Recording and Analyzing an ECG Questions: 1) Compare the Q-T interval at rest to

Question

Recording and Analyzing an ECG Questions:

1) Compare the Q-T interval at rest to that after exercise. This interval corresponds closely to the duration of contraction of the ventricles. Describe and explain any difference.

2) Compare the duration in the period from the end of each T wave to the next P wave while a subject is at rest versus after exercise. Describe and explain any difference.

3) A patient presents with a P-R interval three times longer than the normal duration. What might be the cause of this abnormality?

Explanation / Answer

Compare the QT intervals in the data while the subject is at rest versus after exercise; this interval corresponds closely with the duration of contraction of the ventricles. Describe and explain any differences.

The QT interval was longer when lying down because the person is at rest and there is more time between contractions

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Compare the duration in the period of time from the end of each T wave to the next R-spike while the subject is at rest vurses after exercise. This interval corresponds closely with the duration of relaxation of the ventricles. Describe any differences

After exercise the end of the T to the next R is shorter because the heart is now beating faster to get more oxygen circulating to muscles. Ventricular relaxation is the shortest

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