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Saltiel J, Molinsky R, Lebwohl B. Predictors of Outcomes in Endoscopies for Foreign Body Ingestion: A Cross-Sectional Study. Dig Dis Sci 2020; 65:2637-2643. [PMID: 31907772 DOI: 10.1007/s10620-019-06033-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 12/24/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND As foreign body ingestion/food impaction is one of the less common indications for upper endoscopy in adults, few studies have investigated outcomes. We aimed to determine the distribution of ingested items warranting endoscopy and to identify factors associated with successful endoscopic retrieval. METHODS We conducted a retrospective, cross-sectional study, identifying all endoscopies performed between June 2006 and June 2018 for foreign body ingestion or food impaction. We performed univariate and multivariate analyses to identify variables associated with endoscopic foreign body visualization and successful removal from the mouth. RESULTS Of the 168 endoscopies identified, the ingested item was visualized in 131 (78%) and was removed from the mouth in 88 (52.4%). 6.5% of cases required surgery and 2.4% of cases had a perforation noted. The two most common foreign bodies were food boluses (51.2%) and bones (28.6%). Older patients were more likely to have their ingested foreign body visualized during endoscopy (age ≥ 70 compared to 18-29 adjusted odds ratio [aOR] 8.78; 95% CI 1.62-47.70) and more likely to have it removed from the mouth (aOR 5.57; 95% CI 1.34-22.85). Bones were less likely to be visualized on endoscopy (aOR 0.16; 95% CI 0.04-0.57) but not less likely to be removed successfully (aOR 0.85; 95% CI 0.42-1.72). Foreign bodies visible on radiography were more likely to be identified on endoscopy (aOR 9.07; 95% CI 2.71-30.37) and more likely to be successfully removed (aOR 2.82; 95% CI 1.26-6.32). CONCLUSIONS Factors such as age, radiographic visibility, and the suspected foreign body may affect the likelihood that it can be visualized and removed. Future studies should focus on further characterizing complications of foreign body ingestions and the types of patients and objects most at risk.
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Affiliation(s)
- Jason Saltiel
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, 630 West 168th St, New York, NY, 10032, USA.
| | - Rebecca Molinsky
- Department of Epidemiology, Columbia University Mailman School of Public Health, 722 West 168th St, New York, NY, 10032, USA
| | - Benjamin Lebwohl
- Department of Medicine, Columbia University Vagelos College of Physicians and Surgeons, 630 West 168th St, New York, NY, 10032, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, 722 West 168th St, New York, NY, 10032, USA
- Division of Digestive and Liver Diseases, Department of Medicine, Columbia University Irving Medical Center, 180 Fort Washington Avenue, Suite 936, New York, NY, 10032, USA
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Fedorova OA, Fedorov YV, Labazava IE, Gulakova EN, Saltiel J. Complexes of amino acids with a crown-ether derivative of 4-styrylpyridine. Monotopic or ditopic? Photochem Photobiol Sci 2011; 10:1954-62. [DOI: 10.1039/c1pp05007a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Saltiel J, Smothers WK, Schanze KS, Charman SA, Bonneau R. 2,5-Dimethyl-2,4-hexadiene induced photodechlorination of 9,10-dichloroanthracene. Photochem Photobiol Sci 2009; 8:856-67. [DOI: 10.1039/b821683e] [Citation(s) in RCA: 3] [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: 01/29/2023]
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Saltiel J, Dmitrenko O, Pillai ZS, Klima R, Wang S, Wharton T, Huang ZN, van de Burgt LJ, Arranz J. Triplet and ground state potential energy surfaces of 1,4-diphenyl-1,3-butadiene: theory and experiment. Photochem Photobiol Sci 2008; 7:566-77. [DOI: 10.1039/b801075g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fedorova O, Fedorov YV, Gulakova E, Schepel N, Alfimov M, Goli U, Saltiel J. Supramolecular photochemical synthesis of an unsymmetrical cyclobutane. Photochem Photobiol Sci 2007; 6:1097-105. [PMID: 17914484 DOI: 10.1039/b707093d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-styrylbenzothiazole (1) and cinnamic acid (2) derivatives containing 15-crown-5 ether moieties form a supramolecular assembly in the presence of Ba(2+) cations in acetonitrile. The assembly is stabilized by hydrogen bonding between the heterocyclic N atom of 1 and the proton of the carboxylic group of 2, by sandwich Ba(2+) complex formation between the crown ether moieties of 1 and 2, and by pi-pi stacking interactions. Irradiation of solutions containing these supramolecular complexes leads to highly specific formation of an unsymmetrical cycloadduct. This investigation provides an interesting example of supramolecular control of [2 + 2]-photocyclization in solution.
