Routine Safety Wire in Heart Valve Procedures May Do More Harm Than Good

A large single-centre study from Germany has delivered an uncomfortable verdict on one of interventional cardiology’s long-standing safety rituals: the routine placement of a femoral protection wire during transfemoral transcatheter aortic valve implantation, or TAVI. According to the analysis of 1,476 consecutive patients treated at the University Medical Centre Mainz between January 2020 and August 2023, abandoning the routine protection wire was associated with significantly fewer vascular complications overall, without any increase in the major, potentially life-threatening events the wire was designed to prevent. The findings, published in Clinical Research in Cardiology, add fuel to an increasingly heated debate about how much access-site armour a modern TAVI procedure actually needs.

Transfemoral TAVI has become the treatment of choice for patients with severe aortic stenosis who face elevated surgical risk, and its use is steadily expanding into lower-risk populations. The procedure involves threading a collapsible replacement valve through the femoral artery to the heart, a route that demands large-bore sheaths, often 14 French or larger, to deliver the prosthesis. In the technique’s early years, major vascular complications occurred in roughly 15 percent of patients, a figure that made the femoral access site the most dangerous few centimetres of the entire operation. The protection wire technique, introduced in 2010, was conceived as an insurance policy: an additional guidewire placed via the ipsilateral or contralateral femoral artery, providing immediate endovascular access for percutaneous bailout if catastrophic injury occurred at the primary puncture site.

But the landscape has shifted dramatically since 2010. Lower-profile delivery systems, ultrasound-guided puncture, refined vascular closure strategies, and the growing use of transradial secondary access have pushed major vascular complication rates below 2 percent in low-risk populations. Against that backdrop, the protection wire has begun to look less like a safety net and more like a source of its own problems, because it requires an additional arterial puncture that must itself be managed, compressed, and closed. The Mainz team, led by Marc Adrian Rogmann and Martin Geyer, exploited a natural experiment embedded in their institutional practice: until November 2021, protection wire placement was standard of care for every transfemoral TAVI, after which the wire was abandoned except in operator-selected high-risk cases.

The results were striking. The composite of minor and major vascular complications, classified according to the Valve Academic Research Consortium-3 criteria, occurred in 18.6 percent of patients in the routine protection wire era compared with just 10.8 percent after the protocol change, a difference that was highly statistically significant. Major vascular complications were numerically less frequent without routine wire use, at 2.5 percent versus 4.2 percent, and in-hospital mortality was low and comparable between the two groups, at 2.3 percent and 2.8 percent respectively. Most tellingly, 34.8 percent of all access-related vascular complications in the routine wire group were directly attributable to the protection wire access itself, with the vast majority being minor bleedings at the ipsilateral distal femoral puncture site.

The technical explanation for this pattern is instructive. The protection wire access point, typically a small distal puncture through a 4 French sheath, is not covered by the primary closure device or the pressure dressing applied at the main access site. The researchers propose that many of these injuries arose not from technically inadequate punctures but from insufficient haemostatic compression at a site that the standard closure routine simply overlooks. In the routine wire group, 80.1 percent of protection wires were positioned ipsilaterally, meaning two punctures in the same femoral artery, one of which received far less haemostatic attention. The wire was actively used for intervention in only 25 cases, or 3.1 percent of the routine group, suggesting that the insurance policy paid out far less often than it cost in collateral injury.

Bleeding metrics reinforced the picture. Type 1 and type 2 bleedings under the VARC-3 classification occurred significantly less often without routine wire placement, at 3.3 percent versus 6.1 percent and 3.3 percent versus 7.6 percent respectively. The median haemoglobin drop was smaller in the wire-free era, decreases greater than 3 grams per decilitre were less frequent, and post-procedural haemoglobin values were slightly higher. Procedural times were marginally shorter without the wire, fluoroscopy times were essentially identical, and blood transfusion rates remained low and comparable, indicating that omitting the wire imposed no penalty on procedural efficiency or safety rescue capability.

In a multivariable logistic regression model covering 1,417 patients, the absence of a routine protection wire was independently associated with a lower risk of vascular complications, with an odds ratio of 0.52 and a 95 percent confidence interval of 0.38 to 0.72. Female sex emerged as an independent predictor of increased risk, with an odds ratio of 1.82, consistent with prior evidence attributing the excess to smaller vessel diameters and greater vessel fragility. The closure strategy also mattered: a combination of two suture devices plus one plug-based device was associated with higher odds of complications than suture-only closure, although the authors caution that this combination was typically deployed as a rescue when primary suture haemostasis failed, introducing confounding by indication that limits generalisation.

The findings sit in tension with the SURF-TAVR registry, the largest multicentre study of protection wire use to date, which reported fewer major vascular complications with routine wire placement, at 1.1 percent versus 2.4 percent. The Mainz authors point to important procedural differences: their routine wire era relied exclusively on angiographic rather than ultrasound-guided puncture, their secondary access was predominantly transradial rather than femoral, and their wire placement was overwhelmingly ipsilateral. Both studies, however, converge on one consistent message: overall vascular complication rates were higher with routine protection wire use, driven mainly by minor secondary-access injuries. The authors are candid about the limitations of their before-and-after design, acknowledging that calendar time, evolving case mix, and concurrent refinements in technique cannot be fully disentangled from the wire strategy itself, and that a prospective randomised trial would be needed to isolate the effect.

Nevertheless, the study’s strengths lend it weight. All patients were included consecutively, outcomes were assessed with standardised VARC-3 definitions, and the systematic documentation of complications by individual access site offers a granularity that multicentre registries cannot match. As TAVI continues its expansion into broader and lower-risk populations, the message from Mainz aligns with the broader minimalist turn in structural heart intervention: minimise access burden, favour ultrasound-guided puncture, choose closure devices carefully, and reserve the protection wire for the individual patients whose anatomy and risk profile genuinely warrant it. In contemporary practice, the best safety wire may be the one you never place.

Subject of Research: Impact of routine versus selective femoral protection wire use on vascular complications in transfemoral TAVI

Article Title: Routine versus selective use of a femoral protection wire in transfemoral TAVI: a single-centre analysis of vascular complications

Article References: Rogmann, M. A., Klingemann, V., Meertens, M., Ahoopai, M., Rommel, K.-P., Lurz, P., von Bardeleben, R. S., & Geyer, M. (2026). Routine versus selective use of a femoral protection wire in transfemoral TAVI: a single-centre analysis of vascular complications. Clinical Research in Cardiology. https://doi.org/10.1007/s00392-026-03015-0

Image Credits: AI Generated

DOI: 10.1007/s00392-026-03015-0

Keywords: TAVI, vascular complications, protection wire, femoral access, VARC-3, transcatheter aortic valve implantation, vascular closure devices, transradial access, aortic stenosis, bleeding events, interventional cardiology, Routine