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Exercise ECG changes in normal women.

G R Cumming, C Dufresne, J Samm

Canadian Medical Association Journal

|July 21, 1973

Summary

This summary is machine-generated.

Exercise electrocardiogram (ECG) changes in women aged 40-60 are common but often not indicative of coronary heart disease. Current exercise ECG tests lack reliability for diagnosing chest pain or screening healthy women for heart disease.

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Area of Science:

Cardiology
Exercise Physiology
Diagnostic Imaging

Background:

Submaximal and maximal exercise testing is used to assess cardiovascular health.
Electrocardiogram (ECG) changes during exercise can indicate myocardial ischemia.
Previous research on exercise ECG patterns in women is limited.

Purpose of the Study:

To evaluate the incidence of ischemic ECG patterns during exercise in women.
To determine the diagnostic reliability of exercise ECG for chest pain in women.
To assess the utility of exercise ECG for screening asymptomatic women for coronary heart disease.

Main Methods:

357 women without a history of cardiovascular disease underwent exercise testing (bicycle ergometer and/or treadmill).
Bipolar ECG lead CM(5) was used for monitoring during exercise.

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Exercise ECG patterns were analyzed for ischemic changes.

Main Results:

The incidence of ischemic ECG patterns in women aged 40-60 ranged from 20% to 50%.
Most observed ECG changes were not attributed to occult coronary disease, given the low expected prevalence.
Exercise ECG changes in women showed low reliability for diagnosing chest pain or screening.

Conclusions:

Exercise-induced ischemic ECG patterns are frequent in middle-aged women but often do not signify underlying coronary artery disease.
Current exercise ECG protocols are unreliable for diagnosing chest pain or screening healthy women for heart disease.
Further research is needed to develop reliable non-invasive methods for assessing cardiovascular risk in women.