ECG 16a. The ECG above belongs to a 49 years-old with intermittent chest pain.
It was recorded just before the onset of his treadmill exercise test.
Inferior (II, III and aVF) and lateral (V5, V6) leads show ST segment depression.

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ECG 16b. The ECG above belongs to the same patient.
It was recorded at the 6th minute of his treadmill exercise test.

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ECG 16c. The ECG above belongs to the same patient.
It was recorded at the 9th minute of his treadmill exercise test.
Inferior (II, III and aVF) and lateral (V5, V6) leads show further ST segment depression.

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ECG 16d. The ECG above belongs to the same patient.
It was recorded at the peak exercise (9th minute, 37th second) of his treadmill exercise test).
He felt shortness of breath, and the treadmill was stopped after recording the above ECG.

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ECG 16e. The ECG above belongs to the same patient.
It was recorded at the 1st minute of the recovery period after his treadmill exercise.
Inferior (II, III and aVF) and lateral (V5, V6) leads still show ST segment depression.

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ECG 16f. The ECG above belongs to the same patient.
It was recorded at the 2nd minute of the recovery period after his treadmill exercise.
The patient underwent coronary angiography after this test.

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Images from his coronary angiography show significant stenosis of the Circumflex (Cx) coronary artery.



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