heart valve anatomy. cross section of human heart

heart valve anatomy surgery pulmonary tricuspid aortic mitral biological mechanical human anatomy diagram valves medical cross organ biology cardiac ventricle atrium close-up cut tissue aorta congenital disease defect structure healthy cardiovascular health attack care cardiology medicine healthcare problem blood diagnosis heartbeat stenosis prolapse bicuspid aortic endocarditis replacement implantation annulus leaflets disease defects rheumatic echocardiography valvuloplasty repair circulation diastolic coronary failure systolic cardiomyopathy arrhythmia surgeon physiology system implantation