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)"