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Affiliation(s)
- O Fedorova
- Photochemistry Center of Russian Academy of Sciences, Novatorov str., 7a, 119421, Moscow, Russia
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Saltiel J, Ivanov RA, Gormin DA, Krishna TSR, Clark RJ. Conformationally restricted 2,5-diphenyloxazoles: failure of the electromer model for anomalous amplified spontaneous emission spikes. Mol Phys 2006. [DOI: 10.1080/00268970500417218] [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: 10/24/2022]
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Fedorov Y, Fedorova O, Schepel N, Alfimov M, Turek AM, Saltiel J. The Photochemistry of a bis-Crown Ether Based on Benzobis(thiazole) and Its Alkaline Earth Metal Cation Complexes. Photochem Photobiol 2006; 82:1108-15. [PMID: 16613524 DOI: 10.1562/2005-12-11-ra-751] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Irradiation of acetonitrile solutions of the bis-crown ether E,E-2,7-bis[2-(6,7,9,10,12,13,15,16-octahydro-5,8,11,14,17-pentaoxabenzocyclopentadecen-2-yl)vinyl]-benzo[1,2-d;3,4-d']bisthiazole (hereafter, 1) gives efficient E --> Z photoisomerization (initial phi(trans --> cis) = 0.48), leading to lambda(exc)-dependent quasi-photostationary states composed primarily of E,Z and E,E isomer mixtures. Further irradiation gives [2 + 2]-cycloadducts of 1. In the presence of Ba2+ ions, essentially quantitative formation of 2:2 complexes, 1(2) x (Ba2+)2 controls the photochemical outcome. E --> Z photoisomerization of the ligand is entirely suppressed and efficient intramolecular [2 + 2]-photocycloaddition in the complexes leads to cyclobutane dimers of 1 (phiCB = 0.26). The reactivity of 1 in the presence of Mg2+ ions for which 1:2 complex formation dominates gives both cis-trans photoisomerization and enhanced photocycloaddition.
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Affiliation(s)
- Yu Fedorov
- Photochemistry Center of Russian Academy of Sciences, Moscow
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Fedorov YV, Fedorova O, Schepel N, Alfimov M, Turek AM, Saltiel J. Synthesis and multitopic complex formation of a photochromic bis(crown ether) based on benzobis(thiazole). J Phys Chem A 2005; 109:8653-60. [PMID: 16834267 DOI: 10.1021/jp0515333] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2,7-Bis[2-(6,7,9,10,12,13,15,16-octahydro-5,8,11,14,17-pentaoxabenzocyclopentadecen-2-yl)vinyl]-benzo[1,2-d;3,4-d']bisthiazole, 2, with crown ether styryl moieties substituted on a heterocyclic core, was synthesized and its complex forming ability with several metal cations was evaluated in acetonitrile by absorption and fluorescence spectroscopy. The results are compared to those for the analogous ligand possessing a single crown ether styryl moiety. Selective binding of the metal cation at the heterocyclic core of both ligands was observed only for Hg2+. Alkali and alkaline earth cations bind selectively at the crown ether moieties. Stability constants and pure spectra of defined stoichiometry were determined with the use of HYPERQUAD, a least-squares fitting program, and the results were validated in one case by subjecting the titration spectral matrix to singular value decomposition with self-modeling (SVD-SM). The multitopic ligand 2 forms relatively strong 2:2 stoichiometric complexes with K+, among the alkali metal cations, and Ba2+, among the alkaline earth metal cations, and is a promising selective optical sensor for these ions.
