PMID: 7082505Jun 1, 1982

M-mode echocardiography in the developing human fetus

British Heart Journal
L D AllanM Tynan

Abstract

The M-mode echocardiogram can be obtained in the developing human fetus from around the 16th week of gestation until term. Errors in interpretation of the M-mode echocardiogram can be avoided by concurrent two dimensional fetal cardiac examination. The pattern of motion of the mitral, tricuspid, aortic, and pulmonary valves and ventricular wall motion can be studied. Motion of the foramen ovale flap, which is characteristic in fetal life, can also be observed. Using the M-mode tracing, measurement data for six variables were made and growth charts constructed. The variables recorded were septal and left ventricular wall thickness, right and left ventricular internal dimension in diastole, aortic root dimension, and left atrial internal dimension. The measurements were made in normal pregnancies where the fetal heart was structurally normal. Confidence limits for each measurement were derived for gestational ages between 16 and 39 weeks.

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Related Concepts

Left Ventricular Structure
Right Atrial Structure
Heart Valves
2D Echocardiography
Fetal Heart
Heart Septum
Ascending Aorta Structure

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