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Piccirillo G, Moscucci F, Pofi R, D'Alessandro G, Minnetti M, Isidori AM, Francomano D, Lenzi A, Puddu PE, Alexandre J, Magrì D, Aversa A. Changes in left ventricular repolarization after short-term testosterone replacement therapy in hypogonadal males. J Endocrinol Invest 2019; 42:1051-1065. [PMID: 30838540 PMCID: PMC6692303 DOI: 10.1007/s40618-019-01026-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 02/14/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIM Evidences suggest that androgen deficiency is associated with sudden cardiac death (SCD). Our purpose was to analyse some electrocardiographic (ECG) markers of repolarization phase in hypogonadal patients either at baseline or after testosterone replacement therapy (TRT). PATIENTS AND METHODS Baseline and after 6 months of testosterone replacement therapy, 14 hypogonadal patients and 10 age-matched controls underwent a short-term ECG recordings at rest and immediately after a maximal exercise test. The following ECG parameters have been collected: QTe (the interval between the q wave the end of T wave), QTp (the interval between the q wave and the peak of T wave), and Te (the interval between the peak and the end of T wave). RESULTS At baseline, in the hypogonadal patients, corrected QTe and QTp values were longer at rest than in the controls at rest (p < 0.05), whereas, during the recovery phase, only the QTp remained significantly longer (p < 0.05). After TRT, hypogonadal patients showed an improvement only in Te (p < 0.05). Conversely, any difference between hypogonadal patients and control subjects was found with respect to the markers of temporal dispersion of repolarization phases, except for a worse QTp → Te coherence (p = 0.001) obtained during the recovery phase. CONCLUSIONS In conclusion, at rest, hypogonadal patients suffer from a stable increase in the myocardial repolarization phase without an increase in its temporal dispersion and, hence, the SCD risk seems to be low.
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Affiliation(s)
- G Piccirillo
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche, Anestesiologiche e Geriatriche, Policlinico Umberto I, "La Sapienza" University of Rome, Viale del Policlinico, 00185, Rome, Italy
| | - F Moscucci
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche, Anestesiologiche e Geriatriche, Policlinico Umberto I, "La Sapienza" University of Rome, Viale del Policlinico, 00185, Rome, Italy.
| | - R Pofi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - G D'Alessandro
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche, Anestesiologiche e Geriatriche, Policlinico Umberto I, "La Sapienza" University of Rome, Viale del Policlinico, 00185, Rome, Italy
| | - M Minnetti
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - A M Isidori
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - D Francomano
- Division of Internal Medicine and Endocrinology, Madonna delle Grazie Hospital, Velletri, Rome, Italy
| | - A Lenzi
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - P E Puddu
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche, Anestesiologiche e Geriatriche, Policlinico Umberto I, "La Sapienza" University of Rome, Viale del Policlinico, 00185, Rome, Italy
- EA 4650, Signalisation, électrophysiologie et imagerie des lésions d'ischémie reperfusion myocardique, Université de Caen, Normandie, France
| | - J Alexandre
- EA 4650, Signalisation, électrophysiologie et imagerie des lésions d'ischémie reperfusion myocardique, Université de Caen, Normandie, France
- Department of Pharmacology, CHU Caen, Caen, France
| | - D Magrì
- Dipartimento di Medicina Clinica e Molecolare, S. Andrea Hospital, "Sapienza" University of Rome, Rome, Italy
| | - A Aversa
- Department of Experimental and Clinical Medicine, University of Catanzaro « Magna Grecia », Catanzaro, Italy
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2
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Magrì D, Santolamazza C, Limite L, Mastromarino V, Casenghi M, Orlando P, Pagannone E, Musumeci MB, Maruotti A, Ricotta A, Oliviero G, Piccirillo G, Volpe M, Autore C. QT spatial dispersion and sudden cardiac death in hypertrophic cardiomyopathy: Time for reappraisal. J Cardiol 2017; 70:310-315. [PMID: 28341542 DOI: 10.1016/j.jjcc.2017.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 01/17/2017] [Accepted: 01/27/2017] [Indexed: 01/18/2023]
Abstract
BACKGROUND The 12-lead surface electrocardiographic (ECG) analysis is able to provide independent predictors of prognosis in several cardiovascular settings, including hypertrophic cardiomyopathy (HCM). The present single-center study investigated the possible ability of several ECG-derived variables in stratifying sudden cardiac death (SCD) risk and, possibly, in improving the accuracy of the 2014 European Society of Cardiology guidelines. METHODS A total of 221 consecutive HCM outpatients were recruited and prospectively followed. All of them underwent a full clinical and instrumental examination, including a 12-lead surface ECG to calculate the dispersion for the following intervals: QRS, Q-Tend (QT), Q-Tpeak (QTp), Tpeak-Tend (TpTe), J-Tpeak (JTp), and J-Tend (JT). The study composite end-point was SCD, aborted SCD, and appropriate implantable cardioverter defibrillator (ICD) interventions. RESULTS During a median follow-up of 4.4 years (25th-75th interquartile range: 2.4-9.4 years), 23 patients reached the end-point at 5-years (3 SCD, 3 aborted SCD, 17 appropriate ICD interventions). At multivariate analysis, the spatial QT dispersion corrected according to Bazett's formula (QTcd) remains independently associated to the study endpoint over the HCM Risk-SCD score (C-index 0.737). A QTcd cut-off value of 93ms showed the best accuracy in predicting the SCD endpoint within the entire HCM study cohort (sensitivity 56%, specificity 75%, positive predictive value 22%, negative predictive value 97%). CONCLUSION Our data suggest that the QTcd might be helpful in SCD risk stratification, particularly in those HCM categories classified at low-intermediate SCD risk according to the contemporary guidelines.
