The following graph shows the fibrillation current versus shock duration. Thresh

Question

The following graph shows the fibrillation current versus shock duration. Thresholds for VF in animals for 60 Hz ac current. Duration of current (0.2 to 5 s) and weight of animal body were varied. (From L. A. Geddes, IEEE Trans. Biomed. Eng., 1973, 20, 465–468. Copyright 1973 by the Institute of Electrical and Electronics Engineers.) From your knowledge of cardiac electrophysiology, explain what rhythm would result from an intense 100 ms shock that occurred during (a) the P wave, (b) the R wave, (c) the T wave, and (d) diastole. From these results, explain the shape of the curves in the following graph.

Please show all work and write clearly. Thank you very much!

Explanation / Answer

the following graph shows the fibrillation current versus shock duration.thershold vf in animal is 60Hz.

current = 0.2 to 5s

animal body weight=94 kg

the P wave

the R wave

the T wave

diastole

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