RN Nursing · Dysrhythmias · Practice question
While turning a monitored patient, the Electrocardiogram (ECG) suddenly becomes a flat line. The patient is awake and talking. Best initial action?
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Begin chest compressions
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Defibrillate immediately
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✓
Check lead connections and confirm rhythm in a second lead
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Give 1 mg epinephrine IV
Answer & explanation
Correct: Check lead connections and confirm rhythm in a second lead
When an ECG monitor suddenly shows a flat line but the patient is awake and talking, the clinical picture is inconsistent with true asystole. A conscious, communicative patient cannot be in cardiac arrest. The most probable explanation is a technical artifact, such as a loose or disconnected electrode lead, which commonly occurs when repositioning a patient. The appropriate first action is to check all lead connections and verify the rhythm in a second lead to confirm or rule out a true dysrhythmia. Beginning chest compressions on an awake patient would cause harm and is never appropriate. Immediate defibrillation is indicated for ventricular fibrillation or pulseless ventricular tachycardia, not for a flat line artifact in a conscious patient, and is also contraindicated here. Administering epinephrine would be part of a cardiac arrest algorithm only after true pulseless electrical arrest or asystole is confirmed. The cardinal rule in ECG interpretation is to always treat the patient, not the monitor. Because the patient shows no signs of hemodynamic compromise, the nurse must first assess the equipment before escalating to resuscitative interventions. Confirming the rhythm in a second lead also helps distinguish asystole from very fine ventricular fibrillation, which would require a different intervention. Technical troubleshooting is the safe, logical, and clinically sound first step in this scenario.
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