Electrocardiograms (EKGs or ECGs) are used by physicians to study the relative h

Question

Electrocardiograms (EKGs or ECGs) are used by physicians to study the relative health of a patient's heart. The figures below indicate part of a complete EKG for a particular healthy patient. Source: RnCeus.com. The x-axis is time and the y-axis is voltage. a. A patient's heart rate can be determined by the formula R 300/N, where N is the number of large squares between QRS complexes, or cycles of the heart. Find the heart rate for this particular patient. b. Comment on whether the graph above actually represents a continuous function.

Explanation / Answer

Hi,

The heart beat is calculated by counting the number of squares between the two large spikes also called R spike. RR distance is 3 boxes. So heart beat = 300/3=100.

The pattern of heart spikes is regular. The intervals between RR is constant. The alone amplitude is also regular. So it is a healthy heart pattern and is continuous function.

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