Does gas in stomach or bloating affects your heart, is it dangerous?

NO, gas in stomach does not affect the heart adversely. Nor is gas per se dangerous, For info on Flatulence: https://www.niddk.nih.gov/health-information/digestive-diseases/gas-digestive-tract/eating-diet-nutrition. Wish you good health!

No, gas formation is not affecting the heart directly and it is not likely to be dangerous as it reflects a degree of indigestion most times. Try a low FODMAP diet, talk to your doc if symptoms persist.