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Published on: March 4, 2022
[Renal and uterine hemodynamics in pregnancy with chronic glomerulonephritis of the hypertonic type]
Insights
Pregnancy does not alter renal artery resistance in women with chronic glomerulonephritis (CGN) and hypertension. Renal circulation in these patients responds to systemic hemodynamic changes, unlike in essential hypertension.
Area of Science:
- Obstetrics and Gynecology
- Nephrology
- Cardiovascular Physiology
Context:
- Hypertension in pregnancy, particularly with chronic glomerulonephritis (CGN), presents complex hemodynamic challenges.
- Understanding gestational hemodynamic adaptations is crucial for managing these high-risk pregnancies.
Purpose:
- To investigate gestational changes in renal and uterine hemodynamics.
- To examine the relationship between these changes and systemic/intracardiac hemodynamics in pregnant women with CGN and hypertensive disorders.
- To establish baseline hemodynamic parameters postpartum.
Summary:
- Renal artery resistance remained stable during pregnancy and postpartum in women with CGN and hypertensive disorders.
- Uterine artery resistance decreased as pregnancy progressed.
- Renal artery resistance correlated with cardiac output and heart rate, but uterine artery hemodynamics showed limited correlation with systemic or cardiac measures.
Impact:
- Findings suggest potential disturbances in renal autoregulation in CGN patients with hypertensive disorders.
- These hemodynamic alterations may influence pregnancy outcomes in this population.
- Highlights the distinct renal hemodynamic response in CGN compared to essential hypertension during pregnancy.
Aim:
To study gestational changes in renal and uterine hemodynamics and their relation to systemic and intracardiac hemodynamics in pregnant hypertensive women with chronic glomerulonephritis (CGN).
Material And Methods:
Echocardiography, ultrasonic dopplerography of renal and uterine arteries were made in 16 pregnant women with CGN and AH syndrome in trimester II-III and 1-3 months after the delivery. Hemodynamic indices in pregnancy were compared to those after the delivery which were considered baseline.
Results:
In CGN pregnant women with AH syndrome resistance of renal arteries did not change in pregnancy and were similar postpartum. With advancing pregnancy, the resistance of the uterine arteries diminished. The indices of the resistance in the main trunk of the renal artery correlated with volumetric cardiohemodynamic indices, heart rate and total peripheral resistance in segmental interlobular arteries. No significant correlation were found between uterine, systemic and cardiac hemodynamics though it existed between renal and uterine blood flow.
Conclusion:
Pregnancy does not affect vascular resistance of renal arteries in CGN pregnant women with AH syndrome, but contrary to pregnancy with essential hypertension in that with CGN and AH syndrome renal circulation responds to changes in systemic hemodynamics and volumetric indices of cardiohemodynamics. These findigns may reflect disturbances in autoregulation of renal circulation and additional effects on pregnancy outcome in women with CGN and AH syndrome.
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