Which finding would suggest to the nurse that the patient has a good cardiac reserve?
1. The patient is able to tolerate a gradual increase of pace during a treadmill exam.
2. The patient breathes in through the nose and out through the mouth when sitting quietly.
3. After cardiac rehabilitation exercises the patient sits in a chair to cool down.
4. The patient complains of pain in the legs after walking 100 yards.
1
Rationale 1: The heart's ability to respond to the body's changing need for cardiac output is called cardiac reserve. Increasing the pace of walking would place demand on the heart to increase blood flow.
Rationale 2: This action does not represent a physical demand on the heart and therefore does not test cardiac reserve.
Rationale 3: This action takes place after exercise so it does not represent a demand on the heart and does not test cardiac reserve.
Rationale 4: This physical demand results in intermittent claudication, but is not associated with cardiac reserve.
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