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Question

In normal ECG, the component that signifies duration of one cardiac cycle is ______.

A
Q-T interval
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B
P-R interval
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C
S-T segment
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D
R-R interval
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Solution

The correct option is D R-R interval
The RR interval is the time elapsed between two successive R waves of the QRS signal on the electrocardiogram is a function of intrinsic properties of the sinus node as well as autonomic influences.
So, the correct answer is option D.

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