Table 4.

Correlation between QT and P-wave dispersion and different studied variables in studied groups.

Variables	QTd		PWD
	r	p	r	p
MPAP	0.731	0.001*	0.498	0.02*
LVEDD	0.073	0.760	0.194	0.413
LVESD	0.104	0.663	0.017	0.944
RVD	0.825	0.001*	0.498	0.02*
EF	0.072	0.763	0.374	0.104
PVR	0.305	0.001*	0.291	0.001*
SVR	0.154	0.517	0.054	0.820
PVR/SVR	0.944	0.001*	0.708	0.001*

EF = ejection fraction; LVEDD = left ventricular end diastolic diameter; LVESD = left ventricular end systolic diameter; MPAP = mean pulmonary artery pressure; PVR = pulmonary vascular resistance; PWD = P-wave dispersion; QTd = QT dispersion; RVD = right ventricular diameter; SVR = systemic vascular resistance.

^*means significant.