Left ventricular geometry in pregnancy-induced hypertension

Area of Science:

• Cardiology
• Obstetrics
• Hypertensive Disorders

Background:

• Transient hypertension during pregnancy, specifically pregnancy-induced hypertension (PIH), is a common condition with unclear effects on cardiac geometry.
• Understanding these changes is crucial for maternal and fetal health management.

Purpose of the Study:

• To assess cardiac geometric changes in women with PIH compared to normal pregnant women (NPW).
• To identify specific patterns of cardiac geometry alteration in PIH.

Main Methods:

• A comparative study involving 55 women with PIH and 57 NPW, aged 28.5 +/- 7.5 and 30.7 +/- 7.5 years, respectively.
• Two-dimensionally guided M-mode echocardiography was used postpartum to calculate left ventricular mass index (LVMI) and relative wall thickness (RWT).
• Cardiac geometry patterns (normal geometry, concentric hypertrophy, eccentric hypertrophy, concentric remodeling) were classified based on LVMI and RWT measurements.

Main Results:

• Women with PIH exhibited significantly higher LVMI (106 +/- 29.4 g/m2 vs. 90.6 +/- 19.8 g/m2) and RWT (0.41 +/- 0.07 vs. 0.38 +/- 0.05) compared to NPW (P < .05).
• Using mean +/- 1 SD of NPW as normality limit, 53% of PIH patients had abnormal cardiac geometry, with eccentric hypertrophy (25.5%) and concentric remodeling (20%) being most frequent.
• Even with a stricter limit (mean +/- 2 SD), abnormal geometry was observed in 16% of PIH patients.

Conclusions:

• Pregnancy-induced hypertension is associated with increased left ventricular mass index and relative wall thickness.
• The most common abnormal cardiac geometry patterns observed in women with PIH are eccentric hypertrophy and concentric remodeling.
• These findings highlight the impact of PIH on cardiac structure and the need for monitoring.