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Related Experiment Videos

Core and peripheral temperature response to exercise in patients with impaired left ventricular function

M J Griffin1, J J O'Sullivan, A Scott

  • 1Department of Cardiology, St Vincents Hospital, Dublin, Ireland.

British Heart Journal
|May 1, 1993
PubMed
Summary

Monitoring skin temperature during exercise is a sensitive indicator of impaired cardiac output in patients with heart disease. Abnormal peripheral temperature changes can detect exercise-induced ventricular dysfunction.

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Area of Science:

  • Cardiology
  • Exercise Physiology
  • Thermoregulation

Background:

  • Exercise-induced hypotension is an insensitive marker for severe coronary artery disease.
  • Skin blood flow is regulated by baroreceptor and thermoregulatory reflexes.
  • Skin temperature monitoring may offer a more sensitive indicator of impaired cardiac output during exercise.

Purpose of the Study:

  • To investigate the sensitivity of skin and central temperature changes during exercise as indicators of impaired cardiac output response.
  • To compare thermoregulatory responses between normal individuals and patients with impaired ventricular function.

Main Methods:

  • Studied central and skin temperature changes during a modified Bruce protocol in 10 normal volunteers and 8 patients with ischemic heart disease.

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  • Utilized a two-sample independent t-test to compare temperature data at intervals during and after exercise.

    • Main Results:

    • Patients with impaired ventricular function showed a significant decrease in central body temperature during exercise, unlike normal subjects.
    • Skin temperature declined significantly in patients during exercise, differing from normal responses.
    • Patient skin temperatures were significantly lower than normal from six minutes of exercise onwards.

    Conclusions:

    • Abnormal peripheral temperature changes during exercise are an early, sensitive indicator of abnormal hemodynamic response in patients with impaired ventricular function.
    • Skin temperature measurement during exercise may aid in detecting exercise-induced ventricular dysfunction or impaired cardiac output from valvular heart disease.