左室容积 meaning in Chinese

bulk of left ventricle

Background ? in the present study , we sought to determine whether opening a persistently occluded infarct - related artery ( ira ) by percutaneous coronary interention ( pci ) in patients beyond the acute phase of myocardial infarction ( mi ) improes patency and indices of left entricular ( l ) size and function
背景：现在研究是为了决定是否采取经皮冠脉介入术开通心肌梗死急性期过后的病人的已经持久闭塞的梗死相关动脉，以期能改善血管开通和左室容积以及射血分数。