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Echocardiographic Assessment of Cardiac Anatomy and Function in Adult Rats
Published on: December 13, 2019
Left ventricular diastolic function during normal pregnancy: assessment by spectral tissue Doppler imaging
1Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong. angelwyfok@yahoo.com
Summary
Tissue Doppler imaging (TDI) effectively assesses maternal diastolic function during pregnancy. This echocardiographic technique reveals significant changes in myocardial relaxation velocity throughout gestation, aiding in monitoring cardiac health.
Area of Science:
- Cardiology
- Obstetrics
- Echocardiography
Background:
- Diastolic function assessment in pregnancy is challenging due to changing loading conditions.
- Tissue Doppler imaging (TDI) offers a preload-independent method for evaluating cardiac function.
Purpose of the Study:
- To evaluate maternal diastolic function using TDI throughout pregnancy.
- To assess the utility of TDI in monitoring cardiac changes during gestation.
Main Methods:
- Prospective observational study of 35 healthy pregnant women.
- Performed M-mode, transmitral inflow, and TDI studies across trimesters and postpartum.
- Analyzed changes in E wave, A wave, Em wave, Am wave, and derived ratios.
Main Results:
- E/A ratio progressively decreased as pregnancy advanced.
- Peak myocardial velocities during early diastole (Em) decreased significantly in the third trimester/postpartum.
- Em/Am and E/Em ratios decreased significantly throughout pregnancy.
Conclusions:
- TDI effectively demonstrates changes in myocardial relaxation velocity during pregnancy.
- TDI is a valuable non-invasive tool for monitoring maternal cardiac function in high-risk pregnancies.
- Early detection of cardiac issues allows for timely interventions.
