Valvular disease Flashcards Preview

Bio 252- atherosclerosis > Valvular disease > Flashcards

Flashcards in Valvular disease Deck (11):
1

4 valves where are they?

-Aortic valve (left ventricle to aorta)
-pulmonary valve (right ventricle to pulmonary artery)
-right atrioventricular valve (between right atrium & ventricle)
-left atrioventricular valve (MITRAL VALVE) (between left atrium and ventricle)

2

what is the purpose of heart valves?

they provide unidirectional flow

3

Problems with valves

-valves stiff, wont open -- impedes blood flow
-valves lax, don't close adequately --- blood regurgitates

4

if valves are damaged

regurgitation or impeded blood flow

5

which valves are more susceptible?

-mitral & aortic
-because on L side of heart, both valves persistently exposed to high pressure because left side of heart pumps to whole systemic circulation

6

Etiology of valvular disease

-Congenital defects (introduction of a teratogen)
-Degenerative changes (aging)
-Ischemic damage (ex. MI near AV valve)

7

Stenosis =

narrowing of valve orifice & failure of valve leaflets to open normally

8

Stenoic valve

-stiff valves
-poor opening
-impeded blood flow

9

Regurgitant Valve

-Distorted leaflets
-Improper closure (do not close when meant to)
-regurgitation

10

Both stenoic valve & regurgitant valve

alter cardiac blood flow and increase workload

11

Treatment for valvular disease

-drugs to maintain function & prevent failure (ensure heart doesn't fail)
-Sx, if indicated after drugs surgery next option
(synthetic valves, Pig valves)