EKG monitored patient should be , monitor chassis should be
(nonconductive). Why - CORRECT - ungrounded, grounded.
Grounded patient would be able to conduct leakage currents. we dont want this
lb to kg - CORRECT - 2.2 lb = 1 kg
F to C - CORRECT - C=5/9(F-32)
C to F - CORRECT - F=9/5C+32
3 things that change automaticity of automatic cells - CORRECT - 1. slope of
phase 42. Change of threshold potential
3. Change of resting membrane potential
a systole is represented by what portion of the ECG - CORRECT - QT interval
What is main ion transfer during systole - CORRECT - K+ seeps out, Ca2+ enters
At rest, what is intracellular/extracellular environment - CORRECT - inside
negative,outside positive
What phase of AP is resting membrane potential - CORRECT - phase 4
Nodal depolarization occurs via what channel - CORRECT - Ca2+ slow channel
Cardiac muscle cell depol occurs via what channel - CORRECT - Na+ fast channel
During which phases is cell refractory - CORRECT - 1,2,3
TDP caused by what mechanism usually - CORRECT - EAD's (triggered activity)
, Variance - CORRECT - 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 - square root of variance
P value - CORRECT - 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 - Kaplan
-Meier curves
when measuring EGM's, earliest atrial activation usually from and earliest
ventricular usually from - CORRECT - P wave / QRS
Morady maneuver is used to differentiate - CORRECT - differentiate AT from
AVNRT/AVRT
Most common arrhythmia - CORRECT - AF
Most common SVT - CORRECT - AVNRT
What type of single use devices can be resterilized and why? - CORRECT - Diagnostic
EPelectrodes because lumen and technically not a catheter because no lumen
Fr to mm - CORRECT - 1 Fr = .33 mm
Tip inner diameter standard diagnostic cardiac catheters and why - CORRECT -
.038inch / because it is supposed to be used with .035-.038 inch guide wires
What is 2 rules for CMC's like spiral or lasso - CORRECT - 1. Only approved for use in
LAdue to chordae tendinea
2. Only rotate shaft clockwise
Stereotaxis catheters - CORRECT - Have magnets in tip for maneuverability in
responseto changes in magnetic field
What system remotely steers guided catheters - CORRECT - Hansen robotic system
ACT for using array - CORRECT - ACT 250-300
bipolar cardiac electrodes record local that occur during phase -
CORRECT - depolarizations / phase 0
surface EKG leads usually filtered at what - CORRECT - .1 - 100 Hz
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