Preparing for Heart Surgery: A Complete Patient Guide.

The weeks before cardiac surgery involve a comprehensive evaluation designed to optimize your condition, identify hidden risks, and plan every detail of the operation. This process typically includes:

Cardiac workup:

• Echocardiography (TTE/TEE): Defines valve pathology, ventricular function, and cardiac anatomy. Transesophageal echo (TEE) provides superior detail for mitral valve assessment and is standard for surgical planning.
• Coronary angiography (cardiac catheterization): Required before valve surgery to evaluate for concomitant coronary disease. Also defines coronary anatomy for CABG planning.
• CT angiography: Increasingly used for surgical planning — evaluates aortic calcification, peripheral vascular access (for minimally invasive or TAVR approaches), and 3D cardiac anatomy. Essential for TAVR vs SAVR decision-making.
• Cardiac MRI: Provides the most accurate assessment of ventricular function, myocardial viability, valve regurgitation quantification, and tissue characterization (fibrosis, infiltration).

Non-cardiac evaluation:

• Pulmonary function tests: Baseline lung function, especially important for patients with COPD or smoking history
• Carotid ultrasound: Screens for significant carotid stenosis that may need to be addressed before or during cardiac surgery to reduce stroke risk
• Dental evaluation: Active dental infections must be treated before valve surgery to prevent prosthetic valve endocarditis
• Blood work: CBC, BMP, liver function, coagulation panel, hemoglobin A1c, thyroid function, blood type and crossmatch

Your surgical risk is quantified using the STS score and EuroSCORE II. WhiteGloveMD provides comprehensive risk assessment as part of every evaluation.

Prehabilitation — structured exercise, nutrition optimization, and psychological preparation before surgery — is an emerging evidence-based strategy to improve cardiac surgical outcomes. Multiple studies have shown that patients who engage in prehabilitation have shorter ICU stays, fewer pulmonary complications, shorter hospital stays, and faster functional recovery.

Exercise prehabilitation:

• Begin 2-4 weeks before surgery (or as early as possible after the decision to operate)
• Moderate-intensity aerobic exercise: 20-30 minutes of walking, stationary cycling, or swimming, 5 days per week
• Inspiratory muscle training: Incentive spirometry or threshold IMT device, 15-20 minutes twice daily — reduces post-operative pulmonary complications by 50% in some studies
• Supervised cardiac rehabilitation programs offer structured prehabilitation with monitoring

Nutritional optimization:

• Protein intake: 1.2-1.5 g/kg/day to support wound healing and maintain muscle mass
• Correct iron-deficiency anemia before surgery (IV iron if needed — transfusion should be avoided preoperatively when possible)
• Albumin above 3.5 g/dL predicts better healing; nutritional supplements if below this threshold
• Glycemic control: Target HbA1c below 8.5% for diabetic patients; poorly controlled diabetes increases sternal wound infection risk 3-fold

Smoking cessation: Stopping smoking at least 4 weeks before surgery reduces pulmonary complications by 30-50%. Even 48 hours of cessation improves carboxyhemoglobin levels and oxygen delivery. Nicotine replacement therapy is safe preoperatively and should be offered to all smoking patients.

Psychological preparation: Preoperative anxiety and depression predict worse post-operative outcomes, including longer ICU stays, more pain, and slower functional recovery. Psychological counseling, mindfulness practices, and connecting with patients who have undergone similar procedures can meaningfully reduce anxiety.

Careful medication management before cardiac surgery is essential for safety. Your surgical team will provide specific instructions, but general principles include:

Medications to STOP before surgery:

• Anticoagulants: Warfarin (stop 5 days before, bridge with heparin if high thrombotic risk), DOACs — apixaban/rivaroxaban (stop 48-72 hours before), dabigatran (stop 48-96 hours depending on renal function)
• Antiplatelet agents: Clopidogrel (stop 5 days before), ticagrelor (stop 3-5 days before), prasugrel (stop 7 days before). Aspirin is typically continued unless the surgeon specifically requests discontinuation.
• Metformin: Stop 48 hours before surgery (risk of lactic acidosis with contrast dye and perioperative hemodynamic changes)
• Herbal supplements and vitamins: Stop all 7-14 days before surgery. Fish oil, ginkgo, garlic, and vitamin E increase bleeding risk. St. John's wort interacts with anesthetic agents.
• NSAIDs: Stop ibuprofen, naproxen 5-7 days before surgery (platelet inhibition)

Medications to CONTINUE:

• Beta-blockers: Continue through surgery — abrupt discontinuation increases perioperative atrial fibrillation and hemodynamic instability
• Statins: Continue — perioperative statin use reduces atrial fibrillation, MI, and mortality
• ACE inhibitors/ARBs: Most centers hold on the morning of surgery due to intraoperative hypotension risk, but continue up to the day before
• Thyroid medications: Continue without interruption
• Antiseizure medications: Continue without interruption

Insulin management requires specific adjustment. Long-acting insulin is typically reduced by 50% the evening before surgery. Sliding-scale insulin manages glucose perioperatively. Target glucose 140-180 mg/dL during and after surgery — the Portland Protocol and NICE-SUGAR trial guide perioperative glycemic management.

