The nurse hears a S3 and lung crackles in a 75-year-old client with a recent myocardial infarction (MI). This indicates:
1. Heart failure.
2. Extension of the MI.
3. Renal failure.
4. Liver failure.
Heart failure.
Rationale: S3 and lung crackles are indications of heart failure. Manifestations of MI extension include chest pain and a return of positive laboratory finding (CPK-MB and troponin). Renal failure is a late complication of heart failure and is not manifested with an S3 and crackles. Liver failure is not manifested with an S3 and crackles.
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