Objective: To determine whether diltiazem therapy decreases proteinuria during pregnancy in women with chronic renal disease, resulting in decreased risk of pre-eclampsia, preterm delivery and intrauterine fetal growth restriction.
Methods: We undertook retrospective data collection by chart review of pregnant women with chronic renal disease. Women treated with and without diltiazem were compared by independent t test analysis.
Results: Seven women were eligible for inclusion in the study. Individual patient trends revealed decreased or attenuated increase in proteinuria across gestation with diltiazem therapy. Mean arterial pressure was also decreased in the therapy group compared to increased pressure in the third trimester in the group with no therapy. The incidence of fetal growth restriction and need for labor induction were lower in the diltiazem-treated group.
Conclusions: Diltiazem, a non-dihydropyridine calcium channel antagonist, decreases proteinuria and preserves renal structure and function and should be considered an alternative to angiotensin converting enzyme inhibitors in pregnancy in women with chronic renal disease.