Understanding the sequence of events on the day of cardiac surgery helps reduce anxiety and allows patients and families to prepare:

Morning preparations:

• NPO (nothing by mouth) after midnight — no food or drink except medications with a sip of water
• Chlorhexidine shower the night before and morning of surgery
• Arrive 2-3 hours before scheduled surgery time
• Check-in, change into hospital gown, IV placement, preoperative blood draw
• Meet with your anesthesiologist — review medical history, allergies, airway assessment
• Meet with your surgeon — confirm the planned procedure, mark the operative site if applicable, sign consent

In the operating room:

• The OR team includes: cardiac surgeon (and assistant/fellow), cardiac anesthesiologist, perfusionist (operates heart-lung machine), scrub nurse, circulating nurse, and often additional specialists
• Monitoring lines are placed: arterial line (real-time blood pressure), central venous catheter, pulmonary artery catheter (Swan-Ganz), TEE probe, foley catheter, temperature monitors
• General anesthesia is induced — the patient is asleep and on a ventilator
• For procedures requiring cardiopulmonary bypass: the surgeon connects the heart-lung machine, cools the body, stops the heart with cardioplegia solution, performs the repair, then rewarms the body and restarts the heart
• Typical operating times: isolated CABG 3-4 hours, isolated valve 2-3 hours, combined CABG + valve 4-5 hours, aortic root replacement 4-6 hours

For families: The surgical waiting area has a liaison who provides periodic updates. The surgeon will speak with the family after the procedure is complete, before the patient is transferred to the ICU. The waiting period is stressful — bringing a book, charger, and snacks is practical advice often overlooked.

After cardiac surgery, patients are transferred to the cardiac surgical ICU (CSICU). The first 24-72 hours are the most intensive monitoring period:

Immediate post-operative state:

• The patient arrives intubated (on a ventilator) and sedated. Ventilator weaning and extubation (removal of the breathing tube) typically occurs within 4-8 hours for uncomplicated cases. Enhanced Recovery After Surgery (ERAS) protocols may enable extubation in the operating room.
• Chest tubes drain fluid and air from around the heart and lungs. These are removed when drainage drops below 100-200 mL per shift (typically postoperative day 1-3).
• Temporary pacing wires are placed on the heart during surgery. These allow external pacing if the heart rhythm is slow or unstable. They are removed before discharge (typically postoperative day 3-5).
• Multiple IV medications manage blood pressure, heart rate, pain, and sedation. These are gradually transitioned to oral medications.

Common ICU experiences patients should expect:

• Pain: Managed with IV narcotics initially, transitioning to oral pain medications. The sternotomy incision causes chest and shoulder pain. Pain should be reported and managed proactively — uncontrolled pain impairs breathing and coughing, increasing pulmonary complications.
• Confusion and disorientation: ICU delirium affects 25-50% of cardiac surgery patients, particularly elderly patients. It is usually temporary (1-3 days) and managed with reorientation, sleep-wake cycle preservation, and minimizing sedation.
• Atrial fibrillation: New-onset AF occurs in 25-40% of patients after cardiac surgery, typically peaking on postoperative day 2-3. It is usually managed with rate control (amiodarone or beta-blockers) and resolves within 6 weeks in most patients.
• Fever: Low-grade fever is normal in the first 48 hours after surgery due to systemic inflammatory response. Persistent or high fever warrants evaluation for infection.

