Electrocardiography During the Third Trimester of Pregnancy: Description of its Characteristics

espanolObjetivo: Analizar las caracteristicas electrocardiograficas en embarazadas sin patologia cardiovascular. Material y metodos: Estudio de corte transversal, descriptivo, multicentrico. Se incluyeron pacientes sin patologia cardiovascular que cursaban el tercer trimestre de embarazo y que concurrieron a una evaluacion cardiologica preparto entre abril y julio de 2020; todas ellas firmaron el consentimiento correspondiente. Resultados: Se analizaron 80 trazados. La frecuencia cardiaca media fue 82 lpm (RIC: 70-93 lpm). La mediana del eje QRS fue 54° (RIC: 39°-71°). Se observaron ondas q e infradesnivel del segmento ST en cara inferior y de V4 a V6. La mediana del QTc fue 422 mseg (RIC: 404 mseg-445 mseg). La mediana del tiempo del pico de la onda T a su fin fue 86 mseg (RIC: 74-95 mseg). Conclusion: Las alteraciones mas frecuentes ocurrieron en DIII, DII, aVf y de V4 a V6. Las ondas q y el infraST fueron los cambios principales. Fueron infrecuentes las desviaciones del eje, la taquicardia sinusal o el QTc prolongado. EnglishObjective: The aim of this study was to analyze the electrocardiographic characteristics in pregnant women without cardiovasculardisease.Methods: This was a descriptive, cross-sectional, multicenter study, including patients without cardiovascular disease in their thirdtrimester of pregnancy, who underwent cardiac evaluation before delivery between April and July 2020. All patients signed the correspondinginformed 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° (IQR39°-71°). Q waves and ST-segment depression were observed in the inferior wall and from V4 to V6. Median QTc was 422 msec (IQR404-445 msec) and median time from T-peak to T-end was 86 msec (IQR 74-95 msec).Conclusion: The most common changes occurred in leads III and II, aVF and from V4 to V6. Main changes included Q waves andST-segment depression. Axis deviations, sinus tachycardia or prolonged QTc were rare