Is it safe to have face/neck lift if a person has had several strokes?

Thank you for your question. You describe without submitting any photos that you had 4 strokes in the course of 5 years. You had surgery on the artery which contributed to the recurrent strokes. You’re aged 66, and asking if you’ll be safe to have a face and neck lift.
Generally, cosmetic surgical procedures are best performed in people who are at low risk for complications. When I see patients like yourself in my practice, they are often on blood thinners they rely on to maintain circulation. I modify different procedures depending on the desired outcome of the patient. For a procedure like facelift, you would need to be off of blood thinners prior to surgery. At the same time, you could still be at a higher risk for bleeding afterwards. I recommend you discuss this with your doctor how long it will be safe for you to be off of blood thinners, for example if you were to undergo colonoscopy or a dental procedure.
There are many options for people who are not good facelift candidates such as Structural Volumizing, which is a method of applying fillers to restore volume in the cheeks, chin, jawline and jaw angle such that it appears that a person had a facelift, but without surgery. This is not to be confused with a liquid facelift or any other injectable procedure that claims to create facelift results. Rather, this is a deliberate restoration of volume at the bone level which is responsible for a significant aspect of facial aging.
Depending on the degree of laxity of your skin in the cheek area resulting in jowls and sagging skin under the neck, it is conceivable that you would see a benefit from Structural Volumizing without surgery. However, if you do have significant amount of laxity in the face and neck, then you would be a better candidate for a face lifting procedure. Facelift surgeries can be performed in a wide range depending on the agreed upon anticipated results . As I mentioned earlier, in modified procedures with lower risk complications can be entertained and discussed with a doctor you meet in consultation. Thank you for your question.

Patient with significant medical conditions might be able to undergo cosmetic plastic surgery like facelift if and only if all her/his doctors clear the patient for surgery (e.g. cardiologist, neurologists, internist, etc). Also if the surgery is performed under anesthesia, the anesthesiologist has to weight the risk. Undergoing facelift under local anesthesia could help to omit the risks associated with general anesthetics. 

My initial bias would be to say you should be very cautious because your risk level is elevated on the surface.  Obviously, more information is required and an examination mandatory before a definitive answer is given.  However, the fact that you have had 4 strokes in the last half decade is suggestive of some form of cardiac, atherosclerotic, cerebrovascular, or coagulation disorder.  There is a very good chance that you are currently on anticoagulant therapy, which would need to be stopped prior to and after the surgery.  Whether or not this is possible would be up to the Physician managing your underlying condition.  However, if you are motivated, have a conversation with this Physician(s) about your intentions.