But it is very difficult to observe the bloodflow in the subendocardial. Fortunately the high speed CCD microscope provides a powerful tool.
但是，观测心内膜血流是十分困难的，而高速CCD显微镜为观测提供了有力的工具。
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Purpose: This study was designed to investigate the value of myocardial contrast echocardiography (MCE) for measuring the coronary bloodflow reserve and subendocardial perfusion.