IBHRE CEPS FINAL EXAM WITH ALL QUESTIONS ANSWERED CORRECTLY RECENTLY UPDATED 2024

IBHRE CEPS FINAL EXAM WITH ALL QUESTIONS ANSWERED CORRECTLY RECENTLY UPDATED 2024 What is main ion transfer during systole - K+ seeps out, Ca2+ enters At rest, what is intracellular/extracellular environment - inside negative, outside positive What phase of AP is resting membrane potential - phase 4 Nodal depolarization occurs via what channel - Ca2+ slow channel Cardiac muscle cell depol occurs via what channel - Na+ fast channel During which phases is cell refractory - 1,2,3 TDP caused by what mechanism usually - EAD's (triggered activity) Ohm's law equation - V=IR EKG monitored patient should be __________, monitor chassis should be ___________ (nonconductive). Why - ungrounded, grounded. Grounded patient would be able to conduct leakage currents. we dont want this lb to kg - 2.2 lb = 1 kg F to C - C=5/9(F-32) C to F - F=9/5C+32 3 things that change automaticity of automatic cells - 1. slope of phase 4 2. Change of threshold potential 3. Change of resting membrane potential a systole is represented by what portion of the ECG - QT interval Variance - Take each number in sample, subtract each number from mean, square each difference, add all, divide sum by number in sample -1 Standard deviation - square root of variance P value - 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 - Kaplan - Meier curves when measuring EGM's, earliest atrial activation usually from _____ and earliest ventricular usually from ______ - P wave / QRS Morady maneuver is used to differentiate - differentiate AT from AVNRT/AVRT Most common arrhythmia - AF Most common SVT - AVNRT What type of single use devices can be resterilized and why? - Diagnostic EP electrodes because lumen and technically not a catheter because no lumen Fr to mm - 1 Fr = .33 mm