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Affiliation(s)
- Damiano Magrì
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy.
| | | | - Luca Limite
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
| | | | - Matteo Casenghi
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
| | - Paola Orlando
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
| | - Erika Pagannone
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
| | | | - Antonello Maruotti
- Department of Scienze Economiche, Politiche e delle Lingue Moderne, Libera Università SS Maria Assunta, Rome, Italy; Centre for Innovation and Leadership in Health Sciences, University of Southampton, Southampton, UK
| | - Agnese Ricotta
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
| | - Giada Oliviero
- Department of Cardiovascular Sciences, University of Insubria, Varese, Italy
| | - Gianfranco Piccirillo
- Department of Cardiovascular, Respiratory, Anesthesiological, Nephrologic and Geriatrics Sciences, "Sapienza" University, Rome, Italy
| | - Massimo Volpe
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy; IRCCS, Neuromed, Pozzilli (IS), Italy
| | - Camillo Autore
- Department of Clinical and Molecular Medicine, "Sapienza" University, Rome, Italy
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Jalanko M, Tarkiainen M, Sipola P, Jääskeläinen P, Lauerma K, Laine M, Nieminen MS, Laakso M, Heliö T, Kuusisto J. Left ventricular mechanical dispersion is associated with nonsustained ventricular tachycardia in hypertrophic cardiomyopathy. Ann Med 2016; 48:417-427. [PMID: 27249556 DOI: 10.1080/07853890.2016.1186826] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
OBJECTIVE We assessed the value of speckle tracking two-dimensional (2D) strain echocardiography (2DSE) measured mechanical dispersion (MD) with other imaging and electrocardiographic parameters in differentiating hypertrophic cardiomyopathy (HCM) patients with and without nonsustained ventricular tachycardia (NSVT) on 24-h ambulatory ECG monitoring. METHODS AND RESULTS We studied 31 patients with HCM caused by the Finnish founder mutation MYBPC3-Q1061X and 20 control subjects with comprehensive 2DSE echocardiography and cardiac magnetic resonance imaging (CMRI). The presence of NSVT was assessed from ambulatory 24-h ECG monitoring. NSVT episodes were recorded in 11 (35%) patients with HCM. MD was significantly higher in HCM patients with NSVT (93 ± 41 ms) compared to HCM patients without NSVT (50 ± 18 ms, p = 0.012) and control subjects (41 ± 16 ms, p < 0.001). MD was the only variable independently associated with the presence of NSVT (OR: 1.60, 95% CI: 1.05-2.45, p = 0.030). Assessed by ROC curves, MD performed best in differentiating between HCM patients with and without NSVT (AUC = 0.81). CONCLUSIONS Increased mechanical dispersion was associated with NSVT in HCM patients on 24-h ambulatory ECG monitoring. Key messages The prediction of sudden cardiac death in hypertrophic cardiomyopathy remains a challenge and novel imaging methods are required to identify individuals at risk of malignant ventricular arrhythmias. Mechanical dispersion by speckle tracking echocardiography is associated with NSVT on 24-h ambulatory ECG monitoring in patients with hypertrophic cardiomyopathy.
