multiple cardiac arrhythmias consisting of multifocal , or unifocal , multiform ventricular ectopic beats , bidirectional tachycardia , complete heart block , accelerated junctional rhythm with exit block , nonparoxysmal junctional tachycardia , atrial fibrillation , atrial tachycardia with block , and multifocal tachycardia were observed .
C0003811
cardiac arrhythmias
C0004238
atrial fibrillation