Background Inappropriate sinus tachycardia (IST ... No episodes of severe bradycardia or syncope were reported. After 1 year, patients were asked to stop treatment to reevaluate the situation.

Sinus bradycardia occurs on an ECG when there is a normal upright P wave in lead II ― sinus P wave ― preceding every QRS complex with a ventricular rate of less than 60 beats per minute.

Another important issue related to safety is that no episodes of severe bradycardia or pauses were documented. We present an observational study with a relatively small case series of patients ...