Cardiac Resynchronization Therapy in Patients With Class I–II Heart Failure and a Wide QRS

Heart Rate Variability Today

“…Cardiac resynchronization therapy (CRT) is emerging as a long-term therapy that favorably impacts functional capacity in heart failure patients. [114][115][116][117] An improvement in cardiac performance from CRT positively alters the autonomic control of heart rate and beta blocker therapy seems to potentiate the autonomic improvement with CRT. 118 Moreover, CRT appears to increase baroreflex sensitivity by 35% (from 2.96 to 3.79 ms/mmHg).…”

Ventricular Arrhythmias in Patients With Implanted Defibrillators

“…4 The most common cardiac adverse effect of amiodarone is bradycardia, which has the potential to impair ventricular function by increasing ventricular pacing from the ICD in patients who do not otherwise require pacing. 23 For patients with monomorphic VT, catheter ablation is often an option. In multicenter trials, catheter ablation reduces VT recurrences in over two thirds of patients with recurrent drug-refractory VT due to a previous myocardial infarction.…”