A 78-year-old man with a history of heart failure presents for routine follow-up 1 week after insertion of a pacemaker. As part of the evaluation, a 12-lead ECG is obtained. The correct diagnosis is ...

The rhythm is regular at a rate of 120 beats/min. A pacemaker stimulus occurs before each QRS complex (→). This is ventricular pacing. Because the pacing rate is 120 beats/min, the mode of pacing must ...

When a heart patient with an implanted pacemakerundergoes electrocardiogram testing,the cardiologist must be able to detect thepresence and effects of the pacemaker (seesidebar, “When the heart’s ...

If the ventricular pacing is originating in the right ventricle like a normal pacemaker, a left bundle branch morphology will be present. This occurs since the right ventricle is activated first and ...

The nitric oxide-independent soluble guanylate cyclase activator ataciguat continued to show promise for slowing the progression of fibrocalcific aortic valve stenosis in phase I and II studies.

The cardiac pacemaker harmlessly dissolves over the course of 35 days. (Courtesy: Northwestern University) Temporary cardiac pacemakers provide essential pacing for patients with short-term heart ...

This ECG shows ventricular pacing. Note the pacer spike prior to each QRS complex, most apparent in leads V5 and V6. The P waves appear sinus in origin and have no association with the QRS complexes ...