Abstract
During the pregnancy there is a dynamic change in the structure and electric activity of the heart. The cardiac arrhythmias are seen commonly in later part of pregnancy. The arrhythmias seen in pregnancy are due to potential factors that include the direct cardiac electrophysiological effects of hormones, changes in autonomic tone, hemodynamic change, hypokalemia of pregnancy, and underlying heart disease. Estrogen has been shown to prolong QT interval and precipitate arrhythmias in pregnancy in animal studies.[8],[9] However, there is not much human studies regarding QTc in different trimester of pregnancy. A cross sectional study is done in 150 pregnant women in different trimester and 50 non pregnant women in department of OBG in KVG Medical College sullia. The ECG is recorded in all the pregnant & non pregnant women. There is significant decrease in PR interval when compared with 1st trimester, 2ndtrimester & non pregnant women. QTc interval increases in 3rd trimester when compared with 1st trimester, 2nd trimester and non pregnant women. Results also shows significant increase in heart rate in all three trimesters of pregnancy.
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