OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Treating Cardiovascular DiseaseIn coronary bypass surgery, a grafted blood vessel provides a route around the narrowed or blocked section. Both address the reduced blood supply, but they involve a procedure and carry risks, so they are not automatically the best option for everyone. Lifestyle changes and medicines may still be needed afterwards to reduce future risk.