Yes, TAVR can be repeated. The procedure, commonly called redo-TAVR or TAVR-in-TAVR, involves placing a new transcatheter valve inside the original one when it fails. Registry data show it is feasible and has safety outcomes similar to a first-time TAVR, with 30-day mortality around 2.5%. However, a second TAVR introduces unique anatomical challenges that make careful patient selection essential.
How Long a TAVR Valve Lasts
TAVR valves are bioprosthetic, meaning they’re made from biological tissue that gradually wears out. How quickly that happens depends on the valve type and the patient. In the NOTION trial, which followed patients for eight years, about 14% of those with a self-expanding TAVR valve developed significant structural deterioration, compared to 28% of patients who had traditional open-heart surgery. Earlier-generation balloon-expandable valves tended to deteriorate faster, with some studies showing moderate wear in roughly 14% of patients at five years.
Valve failure doesn’t always mean the leaflets have worn out structurally. It can also result from blood clots forming on the leaflets, tissue growing in ways that distort the valve, or leaking around the edges where the valve meets the surrounding tissue. The most common reason patients need a redo procedure is aortic regurgitation, where blood leaks backward through or around the valve. This accounts for about 78% of redo-TAVR cases.
When a Second TAVR Is Considered
Doctors classify valve deterioration into stages based on how much it affects blood flow. Early deterioration (stage 1) involves visible changes to the valve structure without meaningful hemodynamic consequences. Stage 2 means moderate worsening, with the pressure gradient across the valve rising meaningfully or new leakage developing. Stage 3, severe deterioration, involves a large increase in the pressure gradient or severe regurgitation. A repeat procedure typically becomes relevant once deterioration reaches stage 2 or 3 and symptoms appear, such as worsening shortness of breath, chest pain, or reduced exercise tolerance.
Beyond symptoms and hemodynamics, the anatomy around the original valve plays a decisive role. Not every patient with a failing TAVR valve is a good candidate for a second one. CT imaging is used to simulate what would happen if a new valve were placed inside the old one, specifically looking at whether the coronary arteries would remain accessible and unobstructed.
The Coronary Obstruction Problem
This is the biggest technical concern with redo-TAVR. When a second valve is deployed inside the first, the leaflets of the original valve get pinned upward between the two metal frames. Those pinned leaflets form a tube-like structure (called a neoskirt) that can block the openings to the coronary arteries, cutting off blood supply to the heart muscle.
An American Heart Association simulation study using CT scans of 81 patients found that coronary obstruction could occur in up to 23% of patients receiving a redo-TAVR with certain self-expanding valves. In the most conservative estimate, about 1 in 4 patients had anatomy that put them at risk. On the right side, the risk was even higher: CT predicted possible obstruction in up to 33% of patients when using conservative measurement thresholds.
Perhaps more concerning for long-term care, the same study found that future access to the coronary arteries after a TAVR-in-TAVR procedure would be exceedingly difficult or impossible in up to 78% of patients. That means if you later develop a blockage in a coronary artery and need a stent, threading a catheter to the right location could be technically unfeasible. The pinned leaflets from the first valve were predicted to extend above the junction of the aorta in 95% of cases, creating a physical barrier to standard catheter access.
Techniques to Reduce Risk
Several strategies help manage these challenges. Commissural alignment, where the new valve’s structural posts are deliberately positioned to line up with the original valve’s posts, can preserve gaps that allow access to the coronary arteries. This technique works with self-expanding valves but is not currently possible with balloon-expandable valves.
Balloon-expandable valves do have an advantage in another way: their shorter frame height means the pinned leaflets create a smaller neoskirt, reducing the extent to which coronary openings are blocked. For this reason, balloon-expandable designs are often a preferred component of redo-TAVR procedures, either as the original valve or the replacement.
For patients at high risk of coronary obstruction, a preventive technique called BASILICA can be performed. This involves using a catheter-delivered wire to intentionally split the leaflet of the original valve before deploying the new one, creating a gap that preserves blood flow to the coronary arteries. It adds complexity to the procedure and carries its own risks, including the possibility of equipment getting trapped between the two valve frames, but it can make an otherwise impossible redo-TAVR feasible.
Redo-TAVR vs. Redo Surgery
When a bioprosthetic valve fails, the alternative to a repeat TAVR is open-heart surgery to remove the old valve and implant a new one (redo surgical aortic valve replacement). A meta-analysis published in JACC: Cardiovascular Interventions found that valve-in-valve TAVR had roughly half the 30-day mortality of redo surgery. This advantage held up even in studies that matched patients by risk level. Hospital stays are also shorter with the catheter-based approach.
That said, the comparison isn’t straightforward. Patients selected for redo-TAVR tend to be those judged too high-risk for surgery, so the populations aren’t identical even in matched analyses. Surgery also offers advantages that matter for younger patients: the old valve is physically removed, coronary access is fully preserved, and there’s no concern about stacking multiple metal frames inside the aorta. For patients young enough to potentially need a third valve replacement down the road, surgically removing the failed TAVR valve and replacing it may be the better long-term strategy.
Planning for the Long Term
One of the most important shifts in TAVR planning is thinking ahead to the possibility of a redo from the very first procedure. CT simulation can now model what a future TAVR-in-TAVR would look like inside a specific patient’s anatomy, helping doctors choose valve types and positioning strategies that keep future options open.
Some anatomies are naturally well-suited to a redo-TAVR strategy: patients with larger aortic roots have more space around the valve, reducing the risk of coronary obstruction. Others may have anatomy where a redo-TAVR would be dangerous regardless of technique, and those patients might be better served by surgical explant if their original valve fails. This kind of forward-looking planning is especially important for patients in their 60s and 70s who receive TAVR, as they are more likely to outlive their first valve and need intervention again.