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Affiliation(s)
- Yu V Fedorov
- Photochemistry Center of Russian Academy of Sciences, Novatorov str., 7a, 119421, Moscow, Russia
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Saltiel J, Sears DF, Mallory FB, Mallory CW, Buser CA. Resolution and structural assignment of the three components in trans-1,2-di-2-naphthylethene fluorescence. J Am Chem Soc 2002. [DOI: 10.1021/ja00267a047] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Saltiel J, Eaker DW. Principal component analysis applied to 1-phenyl-2-(2-naphthyl)ethene fluorescence. Four components not two. J Am Chem Soc 2002. [DOI: 10.1021/ja00336a054] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sun YP, Sears DF, Saltiel J. Principal component self-modeling analysis applied to conformational equilibration of 1,3-butadiene vapor. UV spectra and thermodynamic parameters of the two conformers. J Am Chem Soc 2002; 110:6277-8. [DOI: 10.1021/ja00226a071] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [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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Saltiel J, Sears DF, Choi JO, Sun YP, Eaker DW. Fluorescence, fluorescence-excitation, and ultraviolet absorption spectra of trans-1-(2-naphthyl)-2-phenylethene conformers. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100052a008] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Saltiel J, Zimányi L. Dissecting the photocycle of the bacteriorhodopsin E204Q mutant from kinetic multichannel difference spectra. Extension of the method of singular value decomposition with self-modeling to five components. J Am Chem Soc 2001; 123:3332-40. [PMID: 11457069 DOI: 10.1021/ja0030414] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Kinetic multichannel difference spectroscopy in the visible spectral range of the Glu204 --> Gln(E204Q) site-directed mutant of bacteriorhodopsin revealed five spectrally distinct metastable intermediates, as for the wild type. Due to the perturbation of the extracellular proton release cluster, the late O intermediate accumulates in much higher amounts in this mutant, and the photocycle is not complicated by the pH-dependent branching observed in the wild type protein. This mutant is therefore more amenable than the wild type to the determination of the intermediate spectra with the method of singular value decomposition with self-modeling, developed recently for three components (Zimányi et al. Proc. Natl. Acad. Sci. U.S.A. 1999, 96, 4408-4413, 4414-4419). The method provides the most reliable spectra so far, defining the time evolution of the intermediates essential to the determination of the reaction scheme that describes the photocycle. The analysis confirms published results on this mutant by and large, but revises the locations of the L intermediates in the photocycle. In addition, it allows identification of the pH-dependent transitions of the photocycle, and offers an alternative mechanism for the pH dependence of the yield and kinetics of the late O intermediate.
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Alfimov MV, Gromov SP, Fedorov YV, Fedorova OA, Vedernikov AI, Churakov AV, Kuz'mina LG, Howard JAK, Bossmann S, Braun A, Woerner M, Sears, DF, Saltiel J. Synthesis, Structure, and Ion Selective Complexation of Trans and Cis Isomers of Photochromic Dithia-18-crown-6 Ethers. J Am Chem Soc 1999. [DOI: 10.1021/ja990370r] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. V. Alfimov
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - S. P. Gromov
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - Yu. V. Fedorov
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - O. A. Fedorova
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - A. I. Vedernikov
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - A. V. Churakov
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - L. G. Kuz'mina
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - J. A. K. Howard
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - S. Bossmann
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - A. Braun
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - M. Woerner
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - D. F. Sears,
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
| | - J. Saltiel
- Contribution from the Photochemistry Center of the Russian Academy of Sciences, Novatorov str. 7a, 117421 Moscow, Russia, Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii prosp. 31, Moscow, GSP-1, 117907, Russia, Chemistry Department, University of Durham, South Road, Durham, U.K. DH1 3LE, Engler-Bunte-Institut, Universität Karlsruhe (TH), Richard-Willstär-Allee 5, 76128 Karlsruhe, Germany, and Department of Chemistry, The Florida State University, Tallahassee
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Zimányi L, Kulcsár A, Lanyi JK, Sears DF, Saltiel J. Intermediate spectra and photocycle kinetics of the Asp96 --> asn mutant bacteriorhodopsin determined by singular value decomposition with self-modeling. Proc Natl Acad Sci U S A 1999; 96:4414-9. [PMID: 10200276 PMCID: PMC16346 DOI: 10.1073/pnas.96.8.4414] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Singular value decomposition with self-modeling is applied to resolve the intermediate spectra and kinetics of the Asp96 --> Asn mutant bacteriorhodopsin. The search for the difference spectra of the intermediates is performed in eigenvector space on the stoichiometric plane. The analysis of data at pH values ranging from 4 to 8 and temperatures between 5 and 25 degrees C reveals significant, early partial recovery of the initial state after photoexcitation. The derived spectra are not biased by assumed photocycles. The intermediate spectra derived in the initial step differ from spectra determined in prior analyses, which results in intermediate concentrations with improved stoichiometric properties. Increasingly more accurate photocycles follow with increasing assumed complexity, of which parallel models are favored, consistent with recent, independent experimental evidence.
