Obtaining a 12-lead ECG before treating ST segment elevation is important because:
1. The abnormality will subside and an important diagnostic indicator is lost.
2. There is no importance; an ECG may be obtained after treatment has been initiated.
3. It determines the mortality rate for MIs.
4. It is associated with Q wave changes.
The abnormality will subside and an important diagnostic indicator is lost.
Rationale: Once the cardiac ischemia has subsided due to treatment, the ST segment changes disappear. Therefore, it is essential that the 12-lead ECG is obtained prior to treatment. Q wave changes indicate necrosis and will be with the client for the remainder of his or her life. ST segment elevation in and of itself does not determine mortality.
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