# Off-Pump Coronary Artery Bypass (OPCAB)

> Citation bundle for Off-Pump Coronary Artery Bypass (OPCAB) on The Treatment Registry.
> URL: https://thetreatmentregistry.com/procedures/cabg-off-pump
> Bundle URL: https://thetreatmentregistry.com/api/citations/procedures/cabg-off-pump

- Category: cardiology
- Average recovery: 56 days
- Typical sessions: 1
- Price range (USD international): $22,000–$70,000

## Description

Off-pump coronary artery bypass (OPCAB) is a CABG technique performed on a beating heart without cardiopulmonary bypass. The surgeon uses tissue stabilisers to immobilise the small area of the coronary artery being grafted while the rest of the heart continues to beat. OPCAB avoids the systemic inflammatory response and other physiological consequences of cardiopulmonary bypass, but is technically more demanding than on-pump CABG and may produce slightly fewer complete revascularisations in some hands. ACC/AHA guidelines recommend OPCAB as a reasonable alternative to on-pump CABG in selected patients, particularly those with calcified ascending aortas where aortic cannulation is high-risk.

## Overview

Off-pump CABG was popularised in the 1990s and 2000s as a way to avoid the inflammatory and neurological consequences of cardiopulmonary bypass. The technique requires advanced stabilisation equipment, intracoronary shunts to maintain distal coronary flow during grafting, and considerable surgeon experience. Large randomised trials (ROOBY, CORONARY) have shown comparable mortality and major adverse cardiac event rates compared to on-pump CABG when performed by experienced operators, with some short-term advantages (stroke, transfusion) and the trade-off of slightly lower graft patency in some series.

## Peer-reviewed outcome rates

- **Complication rate:** 8.00% (range 5.00–13.00%) — from 1 cited source
- **Revision rate:** 5.00% (range 3.00–10.00%) — from 2 cited sources
- **Mortality rate:** 1.50% (range 0.50–3.00%) — from 2 cited sources

## Common risks

- Incomplete revascularisation
- Conversion to on-pump CABG
- Atrial fibrillation
- Stroke
- Sternal wound infection
- Atelectasis

## FAQs

### Is off-pump CABG safer than on-pump?

In experienced hands, mortality is comparable. OPCAB has short-term advantages (lower transfusion, possibly lower stroke rate, faster extubation) and the trade-off of slightly lower graft patency in some series and the surgical demand. ACC/AHA guidelines recommend OPCAB as reasonable in selected patients (Class IIa).

### When is off-pump CABG specifically recommended?

Patients with severely calcified ascending aortas (where aortic cannulation for on-pump bypass is high-risk) are the strongest candidates. Patients with significant comorbidity (renal dysfunction, advanced age, severe lung disease) may also benefit from avoiding cardiopulmonary bypass.

### How experienced does my surgeon need to be?

OPCAB has a meaningful learning curve. Surgeons with high OPCAB volumes (>50 cases per year) achieve outcomes comparable to on-pump CABG. Low-volume operators may have worse outcomes — both for completion of revascularisation and for major adverse events.

### What if the surgeon needs to convert to on-pump intra-operatively?

Conversion to on-pump CABG happens in 5-15% of OPCAB cases depending on patient anatomy and surgeon experience. Pre-operative consent should always cover the possibility of conversion. Outcomes after conversion are similar to planned on-pump CABG.

### Can I have OPCAB if I have multiple-vessel disease?

Yes — modern OPCAB technique allows multi-vessel revascularisation in most patients. The decision is based on coronary anatomy, target vessel quality, and surgeon experience. Some patterns (deep posterior targets, marginal target vessels) are technically more demanding off-pump.

### How long is the in-hospital stay?

Total length of stay is typically 5-7 days, similar to on-pump CABG. Extubation may be faster (4-6 hours vs 8-12 hours on-pump) and ICU stay slightly shorter, but step-down and ward time are comparable.

### Can off-pump CABG be combined with valve surgery?

Combining off-pump CABG with valve replacement is technically possible but reduces the off-pump advantage substantially, because valve surgery typically requires cardiopulmonary bypass anyway. Most surgeons performing combined coronary-valve operations use on-pump CABG to maintain a consistent operative environment.

### Is recovery shorter after off-pump CABG?

Extubation typically happens earlier (4-6 hours vs 8-12 hours on-pump) and ICU stay is slightly shorter, but total hospital length-of-stay is broadly similar — 5-7 days for most patients. The longer-term recovery trajectory (return to sedentary work, cardiac rehabilitation milestones) is comparable between on-pump and off-pump CABG.

## Sources

- [STS Adult Cardiac Surgery Database](https://www.sts.org/registries/sts-national-database/adult-cardiac-surgery-database) — Society of Thoracic Surgeons (accessed 2026-05-09)
- [2021 ACC/AHA/SCAI Guideline for Coronary Artery Revascularization](https://www.ahajournals.org/doi/10.1161/CIR.0000000000001038) — American College of Cardiology / American Heart Association (accessed 2026-05-09)