The nurse is assessing the cardiac rhythm of a client who is admitted with coronary artery disease. The nurse notes that the PR interval is 0.24 and the QRS interval is 0.10. Which interpretation would be appropriate for the nurse to make

First degree heart block

Second degree heart block

Bundle branch block

Sinus arrhythmia

Answer and Explanation

The Correct Answer is A

A. First-degree heart block: A prolonged PR interval greater than 0.20 seconds, as seen in this case, indicates first-degree heart block, which is a delay in conduction at the AV node.

B. Second-degree heart block. Second-degree heart block is characterized by some PR intervals being prolonged with occasional dropped beats (non-conducted P waves).

C. Bundle branch block. Bundle branch block causes a wide QRS complex (greater than 0.12 seconds), which is not seen here.

D. Sinus arrhythmia. Sinus arrhythmia involves changes in heart rate due to respiratory cycles, not prolonged PR intervals.

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Correct Answer is B

Explanation

A. Decerebrate posturing: This involves extension and outward rotation of the arms, which is not observed here.

B. Decorticate posturing: Internal rotation, adduction, and flexion of the arms are characteristic of decorticate posturing, indicating damage to the corticospinal tract.

C. Flexion withdrawal: This refers to pulling away from a painful stimulus and does not involve the described pattern of movement.

D. Localization of pain: This is an intentional movement toward the source of pain, which is not demonstrated in this scenario.

A. Hypothermia B. Calcium channel blockers medications C. Athletic conditioning D. Beta-blocker medications E. Hyperthyroidism

Correct Answer is ["A","B","C","D"]

Explanation

A. Hypothermia: Hypothermia can slow the heart rate, leading to bradycardia.

B. Calcium channel blockers medications: These medications can slow the conduction through the AV node, causing bradycardia.

C. Athletic conditioning: Athletes often have a lower resting heart rate due to increased parasympathetic tone, which can lead to sinus bradycardia.

D. Beta-blocker medications: Beta-blockers decrease heart rate by blocking the effects of adrenaline on the heart.

E. Hyperthyroidism: Hyperthyroidism usually leads to tachycardia, not bradycardia, due to increased metabolism.

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The nurse is assessing the cardiac rhythm of a client who is admitted with coronary artery disease. The nurse notes that the PR interval is 0.24 and the QRS interval is 0.10. Which interpretation would be appropriate for the nurse to make

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