Based on this rhythm strip, which interpretation should the nurse make?
Junctional tachycardia.
Second degree Type II atrioventricular (AV) block (3 to 1).
Ventricular fibrillation.
Atrial flutter.
The Correct Answer is D
A. Junctional tachycardia: Junctional tachycardia originates from the AV node, typically with a narrow QRS, absent or inverted P waves, and a rate of 100–180 bpm. The strip does not show these features.
B. Second-degree Type II AV block (3:1).Type II AV block (Mobitz II) shows dropped QRS complexes with constant PR intervals before conducted beats. This strip does not show missing QRS complexes in a 3:1 pattern.
C. Ventricular fibrillation. VF is characterized by a chaotic, disorganized rhythm with no discernible P waves, QRS complexes, or T waves, completely different from this organized flutter pattern.
D. Atrial flutter is characterized by regular, rapid atrial depolarizations (flutter waves) at a rate of 250–350 bpm. These waves create a "sawtooth" pattern on the ECG.The ventricular response may be regular or irregular, depending on AV conduction. This is different from atrial fibrillation (which has irregularly irregular R-R intervals and no discrete P waves).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Apply high-flow oxygen by face mask. The client is in respiratory distress with absent breath sounds over the left lung field, which is highly suggestive of a pneumothorax or hemothorax. High-flow oxygen helps improve oxygenation while preparing for definitive intervention. In cases of tension pneumothorax, oxygen can help reduce hypoxia until a chest tube or needle decompression is performed.
B. Obtain a chest tube insertion kit. Absent breath sounds on one side following chest trauma strongly suggest a pneumothorax or hemothorax, requiring immediate chest tube placement to re-expand the lung and restore normal ventilation. The nurse should ensure that the equipment for thoracostomy (chest tube insertion) is readily available for the healthcare provider.
C. Withhold narcotic pain medication. Pain control is important in trauma patients, as uncontrolled pain can lead to shallow breathing, atelectasis, and respiratory complications. Narcotics should be used cautiously in clients with respiratory distress, but they are not contraindicated if given at appropriate doses with close monitoring.
D. Elevate the head of the bed 45 degrees. Clients with respiratory distress should be positioned with the head of the bed elevated to improve lung expansion. However, in a suspected pneumothorax, the priority is oxygenation and chest tube insertion. If there is hemodynamic instability, the client may require a flat or semi-Fowler’s position instead.
E. Place client in Trendelenburg position. The Trendelenburg position (head down, feet up) is not appropriate in chest trauma patients. This position can increase intra-abdominal pressure, worsen breathing difficulty, and impair lung expansion. It is typically avoided in clients with respiratory distress or suspected pneumothorax.
Correct Answer is D
Explanation
A. Prepare to give phenytoin IV as prescribed. Phenytoin is used for seizure prophylaxis in clients with moderate to severe head injuries (GCS ≤ 8–10). A GCS score of 14 indicates mild head injury, and prophylactic anticonvulsants may not be necessary unless ordered for specific risk factors.
B. Perform a substernal rub to evoke a response to pain. A substernal rub (painful stimulus) is used to assess response in unconscious or unresponsive clients (GCS ≤ 8). With a GCS of 14, the client is alert or nearly fully conscious, making a painful stimulus unnecessary and inappropriate.
C. Promptly notify the healthcare provider (HCP) of the GCS score. A GCS of 14 is not a critical or emergency finding, as it indicates mild neurological impairment. While the HCP should be updated on significant changes, routine monitoring is sufficient unless deterioration occurs.
D. Continue monitoring the client's GCS score every 2 hours. Frequent neurological assessments are crucial in head injury management to detect worsening conditions like increasing intracranial pressure (ICP) or cerebral edema. Monitoring the GCS every 2 hours ensures timely intervention if the client’s condition changes.
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