A patient with angina and suspected pulmonary hypertension should receive which of the following medications to decrease SVR?

Sublingual nitroglycerin is the medication that effectively decreases systemic vascular resistance (SVR) in patients with conditions such as angina and suspected pulmonary hypertension. Nitroglycerin is a vasodilator, which means it relaxes and widens blood vessels, thereby allowing blood to flow more easily. This action helps to reduce the workload on the heart by lowering the resistance against which the heart must pump, ultimately alleviating angina symptoms and improving cardiac output and oxygen delivery to myocardial tissues.

In patients with pulmonary hypertension, the reduction in SVR from nitroglycerin can also help ease the strain on the heart, making it particularly valuable in managing the patient's symptoms and improving hemodynamic parameters. This vasodilatory effect is crucial in therapeutic scenarios involving elevated pressures within the pulmonary circulation.

While the other medications listed may have their own indications, they do not primarily focus on lowering SVR and managing angina symptoms as effectively as nitroglycerin does.