Quantitative analysis of cardiac function in non-immunological hydrops fetalis

Area of Science:

• Cardiology
• Fetal Medicine
• Pediatrics

Background:

• Congestive heart failure and cardiogenic hydrops fetalis present significant challenges in fetal assessment.
• Quantitative evaluation of fetal cardiac function is crucial for understanding disease progression and compensation mechanisms.

Purpose of the Study:

• To quantitatively assess fetal cardiac dysfunction in conditions like fetal congestive heart failure and cardiogenic hydrops fetalis.
• To compare cardiac function parameters across different groups of fetal heart conditions and hydrops fetalis.

Main Methods:

• Quantitative evaluation of fetal cardiac function using echocardiography.
• Inclusion of four patient groups: hydrops with structural heart disease, hydrops without heart disease, structural heart disease without hydrops, and complete atrioventricular block without hydrops.
• Comparison with a control group of 110 fetuses.

Main Results:

• Significantly lower ejection fraction observed in fetuses with hydrops and structural heart disease, and in those with structural heart disease alone, compared to controls.
• Normalized systolic flow velocity in the descending aorta in the hydrops with structural heart disease group, despite lower gestational age.
• Evidence of cardiac compensation in fetuses with complete atrioventricular block, indicated by higher flow velocity and contractility.

Conclusions:

• Fetal cardiac dysfunction is evident in conditions associated with hydrops fetalis and structural heart disease, primarily indicated by reduced ejection fraction.
• Fetuses can exhibit compensatory mechanisms, such as increased contractility and flow velocity, in response to cardiac challenges like complete atrioventricular block.
• Further research into fetal cardiac mechanics is warranted for improved diagnosis and management of these complex conditions.