text: The cause of<unk>  sinus tachycardia is unknown.  It is a diagnosis of exclusion after all the specific physiological and psychological triggers of sinus tachycardia have been excluded.  The diagnosis of IST is based on the presence of a persistent and recurrent sinus tachycardia on EKG that is otherwise unexplainable.
option_0: Inappropriate sinus tachycardia causes
option_1: Sinoatrial arrest causes
option_2: Supraventricular tachycardia causes
option_3: Accelerated idioventricular rhythm causes
option_4: Third degree AV block causes
option_5: Sinus bradycardia causes
option_6: Sinus tachycardia causes
option_7: Wide complex tachycardia causes