Recovering at Home After Heart Bypass Surgery: A Complete Physiotherapy Guide

Heart bypass surgery (also called coronary artery bypass graft surgery or CABG) is one of the most common and effective heart operations performed worldwide.

If you or a loved one has had bypass surgery, returning home can feel like a big step. While the surgery restores blood flow to the heart, the body still needs time to heal.

The weeks following discharge are focused on:

• Supporting lung recovery

• Rebuilding strength and endurance

• Protecting the healing breastbone

• Gradually returning to everyday activities

Physiotherapy, breathing exercises, and gentle movement play a crucial role in recovery.

This guide explains what bypass surgery involves and provides practical advice to help you recover safely at home.

What Is Heart Bypass Surgery?

Heart bypass surgery is performed when the coronary arteries that supply blood to the heart muscle become narrowed or blocked.

These blockages are usually caused by coronary artery disease, where fatty deposits (plaque) build up inside the arteries.

When the arteries narrow, less oxygen-rich blood reaches the heart muscle. This can lead to:

• Chest pain (angina)

• Shortness of breath

• Fatigue

• Increased risk of heart attack

Bypass surgery restores blood flow by creating a new pathway for blood to travel around the blockage.

Signs Someone May Need Bypass Surgery

Not everyone with coronary artery disease needs surgery. Many people are managed with medication or stents.

However, surgery may be recommended if someone has:

• Severe coronary artery blockages

• Multiple blocked arteries

• Ongoing chest pain despite treatment

• A heart attack caused by blocked arteries

• Reduced blood flow to large areas of the heart

Your cardiology team will determine the best treatment based on scans, angiograms and overall heart function.

What Happens During Bypass Surgery?

During bypass surgery, surgeons take a healthy blood vessel from another part of the body and use it to create a new route around the blocked artery.

These graft vessels are commonly taken from:

• The leg (saphenous vein)

• The chest wall (internal mammary artery)

• Occasionally the arm (radial artery)

This new vessel is connected above and below the blockage, allowing blood to flow around the narrowed section and reach the heart muscle again. This is why the procedure is called a “bypass.” Many patients receive multiple bypass grafts depending on how many arteries are affected.

How Surgeons Access the Heart

To reach the heart, surgeons make an incision down the centre of the chest and gently divide the breastbone (sternum). This allows access to the heart and major blood vessels. At the end of the operation, the breastbone is carefully brought back together and secured with surgical wires while it heals over the following weeks. This is why protecting the sternum during recovery is so important.

The Heart-Lung Bypass Machine

During many bypass operations, the heart is temporarily stopped so surgeons can work on a still surface.

A machine called the cardiopulmonary bypass machine takes over the work of the heart and lungs during this time.

This machine:

• Pumps blood around the body

• Adds oxygen to the blood

• Removes carbon dioxide

Once the grafts are completed, the heart is restarted and the machine is gradually disconnected.

Some bypass surgeries are performed “off pump”, meaning the heart continues beating during the procedure. Your surgical team will decide the safest approach for you.

Why Bypass Surgery Helps

By restoring blood flow to the heart muscle, bypass surgery can:

• Relieve chest pain

• Improve energy levels

• Improve heart function

• Reduce the risk of heart attack

• Improve quality of life

Many people notice a significant improvement in symptoms once they have recovered.

Why Rehabilitation Is Important After Surgery

Although the surgery improves blood flow, the body still needs time to recover.

After surgery:

• Lung function can be reduced

• Muscles weaken from time spent in bed

• The breastbone needs time to heal

• Energy levels may be low

Rehabilitation helps the body gradually rebuild strength and endurance.

Breathing Exercises to Protect Your Lungs

Breathing exercises are one of the most important parts of early recovery. After surgery, breathing often becomes shallow due to pain or fatigue. This can increase the risk of chest infections. Breathing exercises help:

• Re-expand the lungs

• Improve oxygen levels

• Prevent infection

• Clear mucus

Thoracic Breathing Exercise

Try to practise these exercises regularly during the day.

1. Sit upright in a chair

2. Relax your shoulders

3. Breathe in slowly through your nose

4. Allow the ribs and chest to expand

5. Hold the breath for 2–3 seconds

6. Breathe out slowly through your mouth

Repeat 5–10 breaths every hour while awake.

Why Sitting in a Chair Is Better Than Staying in Bed

Sitting upright is much better for breathing than lying in bed.

In a chair:

• The diaphragm moves more freely

• Lung expansion improves

• Breathing becomes deeper

• Secretions clear more easily

In bed:

• Lung expansion is reduced

• Breathing becomes shallow

• Secretions may build up

Try to spend regular periods sitting out of bed during the day.

Clearing Chest Secretions

If you develop phlegm after surgery, clearing it is important.

Supported Cough

1. Sit upright

2. Hug a pillow against your chest or cross your arms across your chest

3. Take a deep breath in through your nose

4. Hold briefly

5. Cough firmly while supporting your chest

Supporting the chest reduces discomfort and protects the healing breastbone.

Protecting Your Breastbone (Sternal Precautions)

During bypass surgery the breastbone is divided and then wired back together. It normally takes around 8–10 weeks to heal. Your hospital team will give specific precautions. Always follow the advice from your surgical team.

