New Delhi, Jan 22, : Prime Minister Dr. Manmohan Singh is expected to go through a cardiac bypass procedure soon, after facing extensive medical tests at the All India Institute of Medical Sciences.

One of the source told that PM may have to undergo a fresh angioplasty or a bypass surgery in the next few weeks.

Though, Doctors attending to the Dr. Singh made it clear that he did not face any medical emergency.

Dr. Singh is a diabetic and has been controlling the condition with medicines and exercise like regular walking.

Dr. Singh, 76, underwent a cardiac bypass surgery in 1990 in UK, and angioplasty in Delhi in 2004 in which stents were introduced in his arteries.

Grafts, which were used to bypass the diseased vessel on Dr. Singh 18 years ago, have once again started to narrow. (ANI)