The U wave and papillary muscle variants: revisiting an old association.
One of the earliest hypotheses on the origin of the U wave was that these waves represent repolarisation of the papillary muscles and their neighboring structures. Various U-wave and TU-segment abnormalities have been described and ascribed to certain cardiac pathological conditions. In this case report it is hypothesised that prominent U waves in the inferior leads are caused by an accessory papillary muscle. Any possible long-term consequences are not known.
Ker
James
J
Department of Physiology, University of Pretoria, South Africa. jker@wol.co.za
D000293:Adolescent; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000033:anatomy & histology*; D006801:Humans; D010210:Papillary Muscles / Q000033:anatomy & histology*