Nitroglycerine exes beneficial effect in classical angina pectoris primarily by
nitrates are vasodilators mainly acting on the veins only. hence they are venous dilators therefore decrease the preload on the hea where as aerial dilators like hydralazine decrease the after load. Ref: KD Tripathi 8th ed.
Increase in total coronary blood flow
Redistribution of coronary blood flow
Reduction of cardiac preload
Reduction of cardiac afterload
All India exam