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[A comparative study on coronary angiography and exercise ECG testing]

L Wu1, J Zhang, G Shao

  • 1Department of Medicine, First Hospital of Beijing Medical University.

Zhonghua Nei Ke Za Zhi
|February 1, 1996
PubMed
Summary
This summary is machine-generated.

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Exercise ECG testing can help diagnose coronary artery disease (CAD) and assess its severity. Specific ST segment changes during exercise predict CAD, with higher positive rates for multi-vessel disease.

Area of Science:

  • Cardiology
  • Diagnostic Imaging
  • Exercise Physiology

Background:

  • Coronary artery disease (CAD) diagnosis relies on various methods.
  • Exercise electrocardiogram (ECG) testing is a non-invasive tool for assessing cardiac function during physical stress.

Purpose of the Study:

  • To evaluate the diagnostic accuracy of exercise ECG testing for coronary artery disease.
  • To determine the correlation between exercise ECG parameters and the severity of coronary artery disease.

Main Methods:

  • A comparative study involving 461 patients undergoing both coronary angiography and exercise ECG testing.
  • Analysis of ST segment depression (≥0.1 mV and ≥0.2 mV) and its correlation with coronary artery disease presence and extent.

Main Results:

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  • Exercise ECG testing demonstrated a sensitivity of 74.5% and specificity of 84.2% for predicting coronary artery disease.
  • A threshold of ST depression >0.2 mV showed 61.3% sensitivity and 79.1% specificity for predicting triple-vessel and left main coronary artery disease.
  • Workload, systolic blood pressure increment, and ST depression duration correlated with the number of diseased coronary arteries.

Conclusions:

  • Exercise ECG testing is valuable for diagnosing coronary artery disease and predicting its severity.
  • Specific exercise parameters, including ST segment changes, aid in assessing CAD extent.
  • Female patients exhibited a higher false-positive rate compared to males.