The following Potassium channel opener is used in angina
Nicorandil, minoxidil, pinacidil are potassium channel openers used in angina which produce hyperpolarization. and causing the vasodilation and reducing the oxygen demand and increase the oxygen supply yo the infracted area. Ref: KD Tripathi 8th ed.
Nicorandil
Hydralazine
Fasudil
Ranolazine
Cardiovascular system