Asked for angiography after 9 months of bypass surgery, why?

I had angina, and was operated for CABG about 9 months back. I am leading a normal life now without any complication. Today I receved a call from my hospital (Punjab Institute of cardiology, Paklstan), that they wanted to have angiography on 14th June to assess the success of the operation. Why they have called me, I am quite confused.
I am walking 5 kms daily without any problem, have absolutly no symptoms of angina now. How the Hospital staff randomly choosed me or was it periodical check, I have no idea. Can some knowledgeable personality shed light on this issue.

this is not typical...I would contact your cardiologist or surgeon to ask questions as to why you were called....

I live in US,maybe things done diferently.ask if having no problems is this routine to do?perhaps ask another MD,second opinion,is this common practice.was anything unusual during your surgery that they are looking for? something experimental done or used?ask why,get 2 opinions,and follow advice... Report It

I am not so sure they want to assess the success of the operation you had about 9 months ago. It seems to me that the only reason they want to have you come in to have the angiogram done is because they are concerned about your blood vessels.

"The most common angiogram performed is to visualize the blood in the coronary arteries. A long, thin, flexible tube called a catheter is used so as to administer the radiocontrast agent at the desired area to be visualized. The catheter is threaded into an artery in the groin or forearm, and the tip is advanced through the arterial system into one of the two major coronary arteries. X-ray images of the transient radiocontrast distribution within the blood flowing within the coronary arteries allows visualization of the size of the artery openings. Presence or absence of atherosclerosis or atheroma within the walls of the arteries cannot be clearly determined. See coronary catheterization for more detail.

Angiography is also commonly performed to identify vessel narrowing in patients with retinal vascular disorders, such as diabetic retinopathy and macular degeneration."

Have you had any checkups with them since the day you were released from the hospital?