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Affiliation(s)
- L Zimányi
- Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, Szeged, H-6701, Hungary
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Zimányi L, Kulcsár A, Lanyi JK, Sears DF, Saltiel J. Singular value decomposition with self-modeling applied to determine bacteriorhodopsin intermediate spectra: analysis of simulated data. Proc Natl Acad Sci U S A 1999; 96:4408-13. [PMID: 10200275 PMCID: PMC16345 DOI: 10.1073/pnas.96.8.4408] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An a priori model-independent method for the determination of accurate spectra of photocycle intermediates is developed. The method, singular value decomposition with self-modeling (SVD-SM), is tested on simulated difference spectra designed to mimic the photocycle of the Asp-96 --> Asn mutant of bacteriorhodopsin. Stoichiometric constraints, valid until the onset of the recovery of bleached bacteriorhodopsin at the end of the photocycle, guide the self-modeling procedure. The difference spectra of the intermediates are determined in eigenvector space by confining the search for their coordinates to a stoichiometric plane. In the absence of random noise, SVD-SM recovers the intermediate spectra and their time evolution nearly exactly. The recovery of input spectra and kinetics is excellent although somewhat less exact when realistic random noise is included in the input spectra. The difference between recovered and input kinetics is now visually discernible, but the same reaction scheme with nearly identical rate constants to those assumed in the simulation fits the output kinetics well. SVD-SM relegates the selection of a photocycle model to the late stage of the analysis. It thus avoids derivation of erroneous model-specific spectra that result from global model-fitting approaches that assume a model at the outset.
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Affiliation(s)
- L Zimányi
- Institute of Biophysics, Biological Research Center of the Hungarian Academy of Sciences, Szeged, H-6701, Hungary
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Saltiel J, Choi JO, Sears DF, Eaker DW, O'Shea KE, Garcia I. Resolution of trans-1-(2-Naphthyl)-2-phenylethene Fluorescence in the Presence of Tri-n-butylamine into Pairs of Monomer and Exciplex Spectra. Selectivity in Conformer Quenching. J Am Chem Soc 1996. [DOI: 10.1021/ja961340g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Saltiel
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
| | - J.-O. Choi
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
| | - D. F. Sears
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
| | - D. W. Eaker
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
| | - K. E. O'Shea
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
| | - I. Garcia
- Contribution from the Department of Chemistry, The Florida State University, Tallahassee, Florida 32306-3006
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Saltiel J, Zhang Y, Sears DF, Choi JO. Fluorescence, fluorescence-excitation and absorption spectra of trans-1-(2-anthryl)-2-phenylethene conformers. Res Chem Intermed 1995. [DOI: 10.1163/156856795x00558] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Saltiel J, Waller A, Sears D. Dynamics of cis-stilbene photoisomerization: the adiabatic pathway to excited trans-stilbene. J Photochem Photobiol A Chem 1992. [DOI: 10.1016/1010-6030(92)85029-t] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
The clinical and angiographic correlates and the prognostic significance of the "coronary extent score" in a consecutive series of 313 patients who were catheterized twice were studied. The extent score was defined as the number of 5 to 75% stenosed segments in a 15-segment coding system. The extent score was higher in subgroups of patients with new onset angina at the time of the first angiogram (4.3 +/- 2.4 vs 3.3 +/- 1.9, p less than 0.01), unstable angina at the time of the second angiogram (4.0 +/- 2.0 vs 3.3 +/- 1.9, p less than 0.05) or multifocal progression from the first to the second angiogram (4.0 +/- 2.1 vs 3.3 +/- 1.9, p less than 0.01), suggesting that it is an index of active coronary artery disease. The extent score did not correlate with the number of diseased vessels (r = 0.03), the ejection fraction (r = 0.03), the Friesinger score (r = 0.04) and the Gensini score (r = -0.07) (difference not significant for each). Cox's model was fit to the survival data recorded on a prospective basis after the second angiogram. Independent predictors of survival were ejection fraction (p less than 0.001), extent score (p = 0.001), number of diseased vessels (p = 0.01) and percent of left main luminal stenosis (p less than 0.05). The extent score was also an independent predictor of myocardial infarction and unstable angina. Thus, the extent score, an index of active progressive disease, is an independent predictor of mortality and cardiac events in patients with coronary artery disease.
