A patient's heart monitor shows HR 78 with progressive lengthening of the PR interval over time. What is the most appropriate action for the nurse to take next?

Rationale:
A. While dehydration or hypovolemia can lead to tachycardia as the body attempts to maintain cardiac output, it does not typically cause bradycardia. Bradycardia usually results from conduction abnormalities, medications, or increased vagal tone rather than low fluid volume.

B. Anxiety triggers sympathetic nervous system activation, which increases heart rate and blood pressure. Therefore, it is more likely to produce tachycardia rather than a slow heart rate.

C. Bradycardia reduces cardiac output, which lowers cerebral perfusion. This decrease in blood flow to the brain commonly manifests as dizziness, lightheadedness, fainting, or syncope. These symptoms are critical for assessing the clinical significance of bradycardia, especially in older adults or those with cardiovascular disease.

D. Fever increases metabolic demand, leading to compensatory tachycardia, not bradycardia. A slow heart rate in a febrile client would be atypical and may suggest other underlying conditions, such as conduction disorders or drug effects.

Rationale:

A. This statement demonstrates that the client understands the importance of activity pacing and energy conservation, which is essential in managing congestive heart failure (CHF) to prevent overexertion and exacerbation of symptoms.

B. Clients with CHF should weigh themselves daily at the same time each day to detect early signs of fluid retention and worsening heart failure. Weekly monitoring is insufficient.

C. Sodium restriction is a critical part of CHF management because excess sodium contributes to fluid retention and worsening edema. This statement indicates a misunderstanding of dietary recommendations.

D. Diuretics are typically taken in the morning to prevent nocturia and sleep disruption. This statement reflects an incorrect understanding of medication timing.