Ibhre drugs 1 - Study guides, Class notes & Summaries
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IBHRE QUESTIONS AND ANSWERS 2023
- Exam (elaborations) • 7 pages • 2023
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IBHRE QUESTIONS AND ANSWERS 2023 
Class I Drugs 
Sodium Channel blockers (Phase 0) 
 
 
 
Class II Drugs 
Beta blockers (SA/AV Node) 
 
 
 
Class III Drugs 
Potassium Channel blockers (Phase 3) 
 
 
 
Class IV Drugs 
Calcium Channel Blockers (Phase 2) 
 
 
 
Class V Drugs 
Digitalis (SA + AV Nodes) 
 
 
 
What is the most posterior structure of the heart? 
LA 
 
 
 
On an EKG, what structure is always negative? 
AVN 
 
 
 
Lead I: + aVF: + 
normal axis deviation 
 
 
 
Lead I: + aVF: - 
left axi...
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IBHRE 2023 questions I got wrong Questions Answered 100% correct
- Exam (elaborations) • 3 pages • 2023
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IBHRE 2023 questions I got wrong Questions Answered 100% correct 
Fluoroquinolones have been associated with what type of cardiac side effect? 
Prolongation of QT interval 
 
 
 
Which of the following lead insulation materials are known for reducing fibroblast in growth and susceptibility to MIO and ESC respectively 
ePTFE and 80A ployurethane 
 
 
 
Most common cause of safety pacing or ventricular safety standby 
Ventricular ectopy 
 
 
 
Electrode material that would most likely result in hi...
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IBHRE Review Questions and Answers 2023
- Exam (elaborations) • 11 pages • 2023
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IBHRE Review Questions and Answers 2023 
AV Node Reentry Tachycardia (AVNRT) 
- accounts for ~60% of arrhythmias presenting as SVT or paroxysmal atrial tachycardia (PAT) 
- affects all age groups and genders equally 
- no correlation with heart disease 
- heart rate 150-250 bpm, palpitations, light-headedness, near-syncope, narrow QRS complex 
 
 
 
rheobase 
lowest point on a strength duration curve at an infinitely long pulse duration; for cardiac pacing, the rheobase is usually reached betwee...
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IBHRE Study set Questions and Answers 2023
- Exam (elaborations) • 17 pages • 2023
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IBHRE Study set Questions and Answers 2023 
What lead insulation materials are known for reducing fibroblast in growth and susceptibility to MIO and ESC? 
ePTFE and 80A polyurethane 
 
 
 
What are the two most common causes of ventricular safety pacing ? 
Ventricular ectopy and loss of atrial sensing 
 
 
 
What electrode material would most likely result in higher pacing thresholds and high polarization? 
Elgiloy 
 
 
 
Which phase of the action potential would correlate to the relative refrac...
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