Right and left ventricular mass development in early infancy: Correlation of electrocardiographic changes with echocardiographic measurements.

ABSTRACT:

Background

Right ventricular mass indexed to body surface area (RVMI) decreases and left ventricular mass index (LVMI) increases rapidly and substantially during early infancy. The relationship between these sizeable mass transformations and simultaneous electrocardiographic changes have not been previously delineated.

Methods

Normal term infants (#45 initially enrolled) were prospectively evaluated at 2 days and at 2-week, 2-month, and 4-month clinic visits. Ventricular masses were estimated with 2D echocardiographic methods. QRS voltages were measured in leads V₁, V₆, I and aVF.

Results

Mean QRS axis shifted from 135 (95%CI 124, 146) to 65 degrees (95%CI 49, 81) and correlated with both RVMI decrease and LVMI increase (R = 0.46^⁎ vs.

SUBMITTER: Joyce JJ 

PROVIDER: S-EPMC10843504 | biostudies-literature | 2023 Nov-Dec

REPOSITORIES: biostudies-literature