectively, in each patient. No complication was encountered and echocardiograms and blood levels of cardiac enzymes were all normal after the procedures. This new approach, after further evaluation, may represent a useful additional step in the strategy of AV node ablation and could be applied before high energy DC shock when the standard RF procedure is unsuccessful.
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Affiliation(s)
- F Molin
- Research Center, Hôpital du Sacré-Coeur de Montréal, Canada
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Dubuc M, Nadeau R, Tremblay G, Kus T, Molin F, Savard P. Pace mapping using body surface potential maps to guide catheter ablation of accessory pathways in patients with Wolff-Parkinson-White syndrome. Circulation 1993; 87:135-43. [PMID: 8419000 DOI: 10.1161/01.cir.87.1.135] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND. A pace mapping technique using body surface potential maps (BSPMs) was developed to guide the positioning of an ablation catheter at the ventricular insertion point of accessory pathways (AP) in patients with the Wolff-Parkinson-White syndrome (WPW). METHODS AND RESULTS. The study was performed on 30 WPW patients. BSPMs were recorded with 63 leads distributed over the entire torso surface. The catheter used for radiofrequency ablation was first placed in the vicinity of the ventricular preexcitation site predicted by BSPMs recorded during the delta wave. BSPMs were then recorded during pacing with this catheter, the comparison between the preexcited and paced BSPMs indicated whether the pacing site was too anterior or posterior with respect to the preexcitation site, and the catheter was moved accordingly. This process was repeated until the preexcited and paced BSPMs were highly correlated (r > or = 0.8), and ablation then was attempted. It was possible to successfully ablate the AP in 28 patients after an investigation that lasted 54 +/- 44 minutes between the recording of the first paced BSPM and that of the BSPM paced at the successful ablation site. Patients with left free wall pathways needed less investigation time compared with patients with pathways of other locations (46 +/- 9 versus 100 +/- 25 minutes, p = 0.031). The sensitivity of BSPM pace mapping was assessed using pacing with a multipolar catheter, and significant changes were observed on the BSPMs for beats with pacing sites that were only 5 mm apart. CONCLUSIONS, BSPM pace mapping allowed us to achieve a 93% success rate with short investigation durations, provides significant information that cannot be obtained with the standard 12-lead ECG, is a self-correcting procedure that reduces the importance of BSPM alterations due to individual differences in the shape of the torso or heart, and is applicable only to patients with AP showing antegrade conduction.
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Affiliation(s)
- M Dubuc
- Research Center, Hôpital du Sacré-Coeur de Montréal, Québec, Canada
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Kus T, Campa MA, Nadeau R, Dubuc M, Kaltenbrunner W, Shenasa M. Efficacy and electrophysiologic effects of oral sotalol in patients with sustained ventricular tachycardia caused by coronary artery disease. Am Heart J 1992; 123:82-9. [PMID: 1729853 DOI: 10.1016/0002-8703(92)90750-p] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The efficacy of oral sotalol in preventing sustained ventricular tachycardia induction by invasive electrophysiological testing was assessed in 22 patients (60 +/- 9 years) with prior myocardial infarction. Programmed stimulation consisted of two basic drives followed by up to three extrastimuli at two right ventricular sites. At baseline, sustained monomorphic ventricular tachycardia was inducible in all patients. With sotalol (360 +/- 172 mg/day), it was no longer inducible in 10 patients; in 12 others, it remained inducible and its cycle length was only minimally prolonged (322 +/- 42 to 345 +/- 44 msec, p less than 0.05). Sotalol markedly prolonged sinus cycle length, uncorrected QT interval, and right ventricular effective and functional refractory periods, but had little effect on ventricular conduction time either in sinus rhythm or with right ventricular pacing. There was no significant difference in drug dose or in electrophysiologic effect of drug that related to efficacy, nor was there any correlation between drug-induced prolongation of ventricular tachycardia cycle length and its effects. Six patients received oral sotalol over the long term without spontaneous recurrence of ventricular tachycardia (follow-up: 23 +/- 18 months). These results demonstrate that sotalol is effective (45%) against sustained ventricular tachycardia induction at moderate doses and is well tolerated over a long term in the setting of remote myocardial infarction. However, its electrophysiologic effects as measured at invasive testing are not predictive of efficacy against ventricular tachycardia induction.
