For an extra blood vessel in the heart, if it is caused by acquired treatment, it is generally not serious; however, if it is caused by congenital heart malformation, it is relatively serious. 1. Not serious: due to cardiac bypass surgery, through the artificial implantation of an artificial blood vessel, to restore the normal blood supply to the heart; and cardiac bypass surgery will not need to worry too much about this artificial blood vessel on the human body will not cause significant harm, so it is generally not serious. 2. Serious: due to abnormal heart development, the heart is born with an extra blood vessel, such as coronary artery fistula, so that the coronary artery to the atrium, ventricle or pulmonary artery has produced a redundant blood vessel, which may lead to ischemia of the heart, and may cause myocardial infarction and heart failure, thus threatening the patient’s life, so it is relatively serious. One more blood vessel in the heart should be clear as soon as possible, if necessary, follow the doctor’s instructions to standardize the treatment, so as not to threaten the patient’s life.