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Angina pectoris is thoracic pain caused by a fleeting deficiency in oxygen delivery to the myocardium. Because nitroglycerin acts as a vasodilator, blood flow to the heart is increased, promoting the delivery of oxygen to the cells.

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Q: A patient takes a nitroglycerine tablet sublingually for chest pain Nitroglycerin acts directly on smooth muscle producing relaxation and vessel dilation How would this relieve chest pain?
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