Atrial fibrillation (AF) with rapid ventricular rate >120 beats per minute (bpm), Sustained or non-sustained ventricular tachycardia (VT), Second-degree heat block Mobitz type II and third degree heart block (unless pacemaker or defibrillator has been implanted, or; QT interval corrected for heart rate per Friderica formula (QTcF) >=500 milliseconds (msec) in subjects with QRS <120 msec and QTcF >=530 msec in subjects with QRS >=120 msec.