ECG EXAM NYU QUESTIONS WITH
COMPLETE SOLUTIONS.
, sympathetic autonomic innervation of the heart - ANSWERreleases epi, increases hr,
CO and BP, Increased firing of the SA node
Automaticity electrical heart cells - ANSWERCells ability to spontaneously generate
impulses
p wave - ANSWERatrial depolarization
QRS complex - ANSWERventricular depolarization
pr interval - ANSWERtime from sa node to av node
t wave - ANSWERventricular repolarization
sa node impulse rate - ANSWER60-100 bpm
av node impulse rate - ANSWER40-60 bpm
ventricular impulse rate - ANSWER20-40 bpm
small box ecg - ANSWER0.04 seconds
big box ecg - ANSWER0.20 second
6 second strip method - ANSWERCount QRS complexes on a 6-second strip and
multiply by 10.
BETWEEN THE 3 TICKS !!
PR interval - ANSWER0.12-0.20. ( 3-5 boxes)
qrs complex - ANSWER<0.12 ( 3 boxes )
p wave regularity - ANSWERof all p waves are in the same direction, depolarizations is
coming from the same foci
sinus block - ANSWERslight pause , skipped beat, resumes normally , on time after
pause
sinus arrest - ANSWERskipped beat, doesn't resume normally, 2 missed bests, does
not resume on time
premature atrial contractions - ANSWERrhythm: regular except pac
rate : underlying rhythm
COMPLETE SOLUTIONS.
, sympathetic autonomic innervation of the heart - ANSWERreleases epi, increases hr,
CO and BP, Increased firing of the SA node
Automaticity electrical heart cells - ANSWERCells ability to spontaneously generate
impulses
p wave - ANSWERatrial depolarization
QRS complex - ANSWERventricular depolarization
pr interval - ANSWERtime from sa node to av node
t wave - ANSWERventricular repolarization
sa node impulse rate - ANSWER60-100 bpm
av node impulse rate - ANSWER40-60 bpm
ventricular impulse rate - ANSWER20-40 bpm
small box ecg - ANSWER0.04 seconds
big box ecg - ANSWER0.20 second
6 second strip method - ANSWERCount QRS complexes on a 6-second strip and
multiply by 10.
BETWEEN THE 3 TICKS !!
PR interval - ANSWER0.12-0.20. ( 3-5 boxes)
qrs complex - ANSWER<0.12 ( 3 boxes )
p wave regularity - ANSWERof all p waves are in the same direction, depolarizations is
coming from the same foci
sinus block - ANSWERslight pause , skipped beat, resumes normally , on time after
pause
sinus arrest - ANSWERskipped beat, doesn't resume normally, 2 missed bests, does
not resume on time
premature atrial contractions - ANSWERrhythm: regular except pac
rate : underlying rhythm
