This wide QRS complex tachycardia has a typical left ... A fusion beat (a.k.a. Dressler beat) can occur during ventricular tachycardia. The sinus node activity (P wave) can begins to conduct ...

A narrow complex tachycardia results with P wave morphologies that are different than normal sinus P waves. The QRS complex can be wide if aberrancy is present (ie, right or left bundle branch ...

Background Inappropriate sinus tachycardia (IST) is characterized by persistent and disproportional elevation of heart rate (HR). Ivabradine has been successfully used in some patients.