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> The mitral valve peak E wave shows a marked variation – apparently during respiration (Figures 12-13). However, the presence of irregular atrial fibrillation is a confounder and makes this pericardial constriction sign potentially unrealiable.

> The pulsed tissue Doppler sampling of the mitral annulus (Figure 14-15) shows equivalent / slightly higher peak myocardial velocities on the medial/septal side (Figure 14), another sign consistent with pericardial constriction.

>二尖瓣E峰呈现显著变化—明显伴随呼吸变化（图12-13）。然而，不规则房颤的出现是一个干扰因子，使得此心包缩窄信号有潜在的不可靠性。 >脉冲组织多普勒二尖瓣瓣环取样（图14-15）显示中部/间隔一侧的心肌最大速度与侧壁相比，数值相等或稍高（图14），这是另一个符合心包缩窄的信号。