ECG 1a. The ECG above is from a man with typical retrosternal chest pain.
It was recorded just before the onset of medical therapy:
Leads aVR and aVL show ST segment elevation while most other derivations show ST segment depression .

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ECG 1b. The ECG above belongs to the same patient. It was recorded 40 minutes after the onset of medical therapy.
The ST segment deviation is lessened now.

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ECG 1c. The ECG above is from the same patient. It was recorded at 3 hours after the onset of medical therapy.
ST segment deviations are not seen anymore.

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ECG 2. The ECG above is from a man with chest pain and elevated cardiac enzymes.
Anterior leads show ST segment depression and negative T waves.
Coronary angiography on the same day showed 3 vessel disease and bypass surgery was advised to him.

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ECG 3. Above ECG is from a 61 years-old woman with chest pain and elevated cardiac enzymes.
Leads III and aVF show negative T waves while leads V4 and V5 show ST segment depression.
Coronary angiography was performed immediately after recording of this ECG and
extensive 3 vessel disease was diagnosed. Coronary bypass surgery was advised to her.

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ECG 4. The ECG above belongs to an 85 years-old man with COPD.
He was hospitalized because of severe dyspnea but did not complain of chest pain.
Elevated cardiac enzymes suggested nonST elevation myocardial infarction.
Many leads show ST segment depression while leads V1 to V3 and aVR show ST segment elevation.
He is not under Digoxin therapy.
His corrected QT interval was measured as 447 mseconds.
The last beat of the limb lead recording is an end-diastolic VPC.

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ECG 5a. Above is the admission ECG of a 67 years-old man with the complaint of chest pain.

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ECG 5b. The ECG above belongs to the same patient. It was recorded on the second day, during an episode of chest pain.
Leads V5 and V6 show ST segment depression during chest pain.
His Troponin I level was elevated (non-ST elevation myocardial infarction).
Coronary angiography on the same day showed significant multiple stenoses in distal half of the LAD.

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ECG 5c. The above ECG belongs to the same man. It was recorded during a chest pain episode (8 days after the ECG 5b).
Widespread ST depression and a VT run is seen.

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ECG 5d. The ECG above belongs to the same man. It was recorded 3 hours after the ECG 5c.
Now, the patient is pain free. ST depression and VT run are not seen anymore.

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ECG 6. The ECG above belongs to a 68 years-old man who was admitted to the Cardiology outpatient clinic.
He did not complain of typical chest pain, rather he said that he felt "something abnormal in his chest" (unrelated to exertion)
during the last four days.
His symptoms peaked on the fourth day (at the time of admission to Cardiology outpatient clinic).
Leads V3 to V5 shows mild downsloping ST segment depression.
The patient underwent urgent coronary angiography which showed significant stenoses of the RCA and LAD coronary arteries,
and total occlusion of the first Diagonal branch of the LAD.
Laboratory analysis showed mild elevation of cardiac Troponin I and CK-MB.
The patient had experienced Unstable Angina pectoris in the first three days which later evolved to non-ST elevation
myocardial infarction in the fourth day.

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