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Affiliation(s)
- T Kus
- Clinical Electrophysiology Laboratory, Sacré-Coeur Hospital, Montreal, Québec, Canada
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Abstract
The effects of procainamide were studied in a model of atrial flutter around the tricuspid valve in seven open chest, chloralose-anesthetized dogs (31 +/- 3 kg). A Y-shaped incision in the intercaval area extending to the right atrial appendage was made and five bipolar electrodes were sutured on the atrial epicardium around the tricuspid valve. Reentry tachycardia was induced in the absence and presence of drug by burst pacing. Procainamide (15 mg/kg bolus followed by 0.075 mg/kg/min infusion) produced stable plasma levels (38 +/- 9 microM) during the study. At a pacing cycle length of 200 msec, mean (+/- SD) diastolic threshold at the five sites increased from 1.6 +/- 1.5 to 2.0 +/- 1.7 mA and mean atrial effective refractory period from 125 +/- 9 to 140 +/- 16 msec on drug (P less than 0.05). Procainamide prolonged the cycle length of atrial flutter from 144 +/- 10 to 160 +/- 13 msec and slowed conduction velocity during atrial flutter around the tricuspid valve from 73 +/- 6 to 66 +/- 6 cm/sec (P less than 0.05). A reset response curve was determined by introducing premature stimuli during atrial flutter. Procainamide prolonged effective refractory period during atrial flutter from 101 +/- 13 to 116 +/- 17 msec but did not change the duration of the excitable gap (38 +/- 9 vs 40 +/- 18 msec). Although the reset response curve was predominantly increasing, in six of seven experiments there was present a flat portion at long coupling intervals approaching the atrial flutter cycle length that comprised 23% +/- 10% of the excitable gap.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- T Kus
- Research Center, Hôpital du Sacré-Coeur de Montréal, Quebec, Canada
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Lacroix D, Dubuc M, Kus T, Savard P, Shenasa M, Nadeau R. Evaluation of arrhythmic causes of syncope: correlation between Holter monitoring, electrophysiologic testing, and body surface potential mapping. Am Heart J 1991; 122:1346-54. [PMID: 1950999 DOI: 10.1016/0002-8703(91)90576-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Holter monitoring, electrocardiographic (ECG) signal-averaging, body surface potential mapping (BSPM) for PQRST isoarea maps, and electrophysiologic study (EPS) were performed in 100 patients with syncope. Coronary artery disease (CAD) was found in 46 patients and other heart disease was found in 19. EPS was diagnostic in 44 patients, while Holter monitoring suggested a diagnosis in only 21 patients. Abnormal BSPM was frequently seen (56%), especially in CAD (70%), or with inducible ventricular tachycardia (VT) (87%). Late potentials were recorded in 13 patients with CAD; five had inducible VT. In seven other patients with VT, they were either absent or bundle branch block (BBB) was found. Thirteen deaths (three sudden) occurred in our series. EPS-guided therapy resulted in a low rate of total cardiac death. In conclusion, EPS had a higher diagnostic yield than Holter monitoring regardless of cardiac pathology. ECG signal-averaging was useful in predicting VT only in patients with CAD without BBB. BSPM was abnormal in most patients with cardiac disease, but poorly predicted VT.
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Affiliation(s)
- D Lacroix
- Research Center, Hôpital du Sacré-Coeur de Montréal, Québec, Canada
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Fromer M, Gloor H, Kus T, Kappenberger L, Shenasa M. Clinical experience with the Intertach 262-12 pulse generator in patients with recurrent supraventricular and ventricular tachycardia. Pacing Clin Electrophysiol 1990; 13:1955-9. [PMID: 1704574 DOI: 10.1111/j.1540-8159.1990.tb06923.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An antitachycardia pulse generator, the Intermedics Intertach 262-12 was implanted in 16 patients (14 patients with supraventricular tachycardia of various origins and two patients with recurrent ventricular tachycardia), who were not responsive to various antiarrhythmic drug regimens. The follow-up was from 6-49 months (mean 30.9 +/- 13.8). Five patients had a follow-up of over 3 years. The device was used in all patients. One patient with ventricular tachycardia died from a nonarrhythmic cause. Loss of responsiveness to burst pacing was observed in 1/14 patients with supraventricular tachycardia and nontolerance of antitachycardia pacing in one patient. Overall clinical success of pacing was observed in 13/16 patients = 81%. The pacemaker proved to be a versatile system with reliable tachycardia detection and termination functions.
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Affiliation(s)
- M Fromer
- Division of Cardiology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
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