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Affiliation(s)
- Mikko Jalanko
- a Department of Cardiology , Helsinki University Hospital, Heart and Lung Center , Helsinki , Finland
| | - Mika Tarkiainen
- b Department of Clinical Radiology , Kuopio University Hospital , Kuopio , Finland
| | - Petri Sipola
- b Department of Clinical Radiology , Kuopio University Hospital , Kuopio , Finland
| | | | - Kirsi Lauerma
- d HUS Medical Imaging Center, Radiology , University of Helsinki and Helsinki University Hospital , Helsinki , Finland
| | - Mika Laine
- a Department of Cardiology , Helsinki University Hospital, Heart and Lung Center , Helsinki , Finland
| | - Markku S Nieminen
- a Department of Cardiology , Helsinki University Hospital, Heart and Lung Center , Helsinki , Finland
| | - Markku Laakso
- e Institute of Clinical Medicine, Internal Medicine and Kuopio University Hospital , Kuopio , Finland
| | - Tiina Heliö
- a Department of Cardiology , Helsinki University Hospital, Heart and Lung Center , Helsinki , Finland
| | - Johanna Kuusisto
- e Institute of Clinical Medicine, Internal Medicine and Kuopio University Hospital , Kuopio , Finland
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Klopotowski M, Kukula K, Malek LA, Spiewak M, Polanska-Skrzypczyk M, Jamiolkowski J, Dabrowski M, Baranowski R, Klisiewicz A, Kusmierczyk M, Jasinska A, Jarmus E, Kruk M, Ruzyllo W, Witkowski A, Chojnowska L. The value of cardiac magnetic resonance and distribution of late gadolinium enhancement for risk stratification of sudden cardiac death in patients with hypertrophic cardiomyopathy. J Cardiol 2016; 68:49-56. [DOI: 10.1016/j.jjcc.2015.07.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 07/09/2015] [Accepted: 07/27/2015] [Indexed: 01/16/2023]
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Baumert M, Porta A, Vos MA, Malik M, Couderc JP, Laguna P, Piccirillo G, Smith GL, Tereshchenko LG, Volders PGA. QT interval variability in body surface ECG: measurement, physiological basis, and clinical value: position statement and consensus guidance endorsed by the European Heart Rhythm Association jointly with the ESC Working Group on Cardiac Cellular Electrophysiology. Europace 2016; 18:925-44. [PMID: 26823389 PMCID: PMC4905605 DOI: 10.1093/europace/euv405] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 11/05/2015] [Indexed: 12/20/2022] Open
Abstract
This consensus guideline discusses the electrocardiographic phenomenon of beat-to-beat QT interval variability (QTV) on surface electrocardiograms. The text covers measurement principles, physiological basis, and clinical value of QTV. Technical considerations include QT interval measurement and the relation between QTV and heart rate variability. Research frontiers of QTV include understanding of QTV physiology, systematic evaluation of the link between QTV and direct measures of neural activity, modelling of the QTV dependence on the variability of other physiological variables, distinction between QTV and general T wave shape variability, and assessing of the QTV utility for guiding therapy. Increased QTV appears to be a risk marker of arrhythmic and cardiovascular death. It remains to be established whether it can guide therapy alone or in combination with other risk factors. QT interval variability has a possible role in non-invasive assessment of tonic sympathetic activity.
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Affiliation(s)
- Mathias Baumert
- School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA, Australia
| | - Alberto Porta
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCCS Policlinico San Donato, Milan, Italy
| | - Marc A Vos
- Department of Medical Physiology, Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marek Malik
- St Paul's Cardiac Electrophysiology, University of London, and National Heart and Lung Institute, Imperial College, Dovehouse Street, London SW3 6LY, UK
| | - Jean-Philippe Couderc
- Heart Research Follow-Up Program, University of Rochester Medical Center, Rochester, NY, USA
| | - Pablo Laguna
- Zaragoza University and CIBER-BBN, Zaragoza, Spain
| | - Gianfranco Piccirillo
- Dipartimento di Scienze Cardiovascolari, Respiratorie, Nefrologiche, Anestesiologiche e Geriatriche, Università 'La Sapienza' Rome, Rome, Italy
