Answer
Glyceryl trinitrate reduces the heart’s oxygen demand by relaxing vascular smooth muscle, dilating veins to reduce venous return and preload, and relaxing arterioles to reduce systemic vascular resistance and afterload.
Sources for this answer
- Glyceryl Trinitrate 5 mg/ml Sterile ConcentrateHospira UK Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 17Document updated
Sources checked