Cardio| Diastolic Heart Murmurs

1.07 Diastolic Heart Murmurs Cardiovacular system reveiw for the USMLE Step 1 exam. Diastolic heart murmurs occur when blood flow is turbulent during the diastolic phase of the heart Two diastolic murmurs discussed: aortic regurgitation and mitral stenosis Aortic regurgitation is caused by blood leaking backwards from the aorta into the left ventricle, resulting in a high pitched decrescendo murmur heard during diastole Aortic regurgitation is associated with conditions such as aortic root dilation, bacterial endocarditis, rheumatic fever, and bicuspid valve "A vacuum adds suction. Aortic regurgitation diastolic decrescendo" Mitral stenosis involves narrowing of the mitral valve, causing an opening snap followed by a rumbling sound during diastole The main cause of mitral stenosis is rheumatic fever "Ms snapped because her husband got strep throat from his lover. MS (mitral stenosis), snap’d (snap diastolic), strep throat (rheumatic fever)"