title: The effect of pregnancy on the frontal plane QRS axis.
abstract: The electrical axis of the heart is an important parameter in electrocardiographic assessment. Slight degrees of left axis deviation have been attributed to a horizontal heart position resulting from the mechanical effects of abdominal distension, such as the physiological event of pregnancy. This study was undertaken to establish the validity of this concept.
mesh_terms: D000005:Abdomen / Q000502:physiology; D001696:Biomechanical Phenomena; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D007743:Labor, Obstetric; D011247:Pregnancy