Biventricular pacing is an excellent option ... Left ventricular ejection fraction < 35%, a QRS duration of > 120 ms and New York Heart Association (NYHA) functional class III or IV with optimal ...

When atrial fibrillation is present with systolic heart failure, AV node ablation may be required for a biventricular pacemaker to work efficiencly. The QRS complex occurs at random intervals ...

and complete heart block was implanted with a St. Jude Atlas-II HF biventricular implantable cardioverter defibrillator (BiV ICD; St. Jude Medical, St. Paul, MN, USA), with a Guidant 0158 ...