Heart Bypass Surgery (CABG): Preparation, Procedure & Recovery Guide

1. Preoperative Evaluation

Before coronary artery bypass grafting (CABG), your surgical team conducts a comprehensive assessment to determine your suitability for surgery and plan the procedure. This typically includes:

• Detailed physical examination and medical history
• Blood tests (complete blood count, coagulation profile, kidney/liver function)
• Cardiac imaging: ECG, echocardiogram, and coronary angiogram to map blockages
• Stress testing to evaluate functional capacity
• Pulmonary function tests to assess lung health
• Carotid ultrasound if stroke risk factors are present

2. Preparing for Surgery

Once cleared for surgery, you'll receive specific preoperative instructions:

• Fast for at least 8 hours before surgery (no food or drink)
• Stop certain medications as directed—particularly blood thinners (warfarin, DOACs), certain diabetes medications, and supplements that increase bleeding risk
• Shower with antimicrobial soap (typically chlorhexidine) the night before and morning of surgery
• Surgical site preparation—chest and leg/arm hair will be clipped by the surgical team
• Preoperative antibiotics to reduce infection risk

3. The Surgical Procedure

CABG is performed under general anesthesia and typically takes 3–6 hours depending on the number of bypasses needed:

1. Incision and exposure: The surgeon makes a median sternotomy (vertical incision through the breastbone) to access the heart.
2. Harvesting conduits: Healthy blood vessels—typically the internal mammary artery (from the chest wall), saphenous vein (from the leg), and/or radial artery (from the arm)—are harvested for grafts.
3. Cardiopulmonary bypass: The heart is stopped with cardioplegic solution, and a heart-lung machine takes over circulation and oxygenation. (Note: "Off-pump" or beating-heart CABG is an alternative for selected patients.)
4. Grafting: The surgeon attaches the harvested vessels to bypass the blocked coronary arteries, creating new pathways for blood flow.
5. Restarting the heart: The heart is rewarmed and restarted; the heart-lung machine is weaned off.
6. Closure: The breastbone is secured with wires, and the chest incision is closed in layers.

4. Recovery After Surgery

Postoperatively, you'll spend 1–2 days in the ICU for close monitoring, then transfer to a step-down unit for several more days. Care includes:

• Pain management with multimodal analgesia
• Antibiotics to prevent surgical site infection
• Anticoagulation/antiplatelet therapy to prevent graft thrombosis
• Oxygen therapy and pulmonary hygiene (incentive spirometry)
• Early mobilization with physical therapy—sitting up, walking, breathing exercises
• Monitoring for complications: bleeding, arrhythmias (especially atrial fibrillation), kidney dysfunction, stroke

Typical hospital stay is 5–7 days for uncomplicated cases.

5. Long-Term Outlook

Most patients experience significant symptom relief and improved quality of life. However, bypass surgery does not cure coronary artery disease—the underlying atherosclerosis process continues. Lifelong lifestyle changes are crucial for graft longevity and preventing disease progression:

• Heart-healthy diet (Mediterranean/DASH patterns)
• Regular exercise (cardiac rehabilitation is strongly recommended)
• Complete smoking cessation
• Strict blood pressure, cholesterol, and diabetes management
• Adherence to prescribed medications (antiplatelets, statins, beta-blockers, ACE/ARB)

6. Risks of Bypass Surgery

As with any major surgery, CABG carries risks including bleeding, infection, stroke, heart attack, kidney failure, atrial fibrillation, and death. Your individual risk depends on age, overall health, urgency of surgery, and disease severity. Discuss risks and benefits thoroughly with your surgical team.