Final answer:
The priority problem in a client diagnosed with CHF is the client's apical pulse rate of 64. Monitoring the pulse rate is important to assess the effectiveness of the heart's pumping action in congestive heart failure.
Step-by-step explanation:
The priority problem in the client diagnosed with CHF is option c, The client's apical pulse is 64.
In congestive heart failure (CHF), the heart's ability to pump blood efficiently is compromised, leading to a decrease in cardiac output. Monitoring the client's pulse rate is essential in assessing the effectiveness of the heart's pumping action. A low pulse rate, as indicated by a pulse of 64, could indicate poor cardiac output and inadequate perfusion to the body.
The other options, a, b, and d, are also important to consider, but they are not the priority problem in this case. Potassium level (option a) and digoxin level (option b) are relevant because both hypokalemia and digoxin toxicity can contribute to cardiac arrhythmias, which can worsen CHF. However, the priority is to assess the cardiac output and perfusion of the client, hence the apical pulse. The client denying yellow haze (option d) is not a priority problem in the context of CHF.