Pulmonary valve insufficiency
Encyclopedia
Pulmonary valve insufficiency (or incompetence, or regurgitation) is a condition where the pulmonary valve
is not strong enough to prevent backflow into the right ventricle
. If it is secondary to pulmonary hypertension it is referred to as a "Graham Steell" murmur.The three primary pathological mechanisms causing Pulmonary Valve insufficiency are dilatation of the pulmonic valve ring, acquired alteration of pulmonic valve leaflet morphology, or congenital absence or malformation of the valve
Pulmonary valve
The pulmonary valve is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps. Similar to the aortic valve, the pulmonary valve opens in ventricular systole, when the pressure in the right ventricle rises above the pressure in the...
is not strong enough to prevent backflow into the right ventricle
Right ventricle
The right ventricle is one of four chambers in the human heart. It receives deoxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the pulmonary valve and pulmonary trunk....
. If it is secondary to pulmonary hypertension it is referred to as a "Graham Steell" murmur.The three primary pathological mechanisms causing Pulmonary Valve insufficiency are dilatation of the pulmonic valve ring, acquired alteration of pulmonic valve leaflet morphology, or congenital absence or malformation of the valve
External links
- http://www.uwhealth.org/page.asp?contentid=11094
- http://www.cvphysiology.com/Heart%20Disease/HD005.htm
- Congenital Heart Surgery
- The Congenital Heart Surgery Video Project
- Adult Congenital Surgery: Pulmonary Valve Replacement
- http://emedicine.medscape.com/article/157639-overview#a0104