Final answer:
For a patient experiencing angina-like symptoms, nitroglycerin is commonly administered sublingually to relieve chest pain by dilating coronary vessels and improving blood flow to the heart.
Step-by-step explanation:
When a patient with a known history of angina is experiencing symptoms similar to a heart attack, the immediate treatment typically includes medications that alleviate chest pain and improve heart function. One of the key medications administered is nitroglycerin, which is given sublingually to allow for rapid absorption. Nitroglycerin works by releasing nitric oxide, which serves as a vasodilator, relaxing the smooth muscles in the coronary vessels and increasing blood flow to the heart muscle, thereby relieving the symptoms of angina. In addition, aspirin may be given to help break up blood clots, further aiding in the treatment process. For long-term management, other medications such as statins to lower cholesterol, beta-blockers, calcium channel blockers, antiplatelet drugs, and interventions like angioplasty or coronary bypass surgery might be considered depending on the severity of the condition.