Which of the following ECG changes is one of the earliest to occur during an infarction, but may have resolved by the time the patient seeks medical assistance?

Question

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Hyperacute T waves are sometimes called "tombstone" T waves and typically measure more than 50% of the preceding R wave. In addition to an increase in height, the T wave becomes more symmetric and may become pointed. These changes are often not recorded on the ECG because they have typically resolved by the time the patient seeks medical assistance.

Which of the Following ECG Changes Is One of the Earliest