A patient with new-onset exertional angina has taken three nitroglycerin sublingual tablets at 5-minute intervals,but the pain has intensified. The nurse notes that the patient has a heart rate of 76 beats per minute and a blood pressure of 120/82 mm Hg. The electrocardiogram is normal. The patient's lips and nail beds are pink,and there is no respiratory distress. The nurse will anticipate providing:

Question

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This patient has unstable angina,and the next step,when pain is unrelieved by sublingual nitroglycerin,is to give intravenous nitroglycerin and a beta blocker. ACE inhibitors should be given to patients with persistent hypertension if they have left ventricular dysfunction or congestive heart failure (CHF). Ranolazine is a first-line angina drug,but it should not be given with quinidine because of the risk of increasing the QT interval. Supplemental oxygen is indicated if cyanosis or respiratory distress is present. IV morphine may be given if the pain is unrelieved by nitroglycerin.

A Patient with New-Onset Exertional Angina Has Taken Three Nitroglycerin