Schulman P, Come P C, Isaacs R, Radvany P
Chest. 1981 Jul;80(1):110-3. doi: 10.1378/chest.80.1.110.
Echocardiographic abnormalities of valvular movement described in patients with pericardial effusions have included systolic anterior motion (SAM) of the mitral valve. Published illustrations have shown, however, "pseudo-SAM" rather than true SAM. We report a patient with asymmetric septal hypertrophy whose echocardiogram during tamponade showed true SAM, which was no longer apparent and could not be provoked following resolution of tamponade. Two prior cardiac catheterizations revealed no intraventricular pressure gradients in either normal or postextrasystolic beats. Tamponade was the only stimulus that provoked signs of obstruction in this patient with asymmetric septal hypertrophy.
心包积液患者中描述的瓣膜运动的超声心动图异常包括二尖瓣收缩期前向运动（SAM）。然而，已发表的插图显示的是“假性SAM”而非真正的SAM。我们报告了一名患有不对称性室间隔肥厚的患者，其在心脏压塞期间的超声心动图显示为真正的SAM，在心脏压塞解除后不再明显且无法诱发。之前的两次心导管检查显示，在正常或早搏后的搏动中均无室内压力梯度。心脏压塞是该例不对称性室间隔肥厚患者中引发梗阻征象的唯一刺激因素。
