What Is Coronary Bypass
Surgery (CABG)?
Coronary Artery Bypass Grafting (CABG) — or bypass surgery — treats severe coronary artery disease (blocked heart arteries) by creating a new path for blood to flow around the obstruction. A blood vessel from another part of the body — the chest, wrist, or leg — is grafted onto the blocked coronary artery, bypassing the blockage and restoring oxygen-rich blood supply to the heart muscle.
CABG is performed when coronary artery disease is too severe for angioplasty and stenting alone, or when multiple arteries are blocked (multi-vessel disease), or when previous stents have failed. It is one of the most evidence-based and durable treatments for coronary artery disease — with results that last 10–20+ years in most patients.
KG Hospital performs bypass surgery through four different approaches — conventional open-heart CABG, beating-heart OPCAB, minimally invasive MICS CABG, and Robotic CABG. No other hospital in Coimbatore offers all four.
All Four Bypass Surgery
Approaches at KG Hospital
Your cardiac surgeon will recommend the approach that best balances clinical outcome, risk profile, and recovery for your specific anatomy and condition. Each approach has distinct advantages.
Conventional CABG (On-pump)
Standard bypass surgery using the heart-lung machine (cardiopulmonary bypass). The heart is temporarily stopped while grafts are attached. Excellent clinical results across a wide range of patients. Most widely applicable approach.
StandardOPCAB — Beating Heart Surgery (Off-pump)
Bypass surgery on the beating heart without the heart-lung machine. Eliminates the inflammatory response from bypass, significantly reducing stroke, kidney injury, and cognitive effects. Preferred for elderly patients and those with kidney or vascular disease.
Recommended for elderlyMICS CABG — Small Incision
Bypass surgery through a 2–3 inch right chest incision, without sternotomy. Sternum never cut. Hospital stay 3–5 days, full recovery 3–4 weeks. Can be combined with valve surgery in one MICS procedure — an India first at KGH.
Faster recoveryRobotic CABG — Keyhole Bypass
Bypass surgery through 3–4 incisions under 1 cm using the Da Vinci robotic system. Most precise approach. Hospital stay 2–3 days, full recovery 1–2 weeks. India first: 6 grafts robotically — the most complex robotic bypass performed in India.
India FirstOPCAB — Why Beating Heart
Bypass Surgery Matters
In conventional CABG, the heart is stopped and the heart-lung machine takes over circulation while the surgeon attaches the bypass grafts. The machine works well but introduces an inflammatory response from the blood interacting with the bypass circuit — which contributes to post-operative complications including stroke, kidney injury, and cognitive changes.
OPCAB (Off-Pump Coronary Artery Bypass) avoids this entirely. The surgeon operates on the beating, pumping heart, using specialised stabilisers that hold a small area of the heart still while the graft is being attached. The rest of the heart continues beating and pumping blood throughout.
This is technically more demanding — which is why not all centres offer it. KG Hospital’s surgical team performs both on-pump CABG and OPCAB, selecting the approach based on each patient’s specific risk factors.
peripheral vascular disease
Bypass Graft Sources —
Where the New Vessels Come From
The bypass graft is a healthy blood vessel taken from another part of your body and used to create the new coronary artery pathway. Your surgeon selects the best graft source based on which arteries are blocked and the planned approach.
India First: Robotic CABG
with 6 Grafts
The most complex robotic bypass surgery ever performed in India — six separate coronary arteries bypassed in a single robotic operation at KG Hospital.
Standard robotic CABG procedures typically involve 1–3 grafts. The conventional thinking was that robotic bypass beyond 3 grafts was impractical — too technically demanding, too long on bypass, too much positional adjustment required in the robotic ports.
KG Hospital’s cardiac surgery team performed 6 grafts robotically in a single operation — bypassing all six diseased coronary arteries through tiny keyhole incisions. This required pre-operative planning with 3D cardiac reconstruction, customised port positioning, and surgical precision that takes years of robotic cardiac experience to develop.
No other hospital in India had performed robotic CABG with 6 grafts before KG Hospital. This remains a national first.
Full Robotic Cardiac Surgery page →Who Needs Bypass Surgery —
and Which Approach Is Right?
CABG is recommended when coronary disease is too severe or complex for angioplasty alone. The approach — conventional, OPCAB, MICS, or robotic — is chosen based on your anatomy, comorbidities, and recovery priorities.
Bypass Surgery Recovery —
All Four Approaches Compared
Recovery timelines vary significantly by approach. Your surgeon will set realistic expectations before surgery based on which technique is used.
| Recovery | Robotic CABG | MICS CABG | OPCAB | Open CABG |
|---|---|---|---|---|
| Hospital stay | 2–3 days | 3–5 days | 5–7 days | 7–10 days |
| ICU stay | 12–24 hrs | 12–24 hrs | 1–2 days | 1–2 days |
| Full recovery | 1–2 weeks | 3–4 weeks | 4–6 weeks | 6–8 weeks |
| Return to work | 1–2 weeks | 3–4 weeks | 4–6 weeks | 6–8 weeks |
| Sternum cut | No | No | Yes | Yes |
Recovery times are approximate and vary based on age, comorbidities, and number of grafts. Your surgeon will advise based on your individual assessment.
