Left Ventricular Assist Device (LVAD)

A Left Ventricular Assist Device (LVAD) is a surgically implanted mechanical pump that takes over part of the work of the heart's main pumping chamber — the left ventricle — when it is too weak to circulate enough blood on its own.

The device is placed inside the chest. A tube draws blood from the left ventricle and sends it into a pump, which then pushes the blood forward into the aorta (the body's largest artery), so it can travel to the rest of the body. A thin cable called a driveline passes through the skin and connects the pump to a controller and battery pack worn outside the body. The pump runs continuously, keeping blood moving even when the heart muscle itself is very weak.

An LVAD is used when the left ventricle can no longer pump enough blood to keep the body's organs working properly — a condition called advanced heart failure. Doctors use it in two main situations: as a 'bridge to transplant' (keeping the patient stable while waiting for a donor heart) or as 'destination therapy' (long-term support for patients who are not eligible for a heart transplant).

• Severe, end-stage heart failure that does not respond to maximum medical treatment
• Dilated cardiomyopathy (a condition where the heart muscle becomes enlarged and weakened)
• Ischemic cardiomyopathy (heart muscle damage caused by long-term reduced blood supply, usually from coronary artery disease)
• Acute cardiogenic shock (a sudden, life-threatening drop in the heart's pumping ability) when other measures have not been enough
• As a bridge to transplant — stabilising a patient on the heart transplant waiting list
• As destination therapy — long-term mechanical support when transplant is not possible

An LVAD is not suitable for everyone with heart failure. Doctors will carefully assess each patient because certain conditions make the risks too high or the device unlikely to help.

• Severe right heart failure, where the right side of the heart is also too weak to work with the LVAD
• Serious blood clotting disorders or conditions that make long-term anticoagulation (blood-thinning treatment) unsafe
• Active, uncontrolled infection anywhere in the body
• Severe kidney or liver disease that has not been caused by heart failure
• Conditions that severely limit life expectancy independent of heart failure
• Patients who are unable or unwilling to manage the external equipment and follow the required care routine

LVAD implantation is a major open-heart operation and carries significant risks; your heart team will weigh these carefully against the risk of not having the device.

• Bleeding — both during surgery and afterwards, particularly in the stomach or intestines, because blood-thinning medication must be taken for life
• Stroke (a blockage or bleed in the brain) — blood clots can form on or around the pump and travel to the brain
• Pump thrombosis (a blood clot forming inside the device itself), which can reduce how well the pump works
• Driveline infection — bacteria can enter the body along the cable that exits through the skin, and this is one of the most common long-term complications
• Right heart failure — the right side of the heart may struggle after the left side suddenly receives LVAD support
• Arrhythmia (an irregular heartbeat), including dangerous fast rhythms that may require treatment
• Device malfunction — the pump or its components may need adjustment or, rarely, replacement
• Aortic regurgitation (a leaky aortic valve, the valve between the main pumping chamber and the aorta) that can worsen over time with LVAD use
• Kidney or liver injury related to the surgery or to a period of low blood flow before or after implantation
• Risks common to any major surgery: reactions to general anaesthesia, wound infection, and blood clots in the legs

Before surgery, the team will carry out a thorough assessment to make sure the LVAD is the right choice and that the patient is as stable as possible going into the operation. Preparation usually takes place over several days and involves tests, medication adjustments, and practical training.

Patients are usually asked to fast — stop eating solid food and, after a certain point, stop drinking fluids — for a period of hours before surgery, following the anaesthesia team's exact instructions. Some regular medications, including blood thinners and certain heart medications, may be paused or adjusted; the medical team will give specific guidance. Smoking should be stopped as early as possible before the operation, as it slows healing. Alcohol should also be avoided in the lead-up to surgery.

The following tests are commonly carried out before LVAD implantation:

• Echocardiogram (an ultrasound scan of the heart, often called 'echo') to measure exactly how weak the left ventricle is and to check the right side of the heart and the heart valves
• Right heart catheterisation (a thin tube passed through a vein to measure pressures inside the heart and lungs) to assess whether the right heart can cope with LVAD support
• Coronary angiography (an X-ray test using dye in the heart arteries) if the cause of heart failure is suspected to be blocked arteries
• CT scan of the chest and abdomen to plan where the device will be placed and to check the aorta
• Blood tests including full blood count, kidney and liver function, clotting ability, and blood type and crossmatch for transfusion
• Lung function tests and chest X-ray
• Neurological (brain and nerve function) assessment to establish a baseline before starting blood thinners
• Dental review, as tooth and gum infections can become serious once an LVAD is in place
• Psychological and social assessment to confirm the patient and their support network can manage the device at home

The implantation procedure itself follows these general steps, though the exact approach varies between centres and patients:

• 1. The patient is given general anaesthesia so they are fully asleep throughout.
• 2. The surgical team opens the chest, usually through the breastbone (sternotomy), to reach the heart.
• 3. In most cases, the patient is connected to a cardiopulmonary bypass (heart-lung) machine, which temporarily takes over the work of the heart and lungs during surgery.
• 4. The pump is secured to the tip of the left ventricle and an outflow tube (graft) is attached to the aorta.
• 5. The driveline cable is tunnelled under the skin and brought out through a small exit site, usually on the upper abdomen.
• 6. The pump is started, blood flow through the device is checked, and connections are tested for leaks.
• 7. The bypass machine is gradually switched off as the LVAD takes over circulation.
• 8. The chest is closed and the patient is moved to the intensive care unit (ICU) for close monitoring.

Recovery after LVAD implantation is a long-term commitment. The first days are spent in the ICU, where the team monitors heart function, blood pressure, and the pump's performance closely. Once stable, the patient moves to a general cardiology or cardiac surgery ward. Before going home, both the patient and at least one family member or carer are trained intensively on how to operate the controller, change the batteries, clean the driveline exit site, and recognise warning signs that need urgent attention. This training period varies between hospitals but is not shortened until the team is confident the patient is safe at home.

• Blood thinners: anticoagulation (blood-thinning) medication must be taken every day for as long as the LVAD is in place; regular blood tests will be needed to check that the level of thinning is within the correct range
• Driveline care: the skin exit site of the driveline cable must be cleaned and dressed regularly, following the exact technique taught by the nursing team, to prevent infection
• Activity: most patients gradually return to light daily activities; strenuous exercise, contact sports, and submersion in water (baths, swimming) are usually restricted — your care team will advise on what is allowed
• Driving: driving is generally not permitted while living with an LVAD in many countries; local rules apply
• Electricity and magnets: the equipment is sensitive to certain electrical fields and strong magnets; patients receive guidance on safe distances from household appliances, airport security, and MRI machines
• Carrying equipment: the controller and batteries must be with the patient at all times; a backup set must always be available
• Follow-up appointments: regular outpatient visits to the LVAD clinic are essential for device checks, blood tests, heart imaging, and medication review — usually more frequent at first and then spaced out as the patient stabilises
• Warning signs: patients and carers are taught to act immediately if alarms sound on the controller, if the driveline site becomes red, swollen, or producing discharge, or if symptoms such as dizziness, breathlessness, or unusual tiredness appear
• Lifestyle: a heart-healthy diet, careful fluid and salt intake, and avoiding situations where the equipment could be damaged or disconnected are all part of daily life with an LVAD
• Psychological support: living with a mechanical pump is a significant adjustment; many centres offer counselling or support groups for patients and families