Do maneuvers to decrease preload unmask characteristic respiratory variation in Doppler mitral E velocity in patients with suspected constrictive pericarditis?
Preload reduction maneuvers are recommended to unmask characteristic Doppler echocardiographic features of constrictive pericarditis when initial findings are equivocal.
When the respiratory variation in Doppler mitral E velocity is blunted or absent during the evaluation of suspected constrictive pericarditis, repeat Doppler recording of mitral flow velocities after maneuvers to decrease preload is recommended to unmask the characteristic respiratory variation in mitral E velocity.
Oh et al. (Tue,) studied this question.
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