| | - Godfrey L Smith
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - Larisa G Tereshchenko
- Oregon Health and Science University, Knight Cardiovascular Institute, Portland, OR, USA
| | - Paul G A Volders
- Department of Cardiology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Centre, Maastricht, The Netherlands
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Magrì D, Re F, Limongelli G, Agostoni P, Zachara E, Correale M, Mastromarino V, Santolamazza C, Casenghi M, Pacileo G, Valente F, Morosin M, Musumeci B, Pagannone E, Maruotti A, Uguccioni M, Volpe M, Autore C. Heart Failure Progression in Hypertrophic Cardiomyopathy – Possible Insights From Cardiopulmonary Exercise Testing –. Circ J 2016; 80:2204-11. [DOI: 10.1253/circj.cj-16-0432] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Damiano Magrì
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
| | - Federica Re
- Cardiology Division, Cardiac Arrhythmia Center and Cardiomyopathies Unit, San Camillo–Forlanini Hospital
| | | | - Piergiuseppe Agostoni
- “Monzino” Cardiologic Center, IRCCS
- Department of Clinical Sciences and Community Health, University of Milan
| | - Elisabetta Zachara
- Cardiology Division, Cardiac Arrhythmia Center and Cardiomyopathies Unit, San Camillo–Forlanini Hospital
| | | | | | | | - Matteo Casenghi
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
| | | | - Fabio Valente
- Cardiology SUN, Monaldi Hospital, II University of Naples
| | - Marco Morosin
- “Monzino” Cardiologic Center, IRCCS
- Cardiovascular Department, “Ospedali Riuniti” Trieste and Postgraduate School Cardiovascular Sciences, University of Trieste
| | - Beatrice Musumeci
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
| | - Erika Pagannone
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
| | - Antonello Maruotti
- Department of Economic, Political Sciences and Modern Languages “Libera Università-SS Maria Assunta”
- Centre for Innovation and Leadership in Health Sciences, University of Southampton
| | - Massimo Uguccioni
- Cardiology Division, Cardiac Arrhythmia Center and Cardiomyopathies Unit, San Camillo–Forlanini Hospital
| | - Massimo Volpe
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
- IRCCS–Neuromed
| | - Camillo Autore
- Department of Clinical and Molecular Medicine, University of Rome “La Sapienza”
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7
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Hamada M, Shigematsu Y, Ohtani T, Ikeda S. Elevated Cardiac Enzymes in Hypertrophic Cardiomyopathy Patients With Heart Failure - A 20-Year Prospective Follow-up Study. Circ J 2015; 80:218-26. [PMID: 26549004 DOI: 10.1253/circj.cj-15-0872] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND To better understand the evolution of typical hypertrophic cardiomyopathy (HCM) to heart failure (HF), we investigated the relationship between serum biochemical abnormalities and changes in left ventricular (LV) remodeling. METHODS AND RESULTS Seventy-seven HCM patients were followed for 20 years. Creatine kinase (CK), CK-MB, lactate dehydrogenase (LDH), LDH-1, troponin T and myosin light chain-1 (MLC-1) were measured. Abnormal CK-MB elevation was observed in 64% of HCM patients. LDH-1 was not significantly different compared with the control subjects. Troponin T elevation was observed in 3 HCM patients and MLC-1 elevation was not observed. According to median CK-MB, HCM patients were divided into 2 groups: group H (CK-MB ≥2.5%, n=33) and group L (CK-MB <2.5%, n=44). During the follow-up period in group H, LV end-diastolic dimension increased (P<0.0001), fractional shortening decreased (P<0.0004), and left atrial dimension increased (P<0.0001). The markers reflecting LV hypertrophy were significantly decreased. In group L, LV end-diastolic dimension increased (P<0.02) and left atrial dimension increased (P<0.0001). HF was observed in 18 patients in group H and in 4 in group L. There were 14 HF deaths in group H and 2 in group L, and 3 sudden cardiac deaths in group H. CONCLUSIONS Persistent elevation of cardiac enzymes in HCM patients indicates ongoing myocardial injury, ultimately resulting in death by HF.
