anatomy anterior interventricular sulcus aorta aortic insufficiency aortic sinus aortic valve aortic valve repair aortic valve replacement aortic valvuloplasty apex of the heart artificial heart valve base of the heart bicuspid aortic valve bishop bjork-shiley valve bundle of his cardiac fibrosis cardiac pacemaker cardiac skeleton chordae tendineae circulatory system conus arteriosus crista terminalis cusps of heart valves diaphragmatic surface of heart endocarditis endocardium fibrous pericardium fibrous rings of heart fibrous trigone heart heart sounds human anatomy interatrial groove left atrial appendage left atrium left heart left margin of heart left ventricle limbus of fossa ovalis mitral stenosis mitral valve mitral valve prolapse mitral valve repair mitral valve replacement mitral valvuloplasty mitre musculi pectinati papillary muscle pericardial cavity pericardial sinus pericardium posterior interventricular sulcus pulmonary artery pulmonary circulation purkinje fibers reed valve rheumatic fever right atrial appendage right atrium right border of heart right heart right ventricle serous pericardium stenosis sternocostal surface systemic circulation systole torso trabeculae carneae tricuspid valve valve of the coronary sinus valve of the inferior vena cava valvular heart disease