Determinants and Regression Equations for the Calculation of Scores of Left Ventricular Tissue Doppler Longitudinal Indexes in a Healthy Italian Pediatric Population

Table 2

Univariable relationships of tissue Doppler indexes with clinical and echocardiographic variables in the study population. Values were computed by considering the average of velocities taken at the septal and lateral site.

	Average		Average		Average		Average
Age	0.49	<0.0001	0.40	<0.0001	−0.20	<0.0001	−0.43	<0.0001
Body mass index	0.15	0.0044	0.04	0.50	0.01	0.89	−0.05	0.37
Body surface area	0.49	<0.0001	0.37	<0.0001	−0.20	<0.0001	−0.41	<0.0001
Systolic blood pressure	0.38	<0.0001	0.21	<0.0001	0.04	0.47	−0.23	<0.0001
Diastolic blood pressure	0.29	<0.0001	0.19	0.0003	−0.03	0.55	−0.26	<0.0001
Heart rate	−0.17	0.0014	−0.31	<0.0001	0.35	<0.0001	0.35	<0.0001
LV end-diastolic volume	0.43	<0.0001	0.34	<0.0001	−0.19	0.0002	−0.33	<0.0001
Indexed LV end-diastolic volume	0.11	0.0030	0.13	0.15	−0.08	0.11	−0.05	0.31
LV end-systolic volume	0.37	<0.0001	0.28	<0.0001	0.28	<0.0001	−0.32	<0.0001
Indexed LV end-systolic volume	0.04	0.40	0.06	0.22	−0.07	0.16	−0.05	0.37
LV mass	0.48	<0.0001	0.33	<0.0001	−0.14	0.0075	−0.33	<0.0001
Indexed LV mass	0.27	<0.0001	0.14	0.0056	−0.03	0.57	−0.10	0.066
Ejection fraction	0.13	0.011	0.11	0.029	0.04	0.45	−0.04	0.47
Left atrial volume	0.41	<0.0001	0.34	<0.0001	−0.13	0.011	−0.32	<0.0001
Indexed left atrial volume	0.04	0.45	0.08	0.13	0.02	0.65	−0.03	0.61
Mitral ratio	0.03	0.56	0.28	<0.0001	−0.30	<0.0001	−0.07	0.15
Deceleration time	0.23	<0.0001	0.22	<0.0001	−0.14	0.010	−0.19	0.0004
TAPSE	0.31	<0.0001	0.23	<0.0001	−0.01	0.77	−0.10	0.047
Tricuspid	0.36	<0.0001	0.19	0.0003	0.11	0.036	−0.06	0.24

: peak late diastolic transmitral flow velocity; : peak late diastolic mitral annulus velocity; : peak early diastolic transmitral flow velocity; : peak early diastolic mitral annulus velocity; LV: left ventricular; : peak systolic mitral annulus velocity; TAPSE: tricuspid annulus plane systolic excursion.