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

Table 1

Main clinical and echocardiographic characteristics of the study population.

Age (years)	6.4 ± 1.1
Female gender (%)	181 (49.1%)
Weight (kg)	26.0 ± 14.6
Height (m)	117.6 ± 27.2
Body mass index (kg/m^2)	17.5 ± 3.6
Body surface area (m^2)	0.91 ± 0.36
Systolic blood pressure (mmHg)	99.0 ± 9.3
Diastolic blood pressure (mmHg)	61.9 ± 6.7
Heart rate (bpm)	94.0 ± 20.1
Indexed LV end-diastolic volume (mL/m^2)	53.4 ± 13.2
Indexed LV end-systolic volume (mL/m^2)	19.3 ± 6.0
Ejection fraction (%)	63.9 ± 4.7
Indexed LV mass (g/m^2)	62.0 ± 13.8
wave (cm/s)	94.2 ± 13.8
wave (cm/s)	51.0 ± 15.4
ratio	2.0 ± 0.6
Deceleration time (ms)	141.1 ± 33.6
Indexed LA volume (mL/m^2)	19.4 ± 5.5
Septal (cm/s)	7.9 ± 1.1
Septal (cm/s)	13.1 ± 2.0
Septal (cm/s)	6.5 ± 1.5
Septal ratio	2.1 ± 0.6
Septal ratio	7.3 ± 1.6
Lateral (cm/s)	9.7 ± 2.3
Lateral (cm/s)	17.1 ± 3.1
Lateral (cm/s)	6.9 ± 1.7
Lateral ratio	2.6 ± 0.8
Lateral ratio	5.7 ± 1.4
Average (cm/s)	8.8 ± 1.5
Average (cm/s)	15.1 ± 2.1
Average (cm/s)	6.7 ± 1.4
Average ratio	2.3 ± 0.6
Average ratio	6.3 ± 1.3

: 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.