A heart pump is a mechanical device surgically implanted in the chest to help a failing heart move blood through the body. The most common type is a left ventricular assist device, or LVAD, which takes over much of the work from the heart’s main pumping chamber. Heart pumps don’t replace the heart entirely. Instead, they work alongside it, picking up the slack when the heart can no longer push enough blood on its own.
How a Heart Pump Works
Your heart’s left ventricle is responsible for sending oxygen-rich blood out to the rest of your body through the aorta, the largest artery. In advanced heart failure, this chamber becomes too weak to do that job effectively. An LVAD is a small mechanical pump placed at the bottom of the heart, inside the chest. It draws blood directly from the left ventricle and pushes it through a tube into the aorta, essentially doing the heavy lifting that the weakened muscle can no longer handle.
Modern heart pumps use a spinning rotor suspended by magnets, which means no parts physically touch or wear against each other. This design makes them more durable and less prone to blood clots forming inside the device. Unlike a natural heartbeat, these pumps create a continuous flow of blood rather than a pulse. Some LVAD patients have little or no detectable pulse, even though blood is circulating normally.
Types of Heart Pumps
Ventricular assist devices come in three configurations. An LVAD supports the left ventricle, an RVAD supports the right ventricle, and a BiVAD supports both. The vast majority of patients receive an LVAD, and it’s the only type that allows patients to leave the hospital and live at home. RVADs and BiVADs are typically used in more critical, hospital-based situations.
When both ventricles fail completely and an assist device isn’t enough, a total artificial heart is another option. This device replaces the heart entirely rather than assisting it. It’s reserved for the most severe cases where the heart’s own tissue can no longer contribute to pumping at all.
Who Qualifies for a Heart Pump
Heart pumps are reserved for people with advanced heart failure, specifically those whose symptoms severely limit daily activity despite being on the best available medications. According to guidelines from the American Heart Association and American College of Cardiology, candidates typically have some combination of frequent hospitalizations for heart failure, dependence on IV medications to keep the heart pumping, worsening kidney or liver function from poor blood flow, and an inability to tolerate the drugs that normally manage heart failure.
In clinical terms, these are patients at the most severe stage of the disease, often classified as NYHA class IV, meaning even minimal physical activity causes breathlessness or fatigue. A heart pump becomes a realistic option when medications, lifestyle changes, and other interventions have been exhausted.
Bridge to Transplant vs. Destination Therapy
Heart pumps serve two broad purposes depending on the patient’s situation. For people on the waiting list for a heart transplant, the pump acts as a bridge, keeping them alive and functional until a donor organ becomes available. Given the shortage of donor hearts, some patients wait months or years, and some never receive a suitable match.
For people who aren’t eligible for transplant, whether because of age, other health conditions, or personal choice, the pump becomes a permanent solution called destination therapy. Improvements in device durability have made long-term use increasingly viable. The line between these two categories has blurred in recent years, and many clinicians now take a more individualized approach rather than drawing a hard distinction at the outset.
What Living With a Heart Pump Looks Like
The internal pump is only one piece of the system. A cable called a driveline exits the body through a small opening in the abdomen and connects to an external controller, roughly the size of a small smartphone. This controller powers the pump and monitors how it’s functioning. If the driveline ever disconnects from the controller, the pump stops working, so maintaining that connection is critical at all times.
For daily life, patients carry a pair of batteries that power the device for roughly 10 to 17 hours on a full charge. At night, most people plug into a wall-powered unit while they sleep. A battery charging dock keeps spare batteries ready. You need to plan around access to electricity and always have charged batteries available, but within those constraints, many patients return to work, travel, and resume normal activities.
The driveline exit site requires careful daily cleaning to prevent infection, and patients can’t submerge the equipment in water, which rules out swimming and traditional baths. Showers require waterproof coverings for the external components.
Surgery and Recovery
LVAD implantation is open-heart surgery that takes several hours, though the exact duration varies significantly from patient to patient. Afterward, you’ll spend about five to seven days in the intensive care unit. Most patients then move to a regular hospital room for another one to two weeks. During this time, the medical team monitors how the device is performing, manages pain, and begins training you on how to care for the equipment at home.
The transition home involves learning to manage the controller, swap batteries, clean the driveline site, and recognize warning alarms. Most LVAD programs require a dedicated caregiver, at least in the early months, someone who also learns the system and can help in an emergency.
Risks and Complications
Bleeding is the most frequent complication, affecting 30% to 60% of patients both early after surgery and in the longer term. The continuous-flow design of modern pumps changes how blood clots and how blood vessels behave, which contributes to this risk. Gastrointestinal bleeding is particularly common.
Infection at the driveline exit site is another persistent concern because the cable creates a permanent opening in the skin. Stroke, both from blood clots and from bleeding in the brain, is a serious but less common risk. Blood clots can also form inside the pump itself, a problem called pump thrombosis. Newer devices have significantly reduced this risk. In clinical trials, the latest generation pump had a thrombosis rate of about 1.4% at two years, compared to over 6% with earlier models.
Survival Rates With Modern Devices
Outcomes have improved substantially with current technology. Data from the 2025 Intermacs annual report, the largest registry tracking these devices, shows one-year survival of about 86% and five-year survival of roughly 60% with the latest fully magnetically levitated pumps. Even among patients 65 and older, one-year survival is around 81%, with five-year survival exceeding 50%.
These numbers are notable because the patients receiving these devices are, by definition, in the most advanced stage of heart failure. Without intervention, their prognosis would be significantly worse. For older adults in particular, LVAD outcomes have become competitive enough with heart transplant results that the choice between the two increasingly comes down to individual circumstances and patient preference rather than a clear-cut survival advantage for one approach over the other.