Cardiac ventricular geometry and function in the growth-retarded fetus

Area of Science:

• Obstetrics and Gynecology
• Fetal Medicine
• Cardiology

Background:

• Fetal growth retardation (FGR) poses significant risks to pregnancy outcomes.
• Accurate assessment of fetal well-being in FGR is crucial for timely intervention.
• M-mode echocardiography is a non-invasive tool for evaluating fetal cardiac function.

Purpose of the Study:

• To investigate the utility of M-mode assessment of fetal cardiac ventricles in pregnancies complicated by FGR.
• To determine if ventricular geometry and function provide additional prognostic information beyond fetal heart rate patterns.
• To explore the relationship between cardiac output and fetal growth in FGR.

Main Methods:

• M-mode recordings of fetal cardiac ventricles were obtained from 15 pregnant women with FGR.
• Pregnancy duration ranged from 28 to 40 weeks of gestation.
• Analysis focused on ventricular geometry, function, and left ventricular output in relation to fetal weight.

Main Results:

• M-mode assessment of ventricular geometry and function did not offer additional insights into fetal condition when fetal heart rate patterns were normal.
• A significant correlation was observed between left ventricular output and estimated fetal weight.
• This suggests cardiac output may be a more sensitive indicator of growth status than ventricular morphology in FGR.

Conclusions:

• Standard M-mode evaluation of fetal ventricular structure and function offers limited added value in FGR cases with normal fetal heart rates.
• Left ventricular output demonstrates a strong association with fetal weight, highlighting its potential as a key parameter for monitoring fetal growth.
• Further research should focus on the role of cardiac output measurements in managing FGR pregnancies.