A nurse is monitoring a client who is on telemetry.
Which of the following findings on the ECG strip should the nurse recognize as normal sinus rhythm?
The QRS duration is 0.30 seconds.
The T wave is in the inverted position.
The P-R interval measures 0.32 seconds.
The P wave falls before the QRS complex.
The Correct Answer is D
Choice A rationale
A QRS duration of 0.30 seconds is abnormally long. The normal QRS duration is 0.06 to 0.12 seconds, indicating this is not normal sinus rhythm.
Choice B rationale
An inverted T wave is not a characteristic of normal sinus rhythm. It may indicate ischemia or other cardiac abnormalities.
Choice C rationale
A P-R interval of 0.32 seconds is prolonged. The normal P-R interval is 0.12 to 0.20 seconds, thus indicating an abnormal rhythm.
Choice D rationale
The P wave falling before the QRS complex is a key characteristic of normal sinus rhythm, representing the orderly conduction of electrical impulses from atria to ventricles. .
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Placing the patient in a left lateral position may not address the root cause of rapid, erratic electrical impulses. It stabilizes the airway but doesn't resolve the arrhythmia.
Choice B rationale
Initiating CPR and preparing for defibrillation are crucial. Rapid, erratic impulses suggest ventricular fibrillation, needing immediate CPR and defibrillation for survival.
Choice C rationale
Administering Furosemide, a diuretic, targets fluid overload but doesn't treat rapid, erratic electrical impulses like ventricular fibrillation, requiring immediate resuscitation.
Choice D rationale
A thorough assessment delays urgent intervention for life-threatening arrhythmias like ventricular fibrillation. Immediate CPR and defibrillation are essential for patient survival.
Correct Answer is B
Explanation
Choice A rationale
Anginal pain typically lasts less than 20 minutes. If chest pain exceeds this duration, it may suggest myocardial infarction or another severe cardiac event rather than stable angina pectoris.
Choice B rationale
Exertion increases myocardial oxygen demand, while anxiety triggers a sympathetic response, both of which can precipitate anginal pain due to the heart's inability to meet increased oxygen requirements.
Choice C rationale
Angina pectoris usually resolves with rest or administration of nitrates, which dilate coronary arteries and improve blood flow. Persistent pain may indicate unstable angina or myocardial infarction.
Choice D rationale
Anginal pain is often relieved by rest and the use of nitrates, not necessarily by changes in posture such as sitting up. This is more characteristic of pulmonary or pleuritic pain. .
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