myocardial infarction

Question 1

myocardial ischemia with injury/necrosis

Answer 1

myocardial infarction

Question 2

chest pain RADIATES to neck or left arm
diaphoresis
tachycardia
dyspnea
nausea
EKG changes
↑ cardiac enzymes (vs angina)

Answer 2

myocardial infarction (signs of damage to myocardial tissue)

Question 3

most commonly occluded vessel in MI

Answer 3

left anterior descending artery: supplies anterior wall

Question 4

most common types of MI

Answer 4

1) LAD: anterior wall MI
2) RCA
3) circumflex

Question 5

types of acute coronary syndrome (patient experiencing ischemia)

Answer 5

unstable angina: chest pain at rest
if ↑ cardiac enzymes = MI:
STEMI: ST elevation or chest pain and a new LBBB
NSTEMI: ST depression or T wave inversion

Question 6

ischemic necrosis of

Answer 6

subendocardial infarction

Question 7

ST segment depression

Answer 7

subendocardial infarct

Question 8

ST segment elevation (STEMI) → progresses to Q wave

Answer 8

transmural infarct

Question 9

ischemic necrosis of entire wall

Answer 9

transmural infarct

Question 10

post-MI complications

Answer 10

cardiac arrhythmia
LV failure (can cause S4 heart sound) and pulmonary edema
cardiogenic shock (not pumping → no perfusion)
ventricular free wall rupture (macrophages remodel → weakened wall → bleed into pericardium → cardiac tamponade)
papillary muscle rupture: MITRAL REGURGITATION
IV septal rupture: VSD
aneurysm of ventricle: scar tissue bulges with contractions → embolus from mural thrombus (blood pooling in ventricle) → stroke (most often)
fibrinous pericarditis: friction rub 3-5 days post MI, painful relieved by leaning forward
dressler syndrome: pericarditis >2 weeks: fever, chest pain