This ECG displays an accelerated idioventricular rhythm. This has a left bundle branch block pattern and is a good example of the AV dissociation that occurs. Now, look at the rhythm strip at the ...

With the faster heart rate, the QRS complex morphology changes to that of a LBBB. As sinus rhythm restores, and the ventricular rate slows, the QRS morphology returns to normal. The Sgarbossa ...

The QRS rate for junctional rhythms is typically less than 100 beats/min, and the QRS complex usually narrow unless the baseline QRS has a bundle branch block. Sinus rhythm resumes with increased ...

“We demonstrate LBB pacing [provides] a greater electrical and mechanical and echocardiographic improvement than BiV pacing in heart failure patients with LBBB [left bundle branch block], and it is ...

Longer monitoring may reveal more patients with escape rhythm that may be defined as nondependent ... surgery include those with preexisting LBBB, and those undergoing aortic valve replacement.