Objective:

The aim of this study was to analyze the electrocardiographic characteristics in pregnant women without cardiovascular disease.

Methods:

This was a descriptive, cross-sectional, multicenter study, including patients without cardiovascular disease in their third trimester of pregnancy, who underwent cardiac evaluation before delivery between April and July 2020. All patients signed the corresponding informed consent.

Results:

A total of 80 tracings were analyzed. Median heart rate was 82 bpm (IQR 70-93 bpm) and median QRS axis was 54° (IQR 39°-71°). Q waves and ST segment depression were relatively frequent in inferior leads and from V4 to V6. Median QTc was 422 msec (IQR 404-445 msec) and median time from T wave peak to T wave end was 86 msec (IQR 74-95 msec).

Conclusion:

The most common changes occurred in T wave peak to T wave end and from V4 to V6. Main changes included q waves and ST-segment depression. Axis deviations, sinus tachycardia or prolonged QTc were rare.