Publications by authors named "Bernard Belhassen"
Article Synopsis
- * AAs were the first symptom of IAS in 52% of patients, and nearly a quarter had multiple AAs documented.
- * The study found a moderate incidence of severe outcomes, including a yearly primary endpoint rate of 1.4%, with younger patients experiencing higher risks and other complications affecting some patients as well.
Article Synopsis
- - A 37-year-old male athlete experienced abnormal heart rhythms during exercise, but no prior structural heart disease was found.
- - Tests revealed that invasive programmed ventricular stimulation triggered ventricular fibrillation, and a mutation in the CASQ2 gene was identified.
- - This case suggests that individuals with CASQ2-related polymorphic ventricular tachycardia may have heightened ventricular excitability during such stimulation.
Article Synopsis
- - The text discusses Calcium Release Deficiency Syndrome (CRDS), a serious genetic heart condition that can cause sudden cardiac arrest without clear reasons and is not detectable through standard tests.
- - The study aimed to analyze electrocardiogram (ECG) responses after brief periods of fast heart rates followed by pauses in order to develop a diagnostic test for CRDS.
- - Findings showed that patients with CRDS had a significantly greater change in T-wave amplitude on their ECG after a pause compared to control groups, indicating a potential diagnostic marker for this syndrome.
Article Synopsis
- There is limited understanding of how idiopathic ventricular fibrillation (IVF) starts, but previous research suggests that it usually doesn't depend on pauses in heart rhythm.
- The study aimed to investigate the initiation patterns of polymorphic ventricular tachycardia (PVT) in IVF patients, analyzing a total of 410 arrhythmia episodes among 180 patients.
- Results showed that about 27.2% of PVT episodes were pause-dependent, with the majority occurring during normal heart rhythms and initiating PVCs mostly having short coupling intervals (under 350 ms).
Dual atrioventricular nodal non-reentrant tachycardia: an often overlooked diagnosis.
Eur Heart J Case Rep
February 2024
The QRS frontal plane axis changes during left bundle branch block after transcatheter aortic valve replacement.
Pacing Clin Electrophysiol
November 2023
Article Synopsis
- The study examines the impact of left bundle branch block (LBBB) on the QRS frontal plane axis after transcatheter aortic valve replacement (TAVR) in patients with normal baseline QRS duration.
- Out of 720 patients, 141 developed new LBBB post-TAVR, with most experiencing a significant leftward shift in their QRS axis.
- Patients showing a rightward or no axis shift had a higher likelihood of developing high degree atrioventricular block (AVB) compared to those with a leftward shift, indicating a potential risk factor in LBBB post-TAVR.
Article Synopsis
- Diagnosing concealed nodo-ventricular (cNV) and concealed His-ventricular (cHV) pathways in tachyarrhythmias is complex, and the study presents new observations to improve diagnosis.* -
- The research involved seven cases that highlighted key lab tests such as differential ventricular overdrive pacing, responses to specific premature ventricular complexes, and the effects of adenosine on tachycardia identification.* -
- The findings reveal that these concealed pathways can exhibit diverse clinical symptoms, and specific diagnostic techniques can help distinguish between cNV and cHV pathway-mediated arrhythmias.*
Article Synopsis
- The study investigates whether the baseline R-wave amplitude in the V1 ECG lead can predict the risk of high-degree atrioventricular block (AVB) after transcatheter aortic valve replacement (TAVR) in patients with normal QRS duration.
- Out of 720 patients who underwent TAVR, 141 developed left bundle branch block (LBBB), with 14 of those experiencing high-degree AVB requiring pacemaker implantation.
- The findings indicate that a smaller R-wave amplitude in the V1 lead is associated with a higher risk of developing high-degree AVB, suggesting it could be a useful predictor for clinicians.
Article Synopsis
- The study investigates patients with right bundle branch block (RBBB)-ventricular tachycardia (VT) and arrhythmogenic cardiomyopathy (ACM) by examining ECG characteristics of sinus rhythm (SR) and VT.
- It included 70 patients, revealing that the most common sites of origin for the VTs were primarily in the inferior and lateral walls of the left ventricle (LV), with a good correlation to electro-anatomic mapping (EAM) data.
- The findings highlight frequent abnormalities in SR depolarization and repolarization, which are associated with clinical implications in patients with ACM and RBBB-VT.