ECG 1a. The ECG above is from a 73 years-old man. It was recorded before the treadmil exercise test.


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ECG 1b. Above is his peak exercise ECG. Upsloping type ST segment depression is seen above.
Upsloping ST segment depression is not typical for myocardial ischemia.
His coronary angiogram showed normal coronary arteries.


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ECG 1c. Above is his ECG which was recorded at the second minute of the recovery phase. No further ECG abnormality is seen.

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ECG 2a. The ECG above is from a 52 years-old obese man.
It was recorded just before the onset of a treadmill exercise test.

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ECG 2b. The above ECG was recorded at the 6th minute of the test.
Upsloping type ST segment depression is seen.

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ECG 2c. Above is his ECG at the 7th minute of the test. He experienced chest pain at this time.
Upsloping type ST segment depression does NOT suggest ischemia.
Coronary angiography showed normal coronary arteries in this patient.

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