Table 4.

Effect of QRS duration on echocardiographically derived parameters

Echocardiographic parameter	QRS duration ≤120 ms	QRS duration >120 ms	p Value
LVESD	4.8 (1.4)	5.5 (1.1)	0.1
LVEDD	5.9 (1.4)	6.8 (0.9)	0.03
LA	3.9 (0.7)	4.2 (0.9)	0.3
IVRT	75 (26)	39 (32)	<0.0001
LVCT	86 (19)	113 (54)	0.03

IVRT, isovolumic relaxation time; LA, left atrial dimension; LVCT, isovolumic left ventricular contraction time; LVEDD, left ventricular end diastolic diameter; LVESD, left ventricular end systolic diameter.