Combination of Left Ventricular End-Diastolic Diameter and QRS Duration Strongly Predicts Good Response to and Prognosis of Cardiac Resynchronization Therapy

Table 2

Changes in echocardiography and electrocardiogram from baseline to 6 months in two groups.

Variables	Responders ()	Nonresponders ()	value
Change in LVEF	12 (8–20)	2 [(−4)–4]	< 0.001
Change in LAD	−3.2 [(−6)–0]	−3.5 [(−7)–1.5]	0.649
Change in LVEDD	−6 [(−15)–(−2)]	0 [(−3.5)–4.5]	< 0.001
Change in MR	−4.5 [(−7.2)–(−1.6)]	−2.1 [(−5.1)–2.2]	0.008
Change in QRS duration	−34.13 ± 25.69	−19.26 ± 24.81	0.009

LVEF: left ventricular ejection fraction; LAD: left atrial dimension; LVEDD: left ventricular end-diastolic dimension; MR: mitral regurgitation.