Abnormal Scar Formation Following Open Heart Surgery
(Technically speaking, an open heart surgery is any procedure where the chest is opened, which certainly includes procedures beyond a heart bypass (a valve replacement, for example). However, because a heart bypass is the most common type of open heart surgery, for the purposes of this article, we will be using the terms "bypass" and "open heart surgery" interchangeably.)
You will have a scar following open heart surgery. In most cases, these scars will heal without any problems. However, it is possible that you will develop abnormal scars, especially if you have a history of keloids (excessive, thick scarring). Consultation with a dermatologist and discussion with your physician about your specific case are recommended if you are concerned about these issues.
The appearance of the scar will not predict the results of your operation. Even patients with enlarged scars can have excellent surgical results.