This article appears in the following Europace issue: Spotlight Issue: Cardiac Resynchronization Therapy [View the issue table of contents]
Cardiac resynchronization therapy in heart failure patients with atrial fibrillation
1 IRCCS Istituto Clinico Humanitas, Via Manzoni 56, Rozzano/Milano, Italy; 2 Division of Cardiology, Cardiocentro Ticino, Lugano, Switzerland
Cardiac resynchronization therapy (CRT) is an important device-based, non-pharmacological approach that has shown, in large randomized trials, to improve left ventricular (LV) function and reduce both morbidity and mortality rates in selected patients affected by advanced heart failure (HF): New York Heart Association (NYHA) functional class III–IV, reduced LV systolic function with an ejection fraction (EF)
35%, QRS duration
120 ms, on optimal medical therapy, and who were in sinus rhythm. For the first time, the latest ESC and AHA/ACC/HRS Guidelines have considered atrial fibrillation (AF) patients, who constitute an important subgroup of HF patients, as eligible to receive CRT. Nevertheless, these Guidelines did not include a strategy for defining differentiated approaches according to AF duration or burden. In this review, the authors explain in which way AF may interfere with adequate CRT delivery, how to manage different AF burden, and finally present a brief overview on the effects of CRT in AF patients.
Key Words: Atrial fibrillation, Heart failure, Resynchronization, Defibrillators, Ablation
* Corresponding author. Tel: +39 02 8224 4622, Fax: +39 02 8224 4693, Email: maurizio.gasparini{at}humanitas.it