CCDS IBHRE ACTUAL EXAM 250 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A+|LATEST VERSION 2025

CCDS IBHRE ACTUAL EXAM 250 COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A+|LATEST VERSION 2025 Rheobase - ANSWER-the lowest point on a strength duration curve at an infinitely long pulse duration Chronaxie time - ANSWER-the pulse width at twice the rheobase value. It approximates the most efficient stimulation pulse duration Charge (formula) - ANSWER-Charge= I(current) x T(time) Furman's formula - ANSWER-Energy(microjoules)= I(current)xV(voltage)xT(pulse width) Ohms law formula - ANSWER-Voltage(electromotive force)= I(current/flow of electrons) x R(resistance to current flow in ohms) Functional Refractory Period - ANSWER-the coupling interval which first results in a measurable degree of delay in impulse conduction Effective Refractory Period - ANSWER-the longest coupling interval to be associated with block Devices with NO interaction with pacers - ANSWER-1. microwave oven, 2. CT scan/Ultrasound 3. Xrays (diagnostic) Devices that cause transient or 1 beat inhibition - ANSWER-1. EAS 2. Cellphones 3. Arc Welding 4. airport metal detector 5. TENS 6. Electric appliances such as electric blanket & power tools Devices that may damage the pacemaker - ANSWER-1. MRI 2. Defibrillator 3. Cardioversion 4. Cautery/RF Ablation 5. Radiation Therapy Resistance in Series - ANSWER-Series means the beginning of one resistance is connected to another Sum the resistances: R1+R2= total resista