Action of Nitroglycerin is______________?
Correct answer: A. Direct action on smooth muscle
- A. Direct action on smooth muscle
- B. Slows SA node conductivity
- C. Blocks arrhythmia
- D. Increases perfusion to heart
Explanation
Nitroglycerin releases nitric oxide, increasing cyclic GMP and directly relaxing vascular smooth muscle, especially veins. Its main haemodynamic effect is reduced preload, although it can also improve coronary perfusion in ischaemic regions.
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