Antenatal echo- and electrocardiographic diagnosis of supraventricular and ventricular premature beats: a case of an ostium secundum atrial septal defect

Abstract

SummaryIn a fetus with an ostium atrial septal defect, supraventricular and ventricular premature beats were diagnosed antenatally, using simultaneous fetal M-mode echocardiography and electrocardiography. The shape of the QRS complex from the supraventricular premature beat was similar to that of the sinus complex. In case of the ventricular premature beat, a wide bizarre QRS complex was evident. This approach facilitates the antenatal diagnosis of fetal arrhythmia in utero.