Ventricular Tachycardia Clinical Trials

This study is being done to determine whether there is an increase in sympathetic nerve activity before the onset of ventricular arrhythmias or irregular heartbeat rhythm. In addition, this study is looking at the relationship between sympathetic nerve activity and how patients with ventricular arrhythmias respond to catheter ablation treatment. Read Less

Individuals with repaired Tetralogy of Fallot (rTOF) remain at risk for sudden cardiac death from ventricular tachycardia (VT). Transcatheter pulmonary valve replacement (TPVR) indications continue to broaden, yet its capability to reduce the risk of VT and sudden cardiac death remains unknown. Thus, in a cohort of participants with rTOF who are presenting for TPVR the investigators intend to: (1) quantify and localize right ventricular (RV) isthmuses with abnormal voltage and/or conduction velocity; (2) identify which RV isthmuses are at risk of being "jailed" by TPV prostheses; and (3) explore the feasibility of omnipolar technology to characterize wavefront directionality and differentiate slow conduction from conduction block. Read Less

Ventricular tachycardia and ventricular fibrillation (VT/VF) are the most common causes of sudden cardiac death in patients with diseased hearts. The factors contributing to these deadly arrhythmias are not well understood. The presence of a wide variety of microbial flora in the human GI tract, particularly colon has been well recognized for a long time. There are also emerging links showing the effect of an intact gut microbiome having effects on left ventricular remodeling after myocardial infarction and hypertension. Gut microbiota has also been associated with outcomes in atrial fibrillation. There is little available in current literature showing a relationship between gut microbiome characteristics and ventricular arrhythmia burden. The gut microbiome has particularly strong interactions with neuroendocrine and immunologic mediators and has effects on the modulation of the autonomic nervous system. These systems are also hypothesized to influence ventricular arrhythmias. The investigators propose to study the relation and interaction between gut microbiome and ventricular arrhythmogenesis. Read Less