Chronic rheumatic mitral regurgitation with normal atrial size and pulmonary artery pressure

摘要

Chronic rheumatic mitral regurgitation (MR) is identified by enlargement of left atrium (LA) size as a pathophysiologic response to volume overload and establishment of LA pressure hemostasis, and to maintain pulmonary artery pressure (PAP) within normal limits; but in our country, we have observed some cases with severe rheumatic MR with normal atrial size and normal PAP. Therefore, the LA size could not be performed using measurement of atrial size in this subgroup of rheumatic mitral diseases.