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How do nitroglycerin pills stop angina?

April 26, 2017angina nitroglycerin pills

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How do nitroglycerin pills stop angina?

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Nitroglycerin tablets are “vasodilators” – that is, they increase the diameter of the arteries, improving blood flow to the heart and the rest of the body. They also dilate (open up) the veins and temporarily decrease the return of blood to the heart, and this eases the workload of the heart. Once enough blood returns to the heart muscle, angina symptoms stop. The heart’s workload also becomes easier, since it can pump blood without as much resistance from narrow blood vessels.