Key result
The diagnostic accuracy of the two-step postexercise ECG is greatly enhanced when postexercise heart rate, degree of R-ST depression, and preexercise ECG abnormalities are considered.
Why the study?
Does the two-step postexercise ECG test accurately diagnose coronary artery disease compared to selective coronary cinearteriography in patients with chest pain syndromes?
Cross-Sectional (n=305)
Does the two-step postexercise ECG test accurately diagnose coronary artery disease compared to selective coronary cinearteriography in patients with chest pain syndromes?
The two-step postexercise ECG test remains a justified screening procedure for coronary artery disease when specific ECG and heart rate parameters are considered.
Refined two-step ECG interpretation may aid CAD screening; extends prior observations but leaves open prospective validation against modern imaging.
A total of 305 selected patients with chest pain syndromes were studied with both the two-step test and selective coronary cinearteriography. All patients were suspected clinically of having coronary artery disease. Subjects with positive responses were subdivided according to degree of ischemic R-ST depression, and those with negative responses according to immediate postexercise heart rate. Results of this study suggest that the diagnostic accuracy of a moderate stress test (such as the two-step) is greatly enhanced when postexercise heart rate, degree of R-ST depression, and presence of preexercise electrocardiographic abnormalities are considered. Retention of the two-step test as a screening procedure appears justified.
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Peter F. Cohn (1972) conducted a cross-sectional in Chest pain syndromes suspected of coronary artery disease (n=305). Two-step postexercise ECG vs. Selective coronary cinearteriography was evaluated on Diagnostic accuracy. The diagnostic accuracy of the two-step postexercise ECG is greatly enhanced when postexercise heart rate, degree of R-ST depression, and preexercise ECG abnormalities are considered.
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