The aortic velocity time integral (VTI) is an echocardiographic tool used to estimate cardiac
output (CO) by multiplying it with the aortic valve (AV) area and heart rate (HR). Inaccurate …

Background The generation of velocity-time integrals (VTIs) from Doppler signals is an
essential component of standard echocardiographic investigations. The most effective …

In previous work, we postulated that mean aortic flow velocity (MAFV) might be a direct
measure of cardiac index. To investigate the assumptions inherent in this relation, we …

BACKGROUND: The objective of this study was to define a simple method of measuring
thoracic aortic pulse-wave velocity (PWV) using only an aortic length regression equation …

Objectives To assess reproducibility and accuracy of left ventricular output (LVO)
quantifications in neonates, when left ventricular outflow tract diameter (LVOTD) was …

Background: A Randomized Controlled Trial (RCT) has been elaborated where goal
directed fluid and hemodynamic therapy (GDFHT) will be realized with trans-thoracic …

Determination of the right ventricular outflow tract velocity time integral (RVOT VTI) is an
important part of the noninvasive investigation of pulmonary blood flow in adults; however …

Background: Knowledge of normal aortic dimensions is important while evaluating children
with aortic root dilatation. Objective: The purpose of the study was to create normal values …

Background Echocardiographic reference intervals (RI s) for left ventricular outflow tract
(LVOT) and velocity time integral (VTI) are scarce in pediatrics. Aims (a) to generate RI s and …

Background: The maximum rate of the ventricular pressure rise (dp/dt max) provides a
reliable measure of ventricular contractility. However, its estimation requires invasive …