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IBHRE ATI questions and answers graded A+ 2025/2026
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IBHRE ATI questions and answers graded A+ 2025/2026
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IBHRE ATILead Insulation Optim
Silicone Rubber/Polyurethane 55D
Silicone Rubber
>15 yrs, bendy, repairable, thick, can tear/abrade
Flexibility & Biocompatabilty
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zero:02
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0:15
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Brainpower
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Polyurethane 55D
>12 years, much less flexible, now not repairable, thin, tear/abrade resistant, MIO, ESC
Durability & Lubricity
Polytetrafluoroethylene ePTFE
Gortex that eases boom in extractions reducing fibrous tissue on surprising coil and does no
longer effect DFT, turn white while wet, carbon backbone with fluorine atoms
High tensil power & flexibility
80A Polyurethane
Lead failure because of Metal Ion Oxidation
ESC
Cracking in polyurethane because of outside stresses
, MIO
Polyurethane degradation where moisture and steel ions act as catalyst
Most not unusual reasons of Safety Pacing
Ventricular Ectopy, Atrial lack of sensing
Egiloy
High thresholds & excessive polarization - cobalt, nickel, chromium, molybdenum, iron,
maganese
False Inhibition / Crosstalk
Sending of a paced sign inside the contrary chamber resulting in undesirable pacemaker
response
Ventricular Safety Pacing (VSP)
Following AP event, VSP c programming language is initiated following ventricular blanking-
If VS for the duration of VSP interval, VP can be brought quickly after
Phase zero of cardiac motion capacity
Depolarization (Na channels open)
Phase 2 of cardiac movement capacity
Plateau (Ca channels open)
Phase 1-3 of cardiac movement capacity
Repolarization (ABC - powerful, D - Relative)
PMT
Retrograde AS VP at MTR as a result of loss of AV synchrony
Crosstalk treatment
Reducing Atrial output, make v channel much less touchy, expand Vblanking
DFT & DBS
Silver middle conductor blended with MP35N for sturdy low resistance twine
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