A patient with newly diagnosed essential hypertension starts treatment with a commonly used antihypertensive drug at a dose that is considered to be therapeutic for the vast majority of patients. Soon after starting therapy the patient experiences crushing chest discomfort. ECG changes show myocardial ischemia. Studies in the cardiac catheterization lab show episodes of coronary vasospasm, and it is likely the antihypertensive drug provoke the vasospasm. Which antihypertensive drug most likely caused the ischemia and the angina? Atenolol Diltiazem Hydrochlorothiazide Lozartan

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