IBHRE CEPS Exam Questions and Answers guaranteed to pass..docx - Nursing Hero (2024)

IBHRE CEPS Exam Questions and Answers guaranteed to pass. Ohm's law equation - Answer - V=IR EKG monitored patient should be __________, monitor chassis should be ___________ (nonconductive). Why - Answer - ungrounded, grounded. Grounded patient would be able to conduct leakage currents. we dont want this lb to kg - Answer - 2.2 lb = 1 kg F to C - Answer - C=5/9(F-32) C to F - Answer - F=9/5C+32 3 things that change automaticity of automatic cells - Answer - 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 - Answer - QT interval What is main ion transfer during systole - Answer - K+ seeps out, Ca2+ enters At rest, what is intracellular/extracellular environment - Answer - inside negative, outside positive What phase of AP is resting membrane potential - Answer - phase 4 Nodal depolarization occurs via what channel - Answer - Ca2+ slow channel Cardiac muscle cell depol occurs via what channel - Answer - Na+ fast channel During which phases is cell refractory - Answer - 1,2,3 TDP caused by what mechanism usually - Answer - EAD's (triggered activity)

Variance - 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 - Answer - square root of variance P value - 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 - Answer - Kaplan - Meier curves when measuring EGM's, earliest atrial activation usually from _____ and earliest ventricular usually from ______ - Answer - P wave / QRS Morady maneuver is used to differentiate - Answer - differentiate AT from AVNRT/AVRT Most common arrhythmia - Answer - AF Most common SVT - Answer - AVNRT What type of single use devices can be resterilized and why? - Answer - Diagnostic EP electrodes because lumen and technically not a catheter because no lumen Fr to mm - Answer - 1 Fr = .33 mm Tip inner diameter standard diagnostic cardiac catheters and why - Answer - .038 inch / because it is supposed to be used with .035-.038 inch guide wires What is 2 rules for CMC's like spiral or lasso - Answer - 1. Only approved for use in LA due to chordae tendinea 2. Only rotate shaft clockwise Stereotaxis catheters - Answer - Have magnets in tip for maneuverability in response to changes in magnetic field What system remotely steers guided catheters - Answer - Hansen robotic system ACT for using array - Answer - ACT 250-300 bipolar cardiac electrodes record local _________ that occur during phase _______ - Answer - depolarizations / phase 0 surface EKG leads usually filtered at what - Answer - .1 - 100 Hz Normal EGM filter settings - Answer - 30 - 300 Hz

What to do if T waves interfere with A/V and why - Answer - Increase the high pass filter because T waves are lower frequency as well as far field Unipolar filter setting - Answer - .05 - 300 Hz How each is measured: Diagnostic catheter OD , Inflated balloon cath OD, Needle OD, Guide wire - Answer - Diag: Fr / Balloon: mm / Needle: gauge / GW: inch (thousandth of inches) Standard sizes of micropuncture introducer sets and their purpose - Answer - 21 gauge needle / .018 inch wire. Purpose of micropuncture introducer set is for placement of .035-.038 inch GW Best needle to use for pericardial space via subxyphoid approach - Answer - Tuohy needle which type of guide wire is 260-300 cm long? - Answer - exchange guide wires (much longer than diagnostic catheter) advantage of bipolar leads - Answer - less prone to EMI noise Unipolar leads more prone to - Answer - 1. EMI / muscle artifact oversensing 2. pectoralis muscle stimulation (pocket stim) Steroid tip leads reduce acute: - Answer - inflammation and stimulation threshold Best numbers for ventricular lead - Answer - Threshold <1 V / Sensing >4 mV programmed stimulation - Answer - Consists of incremental pacing and extrastimuli Sharp, curved GW used to go transseptal - Answer - SafeSept Guidewire Baylis NRG RF Transseptal needle has - Answer - Side holes for pressure and contrast Ultrasound transducers are composed of - Answer - Piezoelectric crystals How do ultrasound transducers work - Answer - Transducers convert one form of energy into another. Ultrasound transducers convert electric signals into ultrasonic energy. The ultrasonic energy is transmitted into tissues, bounces back and then is converted back to electric energy doppler transducer uses what - Answer - single piezoelectric crystal that sends and receives