Cardiovascular haemodynamics in pre-eclampsia using brain naturetic peptide and tissue Doppler studies

Area of Science:

• Cardiology
• Obstetrics
• Maternal-Fetal Medicine

Background:

• Preeclampsia (PE) poses significant risks to maternal and fetal well-being.
• Early detection of hemodynamic alterations in PE is crucial for timely intervention.
• Brain natriuretic peptide (BNP) and tissue Doppler echocardiography (TDI) are potential biomarkers for cardiovascular changes.

Purpose of the Study:

• To investigate early hemodynamic changes in preeclampsia using BNP and TDI.
• To correlate these echocardiographic and biochemical markers with obstetric outcomes.

Main Methods:

• A cohort of 115 primigravidae (52 with PE, 63 normotensive) in their third trimester were studied.
• Transthoracic echocardiography (TTE), tissue Doppler imaging (TDI), umbilical artery Doppler, and BNP levels were assessed.
• Measurements were taken during pregnancy and the puerperium, with patients matched for age.

Main Results:

• Antepartum and labor BNP levels were significantly higher in the PE group (p < 0.0001 and p < 0.01, respectively).
• Elevated Tissue Doppler Em/Ea ratios (p < 0.05) indicated diastolic dysfunction in PE patients.
• The PE group exhibited higher umbilical artery resistance (p < 0.001), increased Cesarean section rates (p < 0.001), and lower birth weights (p < 0.0001).

Conclusions:

• Preeclampsia is associated with elevated BNP levels and impaired left ventricular diastolic function, detectable by TDI.
• These hemodynamic changes normalize postpartum, as evidenced by returning BNP levels.
• The identified cardiovascular changes in PE correlate with adverse obstetric outcomes, including higher rates of Cesarean delivery and reduced fetal growth.