A nurse is reviewing a client's ECG rhythm strip. Which of the following components should the nurse use to measure impulse conduction from the sinus node through the atrioventricular node?
ST segment
QRS complex
PR interval
PP interval
The Correct Answer is C
A. ST segment: The ST segment represents the period between the end of ventricular depolarization and the beginning of ventricular repolarization. It does not reflect impulse conduction from the sinus node to the atrioventricular (AV) node.
B. QRS complex: The QRS complex represents ventricular depolarization and does not reflect impulse conduction through the atria or the AV node. It mainly reflects the electrical activity of the ventricles.
C. PR interval: The PR interval measures the time it takes for the electrical impulse to travel from the sinus node through the atria and AV node before reaching the ventricles. It is the most appropriate component for evaluating impulse conduction from the sinus node through the AV node.
D. PP interval: The PP interval measures the time between successive P waves, which corresponds to the time between atrial depolarizations. It does not specifically reflect conduction through the AV node.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Have the client identify stressful situations: While identifying stressful situations is important for stress management, it is not a specific treatment method for fibromyalgia. Stress reduction is part of management but is not the primary intervention for chronic pain.
B. Encourage the client to participate in yoga: Yoga is an excellent alternative treatment for fibromyalgia and chronic pain. It helps improve flexibility, reduce stress, and promote relaxation. It has been shown to improve pain, sleep, and quality of life for individuals with fibromyalgia.
C. Instruct the client to limit visitors: Limiting visitors is not a standard recommendation for treating fibromyalgia. Social support can be beneficial for emotional well-being, and there is no evidence suggesting that limiting social interactions improves fibromyalgia symptoms.
D. Advise the client to take walks regularly: Light physical activity like walking can be helpful for overall health. While walking can be part of an overall exercise plan, yoga is more directly beneficial for chronic pain in fibromyalgia.
Correct Answer is D
Explanation
A. Blood pressure 140/90 mm Hg: This blood pressure reading is elevated but does not specifically suggest a pulmonary embolism (PE). It could be due to other factors such as anxiety or pain, and it is not a primary indicator of PE.
B. Respiratory rate 12/min: A respiratory rate of 12/min is within the normal range (12-20 breaths per minute). A PE typically causes an increased respiratory rate as the body attempts to compensate for impaired oxygenation: normal respiratory rate does not suggest PE.
C. Temperature 40° C (104° F): A fever of 40° C (104° F) is significantly elevated and suggests an infection or inflammation. While a PE can cause mild fever, a temperature of 40° C is more commonly associated with infection rather than a pulmonary embolism.
D. Heart rate 120/min: A heart rate of 120/min is indicative of tachycardia, which is a common response to a pulmonary embolism. The body tries to compensate for reduced oxygenation by increasing heart rate. Tachycardia, along with other symptoms such as shortness of breath and chest pain, is a key indicator of PE.
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