After the ICU, patients are transferred to a step-down unit or cardiac surgery floor for continued recovery. The typical hospital stay after cardiac surgery is 5-8 days for sternotomy procedures and 3-5 days for minimally invasive approaches. Key milestones during this phase:

Postoperative days 1-2:

• Mobilization begins — sitting up in a chair, walking in the hallway with assistance. Early mobilization is one of the most important predictors of good recovery.
• Diet advances from clear liquids to regular food as tolerated
• Incentive spirometry — 10 breaths every 1-2 hours while awake to prevent atelectasis (lung collapse) and pneumonia
• Chest tube and IV line removal as criteria are met

Postoperative days 3-5:

• Increasing ambulation — goal of walking 200-400 feet three times daily
• Transition from IV to oral medications
• Bowel function return (constipation is common from narcotics — stool softeners are standard)
• Cardiac rehabilitation team evaluation and discharge exercise plan
• Social work and case management arrange home care, rehabilitation facility, or visiting nurse services

Discharge criteria (typical):

• Stable heart rhythm (or controlled AF with anticoagulation plan)
• Adequate oral intake and bowel function
• Ambulatory without significant assistance
• Incisions clean, dry, and healing appropriately
• Pain controlled with oral medications
• Chest X-ray showing no significant pleural effusion or pneumothorax
• Lab values (electrolytes, renal function, hemoglobin) stable and acceptable
• INR therapeutic if on warfarin
• Discharge medications, follow-up appointments, and activity restrictions clearly communicated

Home recovery after cardiac surgery requires patience, adherence to activity restrictions, and awareness of warning signs. This phase is where the investment in prehabilitation pays dividends.

Activity guidelines after sternotomy:

• Sternal precautions (first 6-8 weeks): No lifting more than 5-10 pounds. No pushing or pulling with arms. No driving (typically 4-6 weeks, or until off narcotic pain medication). No reaching behind the back. Use a sternal support pillow when coughing.
• Walking: The best exercise during early recovery. Start with 5-10 minutes, 3-4 times daily. Gradually increase to 30-45 minutes daily by week 4-6.
• Stairs: Allowed immediately, but take them slowly. Lead with the stronger leg going up, weaker leg going down.
• Showering: Allowed after incision check at first post-operative visit (typically 1-2 weeks). No soaking (baths, pools, hot tubs) for 6-8 weeks.
• Return to work: Desk jobs: 4-6 weeks. Physical labor: 8-12 weeks (or longer depending on the job). Discuss with your surgeon.
• Sexual activity: Generally safe to resume when you can climb two flights of stairs without shortness of breath (typically 4-6 weeks).

Emotional recovery: Depression affects 20-30% of cardiac surgery patients. Emotional fluctuations, tearfulness, irritability, and sleep disturbances are common and usually resolve within 2-3 months. Cardiac rehabilitation programs provide psychological support as well as physical recovery. If symptoms are severe or persistent, discuss with your physician — antidepressant therapy may be beneficial.

Warning signs requiring immediate medical attention:

• Fever above 101.5 degrees Fahrenheit (38.6 degrees Celsius)
• New or increasing redness, swelling, drainage, or separation of the incision
• Sudden severe chest pain or shortness of breath
• Rapid heart rate or new palpitations
• Sudden weakness, numbness, vision changes, or speech difficulty (stroke symptoms)
• Calf swelling, redness, or pain (deep vein thrombosis)

Cardiac rehabilitation (cardiac rehab) is a medically supervised program of exercise, education, and risk factor modification that is one of the most underutilized, evidence-based interventions in cardiology. The 2021 ACC/AHA Guidelines give cardiac rehabilitation a Class I recommendation after cardiac surgery, yet only 20-30% of eligible patients participate.

Cardiac rehab consists of three phases:

• Phase I (inpatient): Begins in the hospital with mobilization, breathing exercises, and education. Initiated by the rehab team before discharge.
• Phase II (outpatient, supervised): The core program — typically 36 sessions over 12 weeks. ECG-monitored exercise sessions 3 times per week, progressing from low to moderate intensity. Includes education on nutrition, medications, risk factors, stress management, and emotional recovery. This is where the measurable benefits occur.
• Phase III (maintenance): Self-directed or community-based exercise after completing Phase II. Ongoing lifestyle modification and risk factor management.

Evidence for cardiac rehabilitation after surgery:

• 25-30% reduction in cardiovascular mortality
• 18-25% reduction in hospital readmissions
• Improved exercise capacity (peak VO2 increase of 15-25%)
• Improved quality of life scores
• Better medication adherence and risk factor control
• Reduced depression and anxiety

Home-based cardiac rehab programs (telehealth-monitored exercise with periodic virtual visits) have emerged as an alternative for patients unable to attend facility-based programs. The HYBRID trial and other studies show comparable outcomes for home-based vs center-based programs, expanding access for rural and mobility-limited patients.

WhiteGloveMD concierge cardiology subscribers receive personalized cardiac rehabilitation guidance and monitoring as part of their membership. View our concierge cardiology tiers.