Cardiac-resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure with a wide QRS complex. Mechanical dyssynchrony also occurs in patients with a narrow QRS ...

Three arrhythmias are seen with bypass tracts: a narrow regular QRS complex (orthodromic; conduction down the atrioventricular node and retrograde conduction through the bypass tract), a wide ...

There are narrow and wide QRS complexes with a repeating pattern of two narrow QRS complexes, three wide QRS complexes, and a narrow QRS complex followed by a single wide QRS complex. The first ...

December 22, 2006 (Washington, DC) - A wide QRS interval as an electrocardiographic marker for ventricular dyssynchrony is typically a prerequisite for cardiac resynchronization therapy (CRT) in ...

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 ...

The Echocardiography Guided Cardiac Resynchronization Therapy (EchoCRT) study showed CRT, a standard of care in heart failure patients with a wide QRS, is not beneficial in patients with heart ...

Unlike premature atrial contractions, or PACs, usually narrow-complexed because they use the normal ventricular conduction system (unless a baseline right or left bundle branch block is present).

Death from any cause occurred in seven (11%) of those randomized to atrioventricular (AV) junction ablation plus cardiac resynchronization therapy (CRT) compared with 20 (29%) on rate control ...