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Affiliation(s)
- A Moise
- Department of Radiology, Montreal Heart Institute, Quebec, Canada
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Moise A, Salamon R, Taeymans Y, Saltiel J. Risk factors and progression of coronary narrowing. Am J Cardiol 1987; 59:388. [PMID: 3812303 DOI: 10.1016/0002-9149(87)90832-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Dussault RG, Raymond-Tremblay D, Lafortune M, Saint-Georges G, Beauchamps D, Perreault G, Saltiel J. Undergraduate radiology clerkship: the Universite de Montreal program. J Can Assoc Radiol 1983; 34:133-135. [PMID: 6885885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
At the Université de Montréal, a four-week rotation in radiology is part of the core curriculum for students in their fifth and final year of medicine. The objective of this undergraduate radiology clerkship is to prepare the future physician to use efficiently the resources of radiology and nuclear medicine in patient care. Specific goals and methods used to achieve them are described and analysed.
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Saltiel J, Thuot R, Bourassa MG. [Applying radioscopy and cardiac cineradiography to the study of coronary disease]. Union Med Can 1979; 108:1494-9. [PMID: 524550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Bourassa MG, Lespérance J, Corbara F, Saltiel J, Campeau L. Progression of obstructive coronary artery disease 5 to 7 years after aortocoronary bypass surgery. Circulation 1978; 58:I100-6. [PMID: 14740688] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
Changes in the native coronary circulation were evaluated 5 to 7 years (72 +/- 10 months) after aortocoronary bypass surgery in 108 patients; 104 had had previous angiographic controls between 6 and 18 months following surgery. Coronary artery narrowings were graded on a scale of 0 to 6, 0 being normal, grade 1 and 2, < or = 50%; grade 3, 51-75%; grade 4, 76-90%; grade 5, 91-99% narrowing and grade 6 total occlusion. Progression of disease was significant when a preexisting stenosis increased at least 1 grade or a new lesion > 50% developed. Nongrafted vessels were compared to arteries with patent or occluded grafts. During the first year following surgery, the rate of progression was much higher in grafted arteries with patent or occluded grafts than in nongrafted arteries 157 and 53% vs 9.5% respectively, P < 0.001). During the subsequent period of approximately 5 years, however, grafted arteries did not change, whereas the rate of progression in nongrafted arteries increased from 9.5 to 46%. At 5 to 7 years after surgery, grade 1 and 2 (< or = 50%) narrowings progressed slightly more frequently in grafted arteries because of surgically related events. However, for narrowings > 50% and for new lesions, there was no difference in the rate of progression between grafted and nongrafted vessels. In conclusion, the rate of progression of atherosclerosis in nongrafted coronary arteries is important. At 5 to 7 years after surgery, there is little or no difference in the severity of the disease in the proximal segments of grafted and nongrafted coronary arteries.
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Affiliation(s)
- M G Bourassa
- Department of Medicine, Montreal Heart Institute, Montreal, Quebec, Canada
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Bourassa MG, Lesperance JJ, Corbara F, Saltiel J, Campeau L. Progression of coronary disease 5 to 7 years after aortocoronary bypass surgery. Cleve Clin Q 1978; 45:175-6. [PMID: 306305 DOI: 10.3949/ccjm.45.1.175] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Chaitman BR, Lespérance J, Saltiel J, Bourassa MG. Clinical, angiographic, and hemodynamic findings in patients with anomalous origin of the coronary arteries. Circulation 1976; 53:122-31. [PMID: 1244233 DOI: 10.1161/01.cir.53.1.122] [Citation(s) in RCA: 270] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Clinical and angiographic features of 31 patients with anomalous coronpary artery origin are reviewed. Of 17 aberrant circumflex arteries from the right sinus of Valsalva or artery, each was retro-aortic, six atherosclerotic, and seven irrigated a small area of myocardium. Of seven anomalous right coronary arteries from the left sinus of Valsalva or artery, each was ante-aortic and two atherosclerotic. Aberrant origin of the circumflex or right coronary artery was a benign anomaly. The proximal course of seven aberrant left coronary arteries from the right sinus of Valsalva or right coronary artery was related to clinical events. The anomaly was best demonstrated in the lateral view. In five cases, coronary blood flow during exercise and myocardial metabolism during pacing were assessed. Two had had a previous infarction with nonatherosclerotic arteries. Exercise coronary blood flow was normal in four and low in one patient. Pacing resulted in lactate production in two with atherosclerotic and one without atherosclerotic arteries. We conclude that anomalous left coronpary origin from the right sinus of Valsalva can result in significant myocardial ischemia and infarction.
