Heart rate variability in pregnant women with arterial hypertension

Abstract

Objective. To study heart rhythm variability (HRV) in ethnic groups of pregnant women with and without arterial hypertension during all gestation period. Design and methods. 100 pregnant Russian and Buryat women with arterial hypertension formed the main group. The control group included 100 healthy pregnant women with a normal current of pregnancy, without arterial hypertensions. All subjects underwent Holter ECG monitoring («Incart», «Kardiotechnika-04-BP-3», Russia). Results. There is a significant decrease in time parameters of rhythm variability n pregnant Buryat women with arterial hypertension in the second trimester. In the third trimester of pregnancy heart rhythm variability is higher in hypertensive women compared to those without hypertension. In Russian population indicators of heart rate variability do not vary during the day. In an ethnic group of women with arterial hypertension an increase of indicators of low and high frequencies due to the prevalence of vascular sympathetic regulation is observed in the first trimester of pregnancy. Conclusions. Pregnant women of the Buryat population with arterial hypertension have lower heart rhythm variability in the first and second trimesters of pregnancy. In Russian population the variability parameters do not change.