NREMT Paramedic Level Quiz
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A patient is stabbed in the chest to the left of the sternum. He presents with a BP of 80/60 mmHg, heart rate of 130 bpm, and significant JVD. The cardiac monitor shows sinus tachycardia with a beat-to-beat variation in the height of the QRS complexes.
The described ECG finding is known as electrical alternans and is a highly specific sign for:
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