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Int J Cardiol ; 266: 133-135, 2018 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-29699857


OBJECTIVES: To identify the frequency and significance of notched T-waves (NTW) in elite endurance athletes. METHODS: Professional cyclists were followed for 4 years with a clinical, electrocardiographic and echocardiographic assessment. Electrocardiograms were classified according to the presence or absence of NTWs; clinical and echocardiographic correlates were assessed. RESULTS: 42 Caucasian male cyclists were included. NTW were detected in 8 (19%) cyclists who showed significantly longer QT (461 ±â€¯15 vs 422 ±â€¯33 ms, p < 0.01) and QTc intervals (434 ±â€¯19 vs 383 ±â€¯21 ms, p < 0.01), a larger left ventricular end-diastolic volume (163 ±â€¯27 vs 137 ±â€¯23 mL, p = 0.014), end-diastolic volume index (84 ±â€¯13 vs 73 ±â€¯11 mL, p = 0.037) and end-diastolic apex-to-base length (9.9 ±â€¯0.7 vs 9.3 ±â€¯0.5 mm. p = 0.035). There were no detected arrhythmic events, and echocardiography did not reveal any abnormalities. CONCLUSIONS: This is to our knowledge the first study reporting a high prevalence of NTW in athletes. In our small cohort of cyclists NTW were associated with QT interval prolongation and left ventricular changes. This may be indicative of underlying inhomogeneity of repolarisation. Expanding on this research could reveal a role for NTW in identifying ventricular morphological changes.

Echocardiography ; 34(1): 139-140, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27785831


To our knowledge, we describe the first case of a pseudoaneurysm of the mitro-aortic intervalvular fibrosa fistulizing into both atria, following an aortic bacterial endocarditis and valve replacement.

Falso Aneurisma/diagnóstico , Ecocardiografia Transesofagiana/métodos , Endocardite Bacteriana/complicações , Aneurisma Cardíaco/diagnóstico , Átrios do Coração , Imagem Multimodal/métodos , Tomografia Computadorizada por Raios X/métodos , Adulto , Diagnóstico Diferencial , Aneurisma Cardíaco/etiologia , Humanos , Masculino
Indian Pacing Electrophysiol J ; 16(5): 152-156, 2016 Sep - Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27979373


PURPOSE: The aim of the present study was to define the atrial electrical substrate in patients with paroxysmal atrial fibrillation (AF) occurring in the absence of overt structural heart disease and to assess if electrophysiological parameters could predict AF recurrence after radiofrequency ablation in this population. METHODS AND RESULTS: 45 consecutive patients (39 male, age 59 ± 10 years) with paroxysmal AF and without overt structural heart disease, referred for radiofrequency catheter ablation, were prospectively enrolled. A cohort of 12 age-matched patients without a history of AF, served as a control group. Atrial electrical substrate was assessed by P-wave signal-averaging, intracardiac conduction delays and refractory periods. Total P wave duration during signal-averaging was longer in patients with paroxysmal AF than in controls (140 ± 19 ms vs 123 ± 13 ms, p = 0.004). Patients with paroxysmal AF showed an increase in right intra-atrial (40.2 ± 11.3 ms vs 31.7 ± 11.8 ms, p = 0.02) and inter-atrial conduction delays (87.93 ± 22.0 ms vs 65.3 ± 15.6 ms, p = 0.001) in sinus rhythm. Refractory periods in the right atrium were longer in patients with paroxysmal AF (265 ± 44 ms vs 222 ± 32 ms, p = 0.002). After ablation, 22 patients had AF recurrence but showed no differences in electrophysiological parameters compared to patients without recurrence. CONCLUSION: Electrophysiological abnormalities are present in patients with paroxysmal AF without overt structural heart disease. Neither signal-averaged P-wave duration nor intracardiac atrial electrophysiology could predict arrhythmia recurrence after pulmonary vein isolation.

Rev Port Cardiol ; 34(3): 211.e1-3, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25707735


We report the case of a young man who accidentally received a prolonged electric discharge from electrical wires and released the electric source with the help of an inappropriate shock from his implantable cardioverter-defibrillator (ICD), after misinterpretation of the electrical signal by the device as a ventricular tachycardia. This case illustrates the "electrical noise" phenomenon, and underscores the need for precautions for patients with an ICD and their physicians.

Desfibriladores Implantáveis , Adulto , Eletricidade/efeitos adversos , Humanos , Masculino , Falha de Prótese