Stabilized Rate with Endocardial Vagal Stimulation. Introduction: Recent acute studies demonstrated that atrioventricular (AV) node vagal stimulation during atrial fibrillation (AF) decreases the mean ventricular rate, thus improving hemodynamics. Methods and Results: We report a case of a woman with acute heart failure (HF), chronic AF with untreatable ventricular rapid response, in severe hypotensive state due to a cardiogenic shock. The patient underwent left ventricular (LV) pacemaker implantation and received 50 Hz AV node stimulation, delivered through a posteroseptal atrial lead, thus allowing a 100% pacing. Hemodynamics improvements allowed carvedilol titration; the rate was below 85 bpm after 4 days, then the atrial lead was removed. Conclusions: This novel strategy may allow controlling the rapid AV response in patients undergoing pacemaker implantation. (J Cardiovasc Electrophysiol, Vol. pp. 1[ndash]3) (Source: Journal of Cardiovascular Electrophysiology)

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