Ker James
Department of Physiology, University of Pretoria, Pretoria, South Africa.
Clin Med Insights Cardiol. 2010 Jul 20;4:49-51.
Left ventricular false tendons are thin, fibromuscular structures which traverse the left ventricular cavity. They are thought to be intracavitary radiations of the bundle of His. Usually these tendons span between the interventricular septum and the lateral wall or a papillary muscle. They have been known to be a source of innocent and musical murmurs.In this case report a peculiar left ventricular false tendon is shown-one extending between the two papillary muscles, giving the appearance of a musical note. During ventricular diastole the tendon is pulled taut between the two heads of the papillary muscles and during ventricular systole the tendon relaxes. The echocardiographic characteristics and possible long term implications are discussed.
左心室假腱索是横贯左心室腔的薄纤维肌性结构。它们被认为是希氏束的腔内分支。通常这些腱索在室间隔与侧壁或乳头肌之间延伸。它们一直被认为是无害的音乐样杂音的来源。在本病例报告中展示了一条特殊的左心室假腱索——一条在两个乳头肌之间延伸，呈现出音符外观的假腱索。在心室舒张期，腱索在乳头肌的两个头之间被拉紧，而在心室收缩期，腱索松弛。本文讨论了其超声心动图特征及可能的长期影响。