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Chaitman BR, Bourassa MG, Lespérance J, Dominguez JL, Saltiel J. Aberrant course of the left anterior descending coronary artery assoicated with anomalous left circumflex origin from the pulmonary artery. Circulation 1975; 52:955-8. [PMID: 1175277 DOI: 10.1161/01.cir.52.5.955] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We have presented a two year nonoperative follow-up of an asymptomatic 14-year-old girl with an unusual anomaly of the coronary arteries. Systolic and diastolic murmurs heard preoperatively did not change following severance of a patent ductus arteriosus. Postoperative selective coronary arteriography revealed (1) anomalous orgin of the left anterior descending artery from the right aortic sinus of Valsalva crossing between the aorta and pulmonary artery, (2) aberrant circumflex artery orgin from the pulmonary artery and (3) collaterals from the left anterior descending and right coronary arteries to the circumflex artery. This combination of coronary anomalies has never been described previously.
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Heitz A, Campeau L, Saltiel J. [Operated cases of ventricular aneurysm and asynergy. Part I. Clinical, electrocardiographic and radiological features (68 cases)]. Coeur Med Interne 1975; 14:487-96. [PMID: 1204309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Lespérance J, Saltiel J, Petitclerc R, Bourassa MG. Angulated views in the sagittal plane for improved accuracy of cinecoronary angiography. Am J Roentgenol Radium Ther Nucl Med 1974; 121:565-74. [PMID: 4846573 DOI: 10.2214/ajr.121.3.565] [Citation(s) in RCA: 76] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Solignac A, Saltiel J, Bourassa MG. [Anomalies in the distribution of coronary arteries and myocardial ischemia. Apropos of 2 cases]. Arch Mal Coeur Vaiss 1974; 67:529-35. [PMID: 4216314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Jacob K, Chabot M, Saltiel J, Campeau L. Improvement of left ventricular asynergy following aortocoronary bypass surgery related to preoperative electrocardiogram and vectorcardiogram. Am Heart J 1973; 86:438-43. [PMID: 4542265 DOI: 10.1016/0002-8703(73)90133-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Lespérance J, Bourassa MG, Saltiel J, Campeau L, Grondin CM. Angiographic changes in aortocoronary vein grafts: lack of progession beyond the first year. Circulation 1973; 48:633-43. [PMID: 4542184 DOI: 10.1161/01.cir.48.3.633] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The angiographic aspect of aortocoronary vein grafts was reviewed three years after operation in 43 patients. These patients had been previously subjected to two selective angiographic studies: two weeks and one year after operation. The review of these angiographic studies suggests that the attrition rate of aortocoronary vein grafts levels off after the first year. Only three occlusions (5.4%) were found on the three-year study in the 55 grafts which were patent on the study conducted at one year. Two of the three occlusions occurred in grafts which had already displayed severe segmental reduction in size after one year. Moreover, the slight to moderate reduction in caliber noted in more than 70% of vein grafts between two weeks and one year after operation did not progress between one and three years. Thus, it appears that fibrous hyperplasia. which is believed responsible for these changes, is a time-limited process, and is not expected to progress after the first year.
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Rozin R, Robin GC, Magora A, Gonen B, Saltiel J. Investigation of gait. 3. Analysis of lower extremities braced with a standard below-knee appliance. Electromyogr Clin Neurophysiol 1972; 12:433-40. [PMID: 4662209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Bourassa MG, Lésperance J, Campeau L, Saltiel J. Fate of left ventricular contraction following aortocoronary venous grafts. Early and late postoperative modifications. Circulation 1972; 46:724-30. [PMID: 4538502 DOI: 10.1161/01.cir.46.4.724] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Changes in left ventriclar contraction were studied approximately two weeks and one year after surgery in 87 patients having 131 venous grafts. Nineteen out of 37 or 51% of the ventricular wall motion defects revascularized by patent and intact grafts were improved following surgery. Hypokinesis was improved in 17 out of 24 instances (70%) and a normal contraction was restored in nearly half of the cases. Akinesis was improved in two out of 13 instances (15%). Following inadequate venous grafts, 15 out of 35 or 42% of the normal wall segments and four out of 16 or 25% of the hypokinetic wall segments were worse after surgery and late akinesis was frequent. Aortocoronary bypass surgery is followed by significant improvement as well as deterioration of left ventricular contraction and function. The late result of surgery is determined by the fate of aortocoronary venous grafts.
