<prompt> Answer this question truthfullyWhat is the relation between antiarrhythmic drugs and congestive heart failure?  <response>: <reason> Class IIa 1. Ivabradine can be beneficial to reduce HF hospitalization for patients with symptomatic NYHA class II-III stable chronic HFrEF LVEF 35 who are receiving GDEM, including a beta blocker at maximum tolerated dose, and who are in sinus rhythm with a heart rate of 70 bpm or greater at rest. Class IIa, Level of Evidence: B-R 