2024 UPDATE MOST TESTED QUESTIONS
WITH ANSWER [VERIFIED MARKING SCHEME]
GET IT RIGHT
3 things that change automaticity of automatic cells - (correct answer)
1. slope of phase 4
2. Change of threshold potential
3. Change of resting membrane potential
Ohm's law equation - (correct answer) V=IR
EKG monitored patient should be __________, monitor chassis should
be ___________ (nonconductive). Why - (correct answer)
ungrounded, grounded. Grounded patient would be able to conduct
leakage currents. we dont want this
lb to kg - (correct answer) 2.2 lb = 1 kg
F to C - (correct answer) C=5/9(F-32)
C to F - (correct answer) F=9/5C+32
,a systole is represented by what portion of the ECG - (correct answer)
QT interval
What is main ion transfer during systole - (correct answer) K+ seeps
out, Ca2+ enters
At rest, what is intracellular/extracellular environment - (correct
answer) inside negative, outside positive
What phase of AP is resting membrane potential - (correct answer)
phase 4
Nodal depolarization occurs via what channel - (correct answer)
Ca2+ slow channel
Cardiac muscle cell depol occurs via what channel - (correct answer)
Na+ fast channel
During which phases is cell refractory - (correct answer) 1,2,3
TDP caused by what mechanism usually - (correct answer) EAD's
(triggered activity)
, Variance - (correct answer) Take each number in sample, subtract
each number from mean, square each difference, add all, divide sum by
number in sample -1
Standard deviation - (correct answer) square root of variance
P value - (correct answer) Probability of certainty / smaller p value
means the more likely the result could not occur by chance
survival curve showing % of patients surviving treatment over time -
(correct answer) Kaplan - Meier curves
when measuring EGM's, earliest atrial activation usually from _____
and earliest ventricular usually from ______ - (correct answer) P
wave / QRS
Morady maneuver is used to differentiate - (correct answer)
differentiate AT from AVNRT/AVRT
Most common arrhythmia - (correct answer) AF
Most common SVT - (correct answer) AVNRT