Practice Question
A nurse is assisting with the care of a client who was admitted to the telemetry unit after experiencing chest pain, dyspnea, and diaphoresis. Which of the following ECG findings is a manifestation of acute myocardial infarction?
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Correct Answer:
The ST segment is above the isoelectric line.
Rationale:
🔷 Acute myocardial infarction (MI) typically manifests on ECG as ST-segment elevation, indicating acute injury to myocardial tissue. The elevation represents ongoing ischemia and myocardial cell death due to coronary artery blockage.
🔷 PR interval of 0.15 seconds is within the normal range (0.12–0.20 seconds) and does not indicate MI.
🔷 QT interval equal to the R-R interval is not a diagnostic finding for MI; prolonged QT intervals are usually associated with electrolyte imbalances or certain medications.
🔷 QRS interval of 0.08 seconds is normal (0.06–0.10 seconds) and not indicative of acute MI.
🔷 ST-segment elevation is the hallmark of ST-elevation myocardial infarction (STEMI), which requires immediate intervention such as reperfusion therapy.
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This question is from ATI LPN Mental Health Exam-2024 which contains 38 questions.
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Question Details
- Category: LPN Nursing Exam(s)
- Subcategory: LPN ATI Exams
- Domain: Mental Health
- Answer Choices: 4