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. .
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Antiembolic stockings compress superficial veins, which may further limit blood flow to the already compromised peripheral arteries, exacerbating symptoms of peripheral arterial disease rather than alleviating them.
Choice B rationale
Elevating the legs above heart level reduces arterial perfusion to the extremities. In peripheral arterial disease, maintaining a position that allows gravity to assist arterial flow is beneficial, not restricting it.
Choice C rationale
Applying heat can dilate blood vessels and increase blood flow; however, it can also increase the risk of burns due to decreased sensation and poor skin integrity commonly seen in peripheral arterial disease patients.
Choice D rationale
A warm environment helps to prevent vasoconstriction. Cold temperatures can cause the arteries to constrict, reducing blood flow to the extremities. A consistent warm environment supports improved blood circulation.
Correct Answer is C
Explanation
Choice A rationale
Cold therapy is used for acute injuries to reduce swelling and pain but is not recommended for deep vein thrombosis (DVT) as it can cause vasoconstriction and worsen the condition.
Choice B rationale
Homan's sign is an outdated diagnostic tool for DVT as it is not reliable or specific and can result in false positives or negatives, thus not recommended for diagnosis.
Choice C rationale
Venous duplex ultrasound is the gold standard for diagnosing DVT as it visualizes blood flow and identifies thrombi within the veins, providing accurate and non-invasive detection.
Choice D rationale
Impedance plethysmography measures changes in blood volume but is less accurate than venous duplex ultrasound, and its use has declined in favor of more reliable imaging techniques.
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