People with bad heart can’t do colonoscopy, especially the elderly patients if there is a clear presence of coronary artery disease, cardiac insufficiency or other organic cardiac lesions, as well as hypertensive patients whose blood pressure is not controlled up to standard, can’t do colonoscopy. Because of the bowel preparation before doing colonoscopy, the above patients may drink laxatives in the process of excretion will lead to aggravation of the condition, and may even induce heart failure. In case of hypertensive patients, it may cause further increase in blood pressure and hypertensive heart disease may also occur, which is very dangerous. In addition, because of the presence of abdominal pain or other symptoms of abdominal discomfort during colonoscopy, it may also lead to the aggravation of heart disease, so people with a bad heart should not do colonoscopy, and you can consult with the doctors at the Gastrointestinal Endoscopy Center.