Tissue Doppler, speckling tracking and four-dimensional echocardiographic assessment of right ventricular function in children with dilated cardiomyopathy

Table 3 Multiple linear regression showing clinical and echocardiographic parameters that were independently associated with the longitudinal strain of the right ventricle among the studied children with dilated cardiomyopathy (n = 50)

Variables	RV LGS (%) among children with dilated cardiomyopathy (n = 50)
	β standardized coefficients	P value
Age (yr)	-0.274	0.057
Duration since diagnosis	0.578	0.0011
Weight (kg)	0.273	0.058
Tricuspid annulus (S) (cm/sec)	0.384	0.0081
RV e´/a´ ratio	0.277	0.059
RV MPI	-0.357	0.011
RV EF (%)	0.119	0.435
TAPSE (mm)	0.670	0.00011

¹Significant (P < 0.05).

RV EF: Right ventricular ejection fraction; LS: Longitudinal strain; MPI: Myocardial performance index; S: systolic velocity by tissue Doppler; TAPSE: Tricuspid annular plane systolic excursion.