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Varga-Szemes A, Muscogiuri G, Schoepf UJ, De Cecco CN, Wichmann JL, Mangold S, Caruso D, Fuller SR, Spottiswoode BS, van der Geest RJ, Suranyi P. Overview of Myocardial T1 Mapping Applications. CURRENT RADIOLOGY REPORTS 2015. [DOI: 10.1007/s40134-015-0114-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Orosz A, Baczkó I, Nagy V, Gavallér H, Csanády M, Forster T, Papp JG, Varró A, Lengyel C, Sepp R. Short-term beat-to-beat variability of the QT interval is increased and correlates with parameters of left ventricular hypertrophy in patients with hypertrophic cardiomyopathy. Can J Physiol Pharmacol 2015; 93:765-72. [DOI: 10.1139/cjpp-2014-0526] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Stratification models for the prediction of sudden cardiac death (SCD) are inappropriate in patients with hypertrophic cardiomyopathy (HCM). We investigated conventional electrocardiogram (ECG) repolarization parameters and the beat-to-beat short-term QT interval variability (QT-STV), a new parameter of proarrhythmic risk, in 37 patients with HCM (21 males, average age 48 ± 15 years). Resting ECGs were recorded for 5 min and the frequency corrected QT interval (QTc), QT dispersion (QTd), beat-to-beat short-term variability of QT interval (QT-STV), and the duration of terminal part of T waves (Tpeak–Tend) were calculated. While all repolarization parameters were significantly increased in patients with HCM compared with the controls (QTc, 488 ± 61 vs. 434 ± 23 ms, p < 0.0001; QT-STV, 4.5 ± 2 vs. 3.2 ± 1 ms, p = 0.0002; Tpeak–Tend duration, 107 ± 27 vs. 91 ± 10 ms, p = 0.0015; QTd, 47 ± 17 vs. 34 ± 9 ms, p = 0.0002), QT-STV had the highest relative increase (+41%). QT-STV also showed the best correlation with indices of left ventricular (LV) hypertrophy, i.e., maximal LV wall thickness normalized for body surface area (BSA; r = 0.461, p = 0.004) or LV mass (determined by cardiac magnetic resonance imaging) normalized for BSA (r = 0.455, p = 0.015). In summary, beat-to-beat QT-STV showed the most marked increase in patients with HCM and may represent a novel marker that merits further testing for increased SCD risk in HCM.
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Affiliation(s)
- Andrea Orosz
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary
| | - István Baczkó
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary
| | - Viktória Nagy
- Second Department of Internal Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Korányi fasor 6, 6720 Szeged, Hungary
| | - Henriette Gavallér
- Second Department of Internal Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Korányi fasor 6, 6720 Szeged, Hungary
- Diagnoscan Hungary Ltd., Semmelweis utca 6, 6725 Szeged, Hungary
| | - Miklós Csanády
- Second Department of Internal Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Korányi fasor 6, 6720 Szeged, Hungary
| | - Tamás Forster
- Second Department of Internal Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Korányi fasor 6, 6720 Szeged, Hungary
| | - Julius Gy. Papp
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary
- MTA-SZTE Research Group of Cardiovascular Pharmacology, Hungarian Academy of Sciences, Szeged, Hungary
| | - András Varró
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary
- MTA-SZTE Research Group of Cardiovascular Pharmacology, Hungarian Academy of Sciences, Szeged, Hungary
| | - Csaba Lengyel
- First Department of Internal Medicine, University of Szeged, Hungary
| | - Róbert Sepp
- Second Department of Internal Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Korányi fasor 6, 6720 Szeged, Hungary
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Magrì D, Piccirillo G, Ricotta A, De Cecco CN, Mastromarino V, Serdoz A, Muscogiuri G, Gregori M, Casenghi M, Cauti FM, Oliviero G, Musumeci MB, Maruotti A, Autore C. Spatial QT Dispersion Predicts Nonsustained Ventricular Tachycardia and Correlates with Confined Systodiastolic Dysfunction in Hypertrophic Cardiomyopathy. Cardiology 2015; 131:122-9. [DOI: 10.1159/000377622] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 01/28/2015] [Indexed: 11/19/2022]
Abstract
Objectives: An increased dispersion of myocardial repolarization represents one of the mechanisms underlying the arrhythmic risk in hypertrophic cardiomyopathy (HCM). We investigated spatial myocardial repolarization dispersion indices in HCM patients with nonsustained ventricular tachycardia (NSVT) and, contextually, their main clinical determinants. Methods: Fifty-two well-matched HCM outpatients were categorized into two groups according to the presence or the absence of NSVT at 24-hour Holter electrocardiogram (ECG) monitoring. Each patient underwent a clinical examination, including Doppler echocardiogram integrated with tissue Doppler imaging, cardiac magnetic resonance, and 12-lead surface ECG to calculate the dispersion for the following intervals: QRS, Q-Tend (QTe), Q-Tpeak, Tpeak-Tend (TpTe), J-Tpeak, and J-Tend. Results: The NSVT group showed only QTe dispersion and TpTe dispersion values to be significantly higher than their counterparts. NSVT occurrence was independently predicted by late gadolinium enhancement presence (p = 0.021) and QTe Bazett dispersion (p = 0.030), the latter strongly associated with the myocardial performance index (MPI) obtained at the basal segment of the interventricular septum (p = 0.0004). Conclusion: Our data support QTe dispersion as an easy and noninvasive tool for identifying HCM patients with NSVT propensity. The strong relationship between QTe dispersion and MPI allows us to hypothesize an intriguing link between electrical instability and confined myocardial areas of systodiastolic dysfunction.
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