Cited 78 times since 2005 (4.1 per year) source: EuropePMC The American journal of cardiology, Volume 95, Issue 1, 1 1 2005, Pages 140-142 Frequency of left ventricular dyssynchrony in patients with heart failure and a narrow QRS complex. Bleeker GB, Schalij MJ, Molhoek SG, Holman ER, Verwey HF, Steendijk P, van der Wall EE, Bax JJ

Cardiac resynchronization therapy (CRT) is considered a major advance in the treatment of patients with heart failure. The presence of left ventricular (LV) dyssynchrony seems mandatory for a positive response to CRT. Currently, only patients with wide QRS complexes are considered for CRT, although patients with narrow QRS complexes may also have LV dyssynchrony. In the present study, the incidence of LV dyssynchrony was prospectively evaluated in 64 patients with heart failure and narrow QRS complexes using tissue Doppler imaging.

Am J Cardiol. 2005 1;95(1):140-142