Diastolic murmur - mitral valve narrowing sound

Description

Low-frequency, diastolic buzzing is as audible as the bell portion of the stethoscope when placed in the pre-cardiac mitral region when the patient is in a left-leaning position.

Figure. Timing and shape of mitral stenosis.

Reason

Rheumatic heart disease - most common.

Congenital mitral stenosis - rare.

Mechanism

Blood flow through the narrow valve opening, damaged during diastole. The immune mechanism in post-rheumatic heart disease is thought to be due to a repetitive attack of subclinical low factors, the prolonged activity of low factors, or impaired hemodynamic damage. to progressive fibrosis, calcification and hardening of the valve apparatus cause the valve blades to not open effectively during diastolic and cause valve stenosis.

When the opening of the valve is narrowed, the amount of blood circulating it during diastole becomes disturbed and produces a characteristic mind-blowing.

Meaning

Very specific for mitral stenosis and requires further screening if you hear it.