Valvuloplasty is a procedure that widens a narrowed heart valve to restore blood flow. A doctor threads a thin, flexible tube called a catheter through a blood vessel (usually in the groin) and guides it to the affected valve. A small balloon at the tip of the catheter is then inflated to force the stiffened valve open. The whole process is done without open-heart surgery, which is why it’s sometimes called percutaneous balloon valvuloplasty.
How the Procedure Works
Heart valves can narrow over time as calcium deposits build up on the valve leaflets, the thin flaps of tissue that open and close with each heartbeat. This narrowing, called stenosis, forces the heart to work harder to push blood through a smaller opening. Valvuloplasty addresses this by physically cracking those calcium deposits apart.
The procedure begins with a local anesthetic at the insertion site, typically near the groin, along with sedation to help you relax. The doctor inserts a small guide into the blood vessel, then feeds the catheter through it and up into the heart. Contrast dye is injected so the valve and catheter are visible on imaging. Once the balloon is positioned inside the narrowed valve, it’s inflated to push the stiffened leaflets open. After the balloon is deflated, the catheter is removed. Most people are awake but sedated throughout.
Which Heart Valves Are Treated
Valvuloplasty can be performed on several heart valves, but the approach and expected results vary significantly depending on which one is involved.
Aortic valve: This is the most common target in adults. Aortic stenosis tends to develop in older adults as calcium gradually stiffens the valve. Balloon aortic valvuloplasty was first performed in 1986 on three elderly patients with severe calcific aortic stenosis, and all survived with significant reductions in valve pressure and improvement in symptoms. Today, it’s used less as a standalone fix and more as a bridge, buying time while a patient’s overall health is optimized for a more durable valve replacement procedure.
Mitral valve: The mitral valve sits between the left atrium and left ventricle. When it narrows, often due to rheumatic heart disease, a technique called percutaneous mitral commissurotomy can effectively double the valve opening area. Studies show the procedure cuts the pressure difference across the valve roughly in half, and it also significantly lowers elevated lung pressures that result from the blockage.
Pulmonary valve: Pulmonary valve stenosis is frequently a congenital condition found in children. Balloon valvuloplasty is well established as the primary treatment for this narrowing, often producing results comparable to surgical repair but without the risks and recovery time of open-heart surgery.
Valvuloplasty in Children
For infants and children born with narrowed heart valves, balloon valvuloplasty is often the first-line treatment. In one study of 21 pediatric patients ranging from newborns to 10-year-olds, the procedure reduced the pressure gradient across the aortic valve from an average of about 67 mmHg down to roughly 21 mmHg. That’s a dramatic improvement in how hard the heart has to work to pump blood forward.
The results in children tend to be more durable than in older adults, partly because the narrowing is caused by a structural defect in the valve rather than decades of calcium buildup. Still, younger age at the time of the procedure, smaller heart dimensions, and certain types of tissue scarring inside the heart are risk factors for worse outcomes. Some children will eventually need a repeat procedure or surgical valve replacement as they grow.
Valvuloplasty in Older Adults
In elderly patients with severe aortic stenosis, balloon valvuloplasty plays a different role. The long-term durability is limited: one large study found overall survival of 55% at one year and just 23% at three years. Restenosis, where the valve narrows again, is common within six months. Rehospitalization rates were high at 64%, though 61% of survivors at two years still reported improved symptoms.
Because of these limitations, valvuloplasty in older adults is rarely considered a permanent solution. Instead, it’s used strategically. For patients too frail or too sick to undergo valve replacement right away, valvuloplasty can reduce symptoms and improve heart function enough to allow physical rehabilitation, better nutrition, and recovery of heart muscle strength. This “bridge” period can make a patient a better candidate for a transcatheter valve replacement down the line. In some cases where no further intervention is possible, it serves as palliative treatment to relieve symptoms like breathlessness and fatigue.
Risks and Complications
Valvuloplasty is less invasive than open-heart surgery, but it carries real risks. In a study of over 300 high-risk or inoperable patients undergoing aortic valvuloplasty, serious adverse events occurred in about 16% of cases. The most common complication was vascular injury at the catheter insertion site, affecting roughly 7% of patients. Stroke occurred in about 2%, and roughly 1.3% developed significant valve leakage (where the valve doesn’t close properly after being stretched open). Procedural death occurred in about 1.6% of cases.
A notable post-procedure concern is kidney stress. About 11% of patients in that study showed a significant rise in markers of kidney strain, and a small number required temporary dialysis. These complication rates reflect a particularly high-risk patient population, so rates in healthier or younger patients tend to be lower.
Valvuloplasty vs. Valve Replacement
The choice between widening an existing valve and replacing it entirely depends on several factors: the severity of the valve disease, your age and overall health, and whether other heart conditions need to be addressed at the same time. Surgeons generally prefer repair when it’s feasible, because preserving the native valve lowers infection risk and can help the heart function more naturally.
For mitral stenosis caused by rheumatic disease, balloon valvuloplasty often delivers durable results and is the preferred first treatment. For aortic stenosis in adults, the calcification that caused the narrowing tends to return within months, making valve replacement the more lasting solution. In that context, valvuloplasty serves as a stepping stone rather than an endpoint. For children with congenital valve narrowing, balloon valvuloplasty frequently provides years of relief comparable to what surgery would achieve, making it the standard initial approach.
What Recovery Looks Like
Because valvuloplasty doesn’t require opening the chest, recovery is considerably faster than after surgical valve repair or replacement. You’ll typically need to lie flat for several hours after the procedure to allow the catheter insertion site to heal and prevent bleeding. Most people stay in the hospital for one to two days for monitoring.
In the days following the procedure, you’ll likely be asked to avoid heavy lifting and strenuous activity to protect the insertion site. Bruising or soreness in the groin area is common and usually resolves within a week or two. Many people notice an improvement in symptoms like shortness of breath relatively quickly, since the valve is immediately opened wider. Follow-up imaging is typically scheduled within the first few months to check whether the valve is maintaining its improved opening size or beginning to narrow again.