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Lespérance J, Bourassa MG, Biron P, Campeau L, Saltiel J. Aorta to coronary artery saphenous vein grafts. Preoperative angiographic criteria for successful surgery. Am J Cardiol 1972; 30:459-65. [PMID: 4538519 DOI: 10.1016/0002-9149(72)90034-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Lespérance J, Bourassa MG, Saltiel J, Grondin CM. Late changes in aortocoronary vein grafts: angiographic features. Am J Roentgenol Radium Ther Nucl Med 1972; 116:74-81. [PMID: 4538318 DOI: 10.2214/ajr.116.1.74] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Bourassa MG, Campeau L, Lespérance J, Saltiel J, Castonguay Y, Grondin P, David P. [Study of changes in left ventricular dynamics and function after aortocoronary bypass]. Arch Mal Coeur Vaiss 1972; 65:417-29. [PMID: 4627183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Perras P, Saltiel J, L'Espérance J. [Dissecting aortic aneurysms]. J Can Assoc Radiol 1971; 22:44-54. [PMID: 5573746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Saltiel J, Lespérance J, Bourassa MG, Castonguay Y, Campeau L, Grondin P. Reversibily of left ventricular dysfunction following aorto-coronary by-pass grafts. Am J Roentgenol Radium Ther Nucl Med 1970; 110:739-46. [PMID: 5486205 DOI: 10.2214/ajr.110.4.739] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Bourassa MG, Lespérance J, Castonguay Y, Campeau L, Saltiel J. Criteria for internal mammary artery implantation based on cine coronary arteriography. Can Med Assoc J 1970; 103:720-3. [PMID: 5506105 PMCID: PMC1930573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Preoperative coronary arteriograms were correlated, in a group of 50 patients, with left internal mammary angiograms obtained from 11 to 32 months, with a mean of 17 months, after mammary artery implantation. In all patients in whom the internal mammary artery was patent and considered functional with good angiographic opacification of the anterior descending coronary artery, the preoperative coronary angiogram showed total or subtotal obstruction of the latter vessel, with indirect evidence of decreased flow and pressure distal to the obstruction. This evidence was provided by the presence of a collateral circulation or, in a few cases of subtotal obstruction, delayed opacification of the vessel distal to the obstruction.In patients in whom the internal mammary artery was patent but showed no anastomotic connection with the anterior descending coronary artery or only opacification of small coronary branches, the degree of coronary obstruction was, in most cases, less than 90% of the lumen of the coronary artery in the absence of any collateral circulation or delayed opacification of the vessel distal to the obstruction.Occlusion of the internal mammary artery was seen as often in the presence of total or subtotal obstructions as with lesser degrees of anterior descending coronary artery obstruction, and is believed unrelated to the degree of pre-existing coronary artery disease.Successful internal mammary artery implantation can be related to specific coronary angiographic patterns recognizable before operation; these may serve as reliable criteria for the selection of patients.
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Bourassa MG, Lespérance J, Campeau L, Bois MA, Saltiel J. Selective coronary angiography using a percutaneous femoral technique. Can Med Assoc J 1970; 102:170-173. [PMID: 20311550 PMCID: PMC1947152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Successful use, in 650 patients over a period of two years, of a percutaneous femoral technique of selective coronary angiography is described. This technique is carried out with the use of mouldable, manually preshaped polyethylene catheters. Preparation of the material and the different steps of the technique are discussed. Excellent flexibility and plastic memory of this catheter material allow easy, rapid and consistent percutaneous insertion and removal of catheters and intubation of the coronary arteries.
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Saltiel J. [Pulmonary artery stenosis or coarctation]. J Radiol Electrol Med Nucl 1969; 50:636-8. [PMID: 5401336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Campeau L, Bourassa MG, Bois MA, Saltiel J, Lesperance J, Rico O, Delcan JL, Telleria M. Clinical significance of selective coronary cinearteriography. Can Med Assoc J 1968; 99:1063-8. [PMID: 5698560 PMCID: PMC1945482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Aerichidé N, Grondin P, Lepage G, Saltiel J, David P. [Coarctation of the aorta complicated by an aneurysm of the left subclavian artery]. Union Med Can 1965; 94:1301-5. [PMID: 5851791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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