CCDS IBHRE EXAM LATEST
Rheobase - CORRECT ANSWER the lowest point on a strength duration curve at an infinitely long pulse duration Chronaxie time - CORRECT ANSWER the pulse width at twice the rheobase value. It approximates the most efficient stimulation pulse duration Charge (formula) - CORRECT ANSWER Charge= I(current) x T(time) Furman's formula - CORRECT ANSWER Energy(microjoules)= I(current)xV(voltage)xT(pulse width) Ohms law formula - CORRECT ANSWER Voltage(electromotive force)= I(current/flow of electrons) x R(resistance to current flow in ohms) Functional Refractory Period - CORRECT ANSWER the coupling interval which first results in a measurable degree of delay in impulse conduction Effective Refractory Period - CORRECT ANSWER the longest coupling interval to be associated with block Devices with NO interaction with pacers - CORRECT ANSWER 1. microwave oven, 2. CT scan/Ultrasound 3. X-rays (diagnostic)
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