Sketchy Path: Mitral Valve Regurgitation and Mitral Valve Prolapse Flashcards
_____________ is the number one cause of mitral regurgitation.
Mitral valve prolapse (like the jester riding the parasail that is bulging upward)
The most common cause of mitral valve prolapse is ______________.
myxomatous degeneration of the connective tissue in the mitral valve (like the MiXer that is propelling the parasailing jester)
In addition to stretching valve leaflets, myxomatous degeneration can also cause ______________.
stretching and rupture of the chordae tendonae (like the other parasailing jester with the mixer who has broken parachute cords)
Infective endocarditis can cause what mitral valve pathology?
Ruptured chordae tendonae (like the jester stuck in the tree with the broken cords who is lighting the lantern that represents endocarditis)
How does acute mitral regurgitation affect cardiac output?
It acutely decreases CO (like the jester who can’t get his heart flashlight working).
Mitral regurgitation causes increased ______-load for the LV.
pre (like the jester pulling his friend out of the water)
Mitral regurgitation can result in what lung pathology?
Pulmonary venous congestion (like the unconscious jester’s wet life preserver)
What happens to afterload in acute mitral regurgitation?
It decreases due to decreased CO (like the jester pushing the rock off the cliff –his afterload is falling).
True or false: acute mitral regurgitation causes decreased ejection fraction.
False. Because of the increased preload, the LV actually expels more of its EDV. The difference is that some of the blood gets pumped back into the LA.
(Think of the jester flying the fraction-evoking glider.)
List some of the other causes of primary mitral regurgitation.
- Chronic rheumatic heart disease (jester eating pie)
- Infective endocarditis (jester with heart lantern who has vegetations growing on his clothes from being lost in the woods)
List some of the other causes of secondary mitral regurgitation.
• DCM (like the dilated hot air balloon with the rim of the basket being pulled open by the jester)
Why doesn’t chronic mitral regurgitation cause pulmonary symptoms?
With a gradual progression, the left atrium has time to adapt and can accommodate the extra preload.
(Think of the hot air balloon with the grandfather clock in it –for chronicity –with the hypertrophied left portion.)
What happens to cardiac output during chronic mitral regurgitation?
It is preserved by increased EF (like the pie fraction being elevated in the air).
If mitral regurgitation persists for too long, the LV can undergo ________________.
eccentric hypertrophy (like the dilated ribbons around the hot air balloons)
What murmur is common in mitral regurgitation?
Holosystolic murmur that radiates to the axilla (like the jester with the systolic spray with the other jester under his armpit)