The role of impedance cardiography in the evaluation of the hemodynamic profile in the first trimester of pregnancy

R.M. Sima, I.A. Bădărău, C. Ciornei, R. Papacocea, I. Iurieț, A.D. Stănescu, L. Pleș

Rezumat: Introduction. Pregnancy is characterized by specific cardiovascular changes which begin in the early weeks of gestation. There are multiple means of monitoring hemodynamics, and cardiac impedance proved its applicability in obstetrics in recent years. Material and methods. We performed a prospective study in ”Bucur” Maternity, which involved assessing the hemodynamic profile of pregnant women with single fetus in the first trimester of pregnancy compared to a control group of non-pregnant women. We used the technique of impedance cardiography. Results. This study involved 86 pregnant women in the first trimester compared to 20 non-pregnant women. Using the impedance cardiography technique we found that base impedance in women with single fetus (56.47 Ohm) is increased compared with non-pregnant women (26.14 Ohm), U=51,000, Z=-6.535, p<0.0001. Pregnancy influences heart rates values, which has higher values (85.6 b/min) compared with non-pregnant women (74.3 b/min). Electromechanical systole in the first trimester of pregnancy in women with single fetus (399.73 ms) registered increased values than the control group (393.36 ms), p=0.030. The duration of ventricular is significantly increased in pregnant women (281.7 ms) compared to non-pregnant women (277.39 ms). Conclusions. Impedance cardiography provides the hemodynamic profile of pregnant women and the variation of cardiovascular parameter is detected from the first trimester of pregnancy.
Cuvinte cheie: base impedance, cardiac output,hemodynamics, cardiovascular.