AVR stands for aortic valve replacement, a surgical procedure that replaces a damaged or diseased aortic valve with a new one. The aortic valve sits between your heart’s main pumping chamber and the aorta, your body’s largest artery. When that valve stops opening or closing properly, your heart has to work significantly harder to push blood out to the rest of your body. AVR corrects the problem by swapping in a functioning replacement valve.
Why the Aortic Valve Needs Replacing
The aortic valve normally has three thin flaps (called cusps) that open and close with each heartbeat to keep blood flowing in one direction. Two main problems can develop. In aortic stenosis, the valve thickens and narrows, creating a smaller opening that restricts blood flow out of the heart. In aortic regurgitation, the valve doesn’t close tightly, allowing blood to leak backward into the heart’s lower left chamber.
Some people are born with a valve that has only two cusps instead of three, a condition called bicuspid aortic valve. This structural difference makes the valve more prone to both stenosis and regurgitation over time. Other causes include age-related calcium buildup on the valve leaflets, infections, and rheumatic heart disease.
Mild cases of either condition often don’t require surgery. Medications can help the heart compensate, and regular monitoring tracks whether the valve is getting worse. Surgery becomes the recommendation when disease is severe or when symptoms like chest pain, fainting, shortness of breath, or fatigue start limiting daily life.
Open Surgery vs. Catheter-Based Replacement
There are two main approaches to replacing the aortic valve. Surgical aortic valve replacement (SAVR) is open-heart surgery: a surgeon makes an incision through the chest, stops the heart temporarily, removes the damaged valve, and sews in the new one. Transcatheter aortic valve replacement (TAVR) is minimally invasive. A thin tube is threaded through a blood vessel, typically in the groin, and a new valve is guided into place inside the old one without removing it.
TAVR was originally developed for patients considered too high-risk for open surgery, and it has proven comparable to SAVR in clinical outcomes for those patients. Current guidelines from the American College of Cardiology and the American Heart Association recommend TAVR over open surgery for patients older than 80 or those with a life expectancy under 10 years, as long as the catheter can be inserted through the leg artery without complications. For younger, lower-risk patients, SAVR remains the standard because the long-term durability data for TAVR valves is still being established.
TAVR recovery is significantly shorter, with most patients going home within a few days and returning to normal activity much sooner. Open surgery requires a longer hospital stay and weeks of gradual recovery, since the breastbone needs time to heal.
Mechanical vs. Biological Valves
When you undergo AVR, the replacement valve is either mechanical (made from durable synthetic materials) or bioprosthetic (made from animal tissue, usually cow or pig). The choice between them is one of the most consequential decisions in the process, because each comes with a distinct tradeoff.
Mechanical valves last 20 to 30 years and are extremely durable. The catch is that they increase the risk of blood clots forming on the valve surface, which means you’ll need to take a blood thinner (warfarin) every day for the rest of your life. That comes with its own risks, including bleeding complications, and requires regular blood tests to keep the dosage dialed in.
Bioprosthetic valves don’t require lifelong blood thinners, which makes daily life simpler. But they wear out faster, lasting roughly 10 to 15 years. Structural deterioration begins around 5 years after implantation. By 10 years, about 17% of patients show significant valve breakdown; by 15 years, that number climbs to roughly 37%. This means younger patients who choose a biological valve will likely need a second replacement later in life.
In general, mechanical valves tend to be recommended for younger patients who can tolerate decades of blood-thinner therapy, while bioprosthetic valves are more common in older patients who want to avoid anticoagulation and are less likely to outlive the valve.
The Ross Procedure for Younger Patients
For children, teenagers, and younger adults, a third option exists called the Ross procedure. Instead of using a mechanical or animal-tissue valve, the surgeon moves the patient’s own pulmonary valve (which sits between the heart and the lungs) into the aortic position. A donor valve then replaces the pulmonary valve, which operates under much lower pressure and is easier to substitute.
The advantage is striking: the Ross procedure is currently the only aortic valve operation that restores long-term survival rates equal to those of healthy people the same age. In children over age 1, 10-year survival after the Ross procedure is 96.2%. Young adults also do well, with 89% free from any reoperation at 10 years and 83% at 15 years. Because the transplanted valve is living tissue from the patient’s own body, it can even grow with a child, making it particularly valuable in pediatric cases. It also avoids blood thinners entirely and carries an inherent advantage for women who plan to become pregnant, since warfarin poses risks during pregnancy.
Success Rates and Risks
Modern AVR is a high-success procedure. In a large study at Cleveland Clinic, the operative death rate for surgical aortic valve replacement was 0.43%, far lower than the expected rate of 1.6%. One-year survival across the study was 98%.
That said, any heart procedure carries risks. The most significant include bleeding, infection, stroke, irregular heart rhythms, and the possibility of needing a permanent pacemaker afterward. With TAVR specifically, there is a higher chance of needing a pacemaker compared to open surgery, particularly with certain valve designs. Leaking around the edges of the new valve (paravalvular regurgitation) is also more common with TAVR than with surgically sewn valves.
For TAVR patients who can’t have the catheter inserted through the leg due to peripheral artery disease, alternative access points (through the chest wall or other arteries) carry higher complication rates. In one major trial, 30-day mortality was 4% for the standard leg approach versus 12% for alternative routes.
What Recovery Looks Like
Recovery depends heavily on which procedure you had. After open surgery, most patients spend about a week in the hospital. The breastbone, which is divided during surgery, takes roughly 6 to 8 weeks to heal. During that time, you’ll be advised to avoid lifting anything heavy, driving, or strenuous activity. Cardiac rehabilitation, a structured exercise program supervised by specialists, typically begins a few weeks after discharge and helps rebuild strength and endurance over the following months. Most people return to their normal routine within 2 to 3 months.
TAVR recovery is faster. Hospital stays are often just 1 to 3 days, and many patients are back to light activity within a week or two. Because there’s no chest incision, the physical restrictions are far less demanding.
Regardless of the approach, you’ll have follow-up appointments to monitor how the new valve is functioning, typically with echocardiograms (ultrasound images of the heart). If you received a mechanical valve, regular blood tests to manage your blood thinner will become a permanent part of your routine. Bioprosthetic valve recipients need ongoing monitoring to watch for signs of structural deterioration, especially as the valve ages past the 5-year mark.