SEARCH RESULTS FOR: Mitral-Regurgitation-Pathogenesis-and-clinical-findings

Mitralklappeninsuffizienz: Pathogenese und klinische Befunde

Mitralklappeninsuffizienz: Pathogenese und klinische Befunde

Mitral Regurgitation Pathogenesis and clinical findings

Mitral Regurgitation: Pathogenesis and clinical findings Coronary Artery Disease Authors: Juliette Hall, Victoria Nkunu Reviewers: Raafi Ali, Jack Fu, Usama Malik, Sina Marzoughi, Jason Waechter* * MD at time of publication (Ischemic Heart Disease & Myocardial Infarction) Myocarditis Left ventricular dilation displaces papillary muscles Dilation of the Tethering of mitral valve annulus chordae tendineae ↑ Volume and pressure in left atrium ↑ Volume pushed back into left ventricle Dilated left ventricle Apical impulse on palpation and auscultation ↓ Forward flow of blood out of heart Blood backs up into pulmonary circulation ↑ Intravascular hydrostatic pressure in pulmonary vessels Fluid extravasates out of vessels and into the lungs Papillary muscle rupture Mitral valve leaflets flail Mitral valve prolapse Structurally abnormal valve Connective tissue disorders Weak valve leaflets Rheumatic heart disease Dilatation of the mitral valve annulus, inflammation of leaflets Infective endocarditis Vegetations form on valve leaflets Mitral Regurgitation Blood consistently flows backward throughout systole Holosystolic murmur, radiates to axilla, ↑ with afterload (e.g. making a fist) Backflow of blood from left ventricle to left atrium due to impaired mitral valve closure S3 heart sound Myocardial remodeling ↓ Muscle efficiency ↓ Left ventricle systolic function ↓ O2 saturation, tachypnea, wheeze, ↑ work of breathing, crackles, frothy sputum (if severe) Congestive heart failure ↓ Stroke volume ejected into aorta ↓ Cardiac output ↓ Organ perfusion ↓ O2 to kidney Activation of renin-angiotensin- aldosterone system ↑ Reabsorption of water by kidneys ↑ Intravascular hydrostatic pressure systemically Peripheral edema Injury to kidney parenchyma ↓ ability for kidney to clear creatinine ↑ Serum creatinine Legend: Pathophysiology Mechanism Sign/Symptom/Lab Finding Complications Published Feb 3, 2018, updated Oct 15, 2023 on www.thecalgaryguide.com