冠脉供氧VS.需氧 C. Components of O2 Balance in Myocardium Sympathetic stimulation Coronary dilation (coronary reserve) Hypertension Aortic regurgitation etc. Wall tension K >1/Coronary resistance Prontxr Diastolic O2 supply O2 demand 2Xwall thickness perfusion pressure Heart rate Arterial O2 concentration Contractility↑ Coronary insufficiency 冠脉自我调节功能？ Second Clinical Medical College of Southern Medical UniversitySecond Clinical Medical College of Southern Medical University 冠脉供氧 VS. 需氧 冠脉自我调节功能？