- | Page
UTA 5315 ADVANCED
PATHOPHYSIOLOGY SUMM ER
TEST 3 QUESTIONS AND ANSWERS
RATED A+
Question : Mitral Valve Stenosis
CORRECT ANSWER : - Characterized by
NARROWING of mitral valve
Normal is 4-6 cm -Narrowed is less than 2.5 cm
Caused by RHEUMATIC FEVER -More common in WOMEN -Oxygenated blood comes back into heart into the left atrium and down through the mitral valve to the left ventricle
Complex: Stenosis leads to volume/pressure in left
atrium, which results in atrial hypertrophy/dilation, which
- | Page
increases pressure/volume in the pulmonary circulation & causes PULMONARY EDEMA
Simplified: Skinny mitral valve doesn't let blood pass
through easily, so blood backs up into the left atrium and causes it to swell, then backs up into the lung and causes resp. symptoms
-S/sx: dyspnea, hemoptysis, a-fib, dysphagia, pulmonary
hypertension
Question : Mitral Valve Regurgitation
CORRECT ANSWER : -Characterized by
INCOMPLETE CLOSURE of mitral valve -Caused by MITRAL VALVE PROLAPSE (flaps don't close together properly, leaving valve ajar); more common in WOMEN; STICKING CHEST PAIN -Blood in left ventricle backs up to left ventricle during systole (mitral valve should be closed during systole/contraction of heart)
- | Page
-Leads to atrial dilation/hypertrophy, increased pulmonary vascular pressure/volume, PULMONARY EDEMA
-S/sx: Dyspnea, rales, pansystolic murmur, S3 & S4 heart
sounds
Question : Aortic Valve Stenosis
CORRECT ANSWER : -Most common valvular disease
-Most common causes are aortic valve CALCIFICATION (stiffening) in people over 60; congenital aortic valve stenosis in people less than 30 -Normal valve 3 cm; symptoms seen when valve less than
- cm; severe when valve is less than 0.5 cm
-Narrowed valve prevents outflow from left ventricle to aorta. This backs up blood to the left atrium and ultimately floods the lung causing PULMONARY EDEMA
S/Sx: Pulmonary hypertension/edema, poor outflow of
aorta to body (aorta sends out oxygenated blood to body), causing fainting or chest pain
- | Page
Simplified: Aorta is stiff and can't send out oxygenated
blood properly to the body, depriving tissues of oxygen.Blood gets backed up into lungs, causing pulmonary edema.
Question : Aortic Valve Regurgitation
CORRECT ANSWER : -Valve is TOO WIDE or TOO
NARROW, blood doesn't pass through effectively, causing back flow of blood into the left ventricle
-Marked by EARLY DIASTOLIC MURMUR (on systole, heart contracts and pushes blood up the aorta, but on diastole, heart relaxes and ineffective aortic valve is not able to hold blood up in aorta, so blood falls and makes a swish sound, which is the murmur) -Most commonly caused by AORTIC ROOT DILATION(starting point of aorta is too wide)
-Other causes: infective endocarditis, rheumatic fever,
aortitis from syphilis, coarctation (congenital narrowing of aorta), aortic dissection (tear), ankylosing spondylitis (inflammatory arthritis)