Which finding during a preoperative assessment may increase the patient's risk for postoperative complications following cardiac surgery?

Choice A rationale Orthostatic hypotension is a drop in blood pressure upon standing, often side effects of medications like diuretics or antihypertensives. While it requires monitoring to prevent falls and ensure adequate perfusion, it does not typically pose as high a risk for major postoperative pulmonary or cardiac failure as chronic lung disease. It is a manageable hemodynamic variation that does not inherently indicate poor surgical outcomes if the patient is stable and well-hydrated. Choice B rationale A history of smoking and chronic obstructive pulmonary disease (COPD) significantly increases the risk of postoperative complications like pneumonia, atelectasis, and prolonged mechanical ventilation. COPD causes chronic inflammation, impaired gas exchange, and mucus hypersecretion. In the context of cardiac surgery, where general anesthesia and chest incisions are used, these patients have a much harder time clearing secretions and maintaining adequate oxygenation. This makes them highly susceptible to respiratory failure during the recovery phase. Choice C rationale Peripheral arterial disease (PAD) indicates systemic atherosclerosis, which means the patient may have concurrent coronary artery disease. However, if the PAD is currently asymptomatic, it represents a stable chronic condition rather than an immediate surgical red flag. While the surgical team will monitor distal pulses and perfusion, asymptomatic PAD is generally less of a predictor for immediate life-threatening postoperative complications compared to severe, underlying chronic obstructive pulmonary disease or active tobacco use. Choice D rationale Controlled hypertension without signs of end-organ damage suggests that the patient's cardiovascular system is currently stable and that their blood pressure is being managed effectively. Normal blood pressure ranges are typically less than 120/80 mmHg. Because there is no evidence of heart failure, renal impairment, or vascular remodeling, these patients generally tolerate the physiological stress of surgery well. It is considered a low-risk factor as long as the medication regimen is continued perioperatively.