Open heart surgery is a broad term for any surgery where the chest is opened, and the heart is directly accessed. Bypass surgery is a specific type of open heart surgery. It creates new pathways for blood flow around blocked coronary arteries. Open heart surgery may involve valve repairs or other cardiac procedures, while bypass focuses solely on rerouting blood supply. Learn More :https://amcarehospital.com/understanding-difference-between-open-and-bypass-heart-surgery/