patho Q wave only
old MI
new MI: patho Q, ST elevated, T wave inverted
Absent P wave
atrial fib seen in hyperthyroidism
ST depressed
angina pectoris
ST elevated only
PEricarditis
tall tented T wave
vs.
U waves
tall tented: hyperkalemia
U wave: hypokalemia
1st cardiac enzyme to appear
troponin