The nurse is assessing a patient in an outpatient clinic. Which patient statement best indicates left-sided heart failure?

Choice A reason: Increased fluid intake may be associated with dehydration, diabetes, or other systemic issues but is not a hallmark symptom of left-sided heart failure. It lacks specificity to cardiac function. Choice B reason: Nocturia (nighttime urination) is more commonly associated with right-sided heart failure due to fluid redistribution when lying down. It can also be seen in other conditions such as diabetes or prostate issues. Choice C reason: Dyspnea on exertion, such as needing to stop halfway up the stairs to catch breath, is a classic symptom of left-sided heart failure. It reflects pulmonary congestion due to impaired left ventricular function, which leads to fluid backup in the lungs. Choice D reason: Blurred vision is not a typical symptom of heart failure. It may be related to hypertension, diabetes, or neurological conditions but does not directly indicate cardiac dysfunction.