IBHRE Questions with Detailed Verified Answers (100% Correct Answers) /Already Graded A+

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IBHRE Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
Lithium iodine battery V?

Ans: 2.8V- not used for ICDs due to low peak power. Qmr



Lithium Iodine/ silver V?

Ans: 3.2V Qhr- used for ICDS



Which is an example of a closed loop sensor?

Ans: myocardial contractility and O2 stat



Primary Sensor

Ans: detects changes in normal physiologic responses



Secondary

Ans: detects internal changes from exercise- QT MV pH



Tertiary

Ans: detects changes as a result of exercise- piezo accelerometer



The smaller the cathode surface the-

Ans: higher the current density, lower the threshold, and higher the
impedance (2-6mm as small as 1.2)



Sunday, 02 March 2025

, Anode should be how much bigger than the cathode?

Ans: 3xs (4-20mm in pacing leads)



ICD tip electrodes tend to run-

Ans: 2-10mm



Rv coil size?

Ans: 300-600mm



SVC coil size?

Ans: 400-860mm



OHMS LAW

Ans: V=I * R



ENERGY EQUATION (uJ)

Ans: V * I* PW



I is what?

Ans: Current- flow of electrons through a circuit



What can cause increase in threshold, wide QRS, latency, and

undersensing?



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