Common precautions include avoiding:

• Heavy lifting

• Pushing or pulling strongly

• Straining through the arms

• Lifting objects away from the body

When lifting small objects, a helpful rule is to:

Keep items close to your body and avoid twisting.

This reduces strain through the chest.

Some people are advised not to push up through their arms when standing. Because of this, chair height becomes very important.

Choosing the Right Chair After Surgery

A chair that is too low makes standing difficult and encourages pushing through the arms.

Helpful options include:

• A firm chair with good armrests

• Chair raisers

• Extra cushions

• A riser-recliner chair

These allow you to stand using your legs rather than your arms, protecting the sternum.

Practical Home Tips

Simple equipment can make recovery easier.

Helpful items include:

• Grabbers or reachers for picking things up

• Raised seating

• Shower chairs if balance is reduced, or fatigue is an issue

It is also helpful to have support at home.

Family members or carers can help with:

• Cooking

• Shopping

• Housework

• Lifting tasks

Reducing physical strain helps your body focus on healing.

Low Blood Pressure After Surgery

Some people experience lower blood pressure after heart surgery.

This may be due to:

• Heart medications

• Reduced fluid intake

• Time spent in hospital

• Circulatory adjustments after surgery

Low blood pressure may cause dizziness when standing. Fortunately, there are simple strategies to manage this.

Preventing Dizziness When Standing

This is called postural hypotension. To reduce dizziness:

When waking up

Before standing:

• Perform ankle pumps for 30–60 seconds

• Sit on the edge of the bed

• Wait 1–2 minutes

When standing

• Stand beside the bed or chair

• Wait 10–20 seconds

• Ensure no dizziness before walking

If dizziness occurs, sit back down and wait.

Staying Hydrated

Hydration plays an important role in recovery.

Drinking enough fluids helps:

• Maintain blood pressure

• Improve circulation

• Thin chest secretions

• Improve energy levels

Unless your medical team has advised fluid restriction, aim to drink regularly throughout the day.

Nutrition and Recovery

After major surgery, appetite can be reduced.

However, your body needs energy to heal and rebuild strength.

If large meals feel difficult:

• Eat smaller meals more often

• Snack regularly

• Choose nutritious foods

Even small snacks provide important fuel for recovery.

Fatigue After Major Surgery

Fatigue is extremely common after bypass surgery.

This occurs because:

• The body is healing

• Sleep patterns may be disrupted

• Energy is used for tissue repair

• Fitness temporarily reduces

This tiredness may last several weeks. Pacing your activity is essential.

Walking: The Best Exercise for Recovery

Walking is one of the safest ways to rebuild strength.

It helps:

• Improve circulation

• Strengthen the heart and lungs

• Prevent blood clots

• Improve stamina

Start with short walks around the home and gradually increase distance.

You should feel slightly breathless but still able to talk comfortably.

Seated Exercises for Leg Strength

Perform these exercises 2–3 times per day.

Seated Marching

Lift one knee at a time.

10 repetitions per leg.

Knee Extension

Straighten the knee and pull the toes up.

Hold 5 seconds.

Repeat 10 times per leg.

Ankle Pumps

Move feet up and down repeatedly.

This helps circulation.

Heel Raises

Lift heels slightly while seated.

Repeat 10–15 times.

Monitoring Your Surgical Scars

Check your wounds regularly.

You may have:

• A chest incision

• Leg or arm incisions where graft vessels were taken

Signs of infection include:

• Increasing redness

• Swelling

• Warm skin

• Discharge

• Increasing pain

• Fever

Contact your GP or surgical team if these occur.

Signs of Sepsis – A Medical Emergency

Sepsis is a serious reaction to infection.

Seek urgent help if someone develops:

• Very high or very low temperature

• Confusion or extreme drowsiness

• Severe breathlessness

• Fast heart rate

• Pale or mottled skin

• Little or no urine

Call 999 immediately if sepsis is suspected. Tell the operator you suspect sepsis, this is an emergency, do not wait.

How Physiotherapy at Home Can Help

Recovering from heart surgery can feel overwhelming.

A physiotherapist can help you:

• Improve breathing and lung function

• Progress your walking safely

• Rebuild strength and endurance

• Manage fatigue and pacing

• Regain confidence in movement

At Physio@Home, we provide specialist physiotherapy in the comfort of your own home, supporting you throughout your recovery.

If you would like support with your recovery after heart surgery, visit:

www.physioathome.uk to learn more about our home physiotherapy services.

About Physio@Home

If you're finding recovery from injury, surgery, illness, or a fall more challenging than expected, professional support in the comfort of your own home can make all the difference. At Physio At Home, we specialise in expert home visit physiotherapy across Mid Cornwall — including Truro, Falmouth, Penryn, Helston, Perranporth, Feock, St Agnes, and surrounding areas. Our HCPC-registered and experienced physiotherapists provide personalised assessments, tailored rehabilitation plans, mobility and balance training, and practical advice to help you regain strength, confidence, and independence without the hassle of travelling to a clinic. Ready to move better and feel better right where you live? Visit https://www.physioathome.uk/