text: <unk>  is any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart. The heart beat may be too fast or too slow, and may be regular or irregular. A heart beat that is too fast is<unk> lled tachycardia and a heartbeat that is too slow is<unk> lled bradycardia. Although many<unk> s are not life-threatening, some<unk> n<unk> use<unk> rdiac arrest.
option_0: Cardiac arrhythmia
option_1: Atrial infarction
option_2: Sinus arrhythmia
option_3: Atrial fibrillation
option_4: Pacemaker mediated tachycardia
option_5: Supraventricular tachycardia
option_6: Ventricular tachycardia
option_7: Torsades de pointes