Commentary: Is length (of the anterior mitral leaflet) important?

[摘要] Our understanding of left ventricular outflow tract obstruction (LVOTO) has evolved significantly over the past 25 years. It was long thought that hypertrophy was absolutely necessary to generate obstruction and that obstruction was uncommon. These myths have been dispelled. Although only 25% of patients have resting gradients, more than 70% of patients will develop obstruction with exercise.1 We found, using detailed magnetic resonance imaging analysis of left ventricle and outflow tract angles, septal thickness, and mitral valve abnormalities, that the greater the acuteness of the angle between the aorta and the apex, the greater the gradient independent of basal septal thickness.

[学科分类] 心脏病和心血管学