supraventricular extrasystoles ( se , 11.55 % ) , atrial fibrillation ( af , 10.44 % ) and ventricular extrasystoles ( ve , 8.91 % ) were the most frequent arrhythmias , followed by sinus bradycardia ( sb , 2.04 % ) , sinus arrhythmia ( sa , 1.35 % ) , atrial flutter ( afl , 1.09 % ) and junctional rhythms ( jr , 0.20 % ) .
C0003811
arrhythmias
C0003813
sinus arrhythmia