aortic insufficiency- A pathological condition characterized by retrograde blood flow from the aorta into the cavity of the left ventricle through a defective aortic valve. Among those who died from various pathologies of the heart, aortic valve insufficiency was detected in 14% of cases, of which 3.7% were isolated, and 10.3% were combined with other defects.
- Dissecting aortic aneurysm
- Marfan syndrome (dilation of the aortic valve ring)
- Rheumatic valve disease (fibrosis and shortening of the valves)
Hemodynamic disturbances are due to regurgitation of blood from the aorta to the left ventricle during diastole. In some cases, regurgitation reaches 60-75% of the shock volume. The increase in blood flow causes the expansion of the cavity of the left ventricle (tonogenic dilatation). Due to the strengthening of heart contractions, the left ventricle throws into the aorta a 2-3-fold increase in blood volume.As the defect develops, myogenic dilatation begins, and the strength of muscle contraction weakens. In the cavity of the left ventricle appears and increases the residual volume of blood. All this causes stagnation in the small circle and the left atrium. Suffering from coronary blood flow that does not meet the needs of hypertrophied myocardium.