Japan Opened Complex Heart Procedures to Smaller Hospitals. Safety Held Steady.

Based on research from Juntendo University and collaborators, published in JACC: Advances (2026)

For patients living in rural or underserved areas, a diagnosis involving severely calcified coronary arteries can mean more than a medical challenge. It can mean hours of travel to reach one of a handful of hospitals authorized to perform rotational atherectomy (RA), a specialized procedure that uses a high-speed diamond-tipped burr to break through hardened plaque blocking blood flow to the heart. In Japan, until recently, only large training hospitals with on-site cardiac surgery backup could offer RA. That restriction kept a proven treatment out of reach for many patients who needed it most. In 2020, Japanese regulators made a pivotal decision: they lifted some of those facility requirements. A major new study confirms that the gamble paid off.

Key Discovery

Researchers from Juntendo University, Harvard, and Kyoto University analyzed 1.16 million percutaneous coronary intervention (PCI) procedures performed at 1,243 hospitals across Japan between 2019 and 2023. Their findings, published in JACC: Advances in 2026, deliver a clear verdict: expanding access to rotational atherectomy by allowing smaller, non-training hospitals to perform the procedure did not lead to higher complication rates.

Before the policy change, RA was effectively restricted to facilities designated as cardiovascular training centers, which typically had on-site surgical teams and higher procedural volumes. After Japanese regulators relaxed these requirements in 2020, RA use grew steadily, rising from 4.2% of all PCI procedures to 5.2% over the study period. That increase was driven largely by adoption at smaller hospitals that had previously been unable to offer the technique.

The critical safety question—whether hospitals without the same level of backup resources could perform RA safely—was answered definitively. Mortality rates and major adverse cardiovascular events remained comparable between training facilities and non-training facilities throughout the study period. Complication rates did not increase even as the pool of hospitals performing RA expanded significantly.

Why This Matters

Rotational atherectomy is not a niche procedure. As populations age, heavily calcified coronary lesions are becoming more common, and standard balloon angioplasty or stenting often fails to adequately treat these blockages. RA provides a way to prepare calcified vessels for stent placement, improving both the immediate success of the procedure and long-term outcomes. Restricting it to a small number of hospitals creates a bottleneck that disproportionately affects patients in rural communities and smaller cities.

The Japanese policy reform addressed a tension that healthcare systems around the world face: balancing safety standards against equitable access. Facility requirements exist for good reason—complex procedures carry risks, and patients benefit from being treated in well-resourced environments. But overly restrictive regulations can create their own harms by forcing patients to delay treatment, travel long distances, or forgo procedures entirely. The Juntendo-Harvard-Kyoto study provides hard evidence that, at least for RA, the safety guardrails can be adjusted without compromising patient outcomes.

This finding resonates far beyond cardiology. Across medicine, debates over where and by whom procedures can be performed shape patient access in fundamental ways. Surgical volume thresholds, facility certification mandates, and specialist availability requirements all serve protective functions, but they also concentrate care in urban centers and large academic institutions. The Japanese experience with RA suggests that carefully designed policy reforms—guided by data rather than assumption—can widen access without sacrificing quality.

The Bigger Picture

The study arrives at a moment when healthcare systems globally are grappling with how to deliver specialized care more broadly. Several converging trends make the findings particularly timely.

Telemedicine and remote procedural support are changing what it means for a hospital to have access to specialist expertise. A smaller facility performing RA in 2023 is not operating in isolation the way it might have a decade ago. Real-time teleconsultation, remote imaging review, and digital case planning allow interventional cardiologists at major centers to support colleagues at community hospitals without either party leaving their facility. The Japanese data suggest that this evolving support infrastructure may be sufficient to maintain safety standards even when on-site surgical backup is not immediately available.

Task-shifting in medicine—the practice of enabling less specialized providers or facilities to deliver care that was previously restricted to highly specialized settings—has gained traction in fields ranging from HIV treatment in sub-Saharan Africa to cataract surgery in India. The RA policy reform in Japan represents a form of institutional task-shifting: the procedure itself still requires a trained interventional cardiologist, but the facility no longer needs to meet the highest tier of institutional requirements. The safety data from this study support the principle that task-shifting, when implemented thoughtfully, does not inherently compromise care quality.

Healthcare access equity remains one of the most persistent challenges in modern medicine. In Japan, as in many countries, the concentration of advanced medical capabilities in major urban centers means that patients in rural prefectures face systematic disadvantages. By demonstrating that RA can be performed safely in a broader range of hospitals, this study provides policymakers with evidence to support reforms that bring advanced cardiovascular care closer to where patients actually live.

The scale of the dataset—1.16 million procedures across 1,243 hospitals over four years—gives the findings substantial weight. This is not a single-center pilot or a small retrospective review. It is a nationwide analysis that captures the real-world impact of a specific policy change across an entire healthcare system.

Limitations and What Comes Next

Several limitations deserve consideration. The study is observational, meaning it can identify associations but cannot prove that the policy change alone caused the observed safety outcomes. Other factors—improvements in device technology, better operator training programs, evolving patient selection criteria—may have contributed to maintaining safety during the expansion period.

Japan's healthcare system has characteristics that may limit the generalizability of these findings. The country has universal health coverage, standardized training pathways, and relatively uniform quality benchmarks across its hospital system. In countries with greater variation in hospital resources, regulatory frameworks, or physician training, relaxing facility requirements might produce different results. Any attempt to replicate this policy reform elsewhere would need to account for local conditions and include robust monitoring systems.

The study period also overlapped with the COVID-19 pandemic, which disrupted healthcare delivery patterns in complex ways. While the researchers accounted for temporal trends, the pandemic may have influenced both the types of patients presenting for PCI and the operational conditions at participating hospitals.

Looking ahead, the research team has noted the importance of longer-term follow-up. While in-hospital outcomes were comparable, tracking patients over months and years will be essential to confirm that the safety equivalence holds for late complications, stent durability, and overall cardiovascular outcomes. Future studies may also examine whether the policy change improved access for specific patient populations, such as elderly patients or those in the most geographically isolated regions.

At a Glance

• Japan relaxed facility requirements for rotational atherectomy in 2020, allowing smaller hospitals to perform the procedure.
• A study of 1.16 million PCI procedures at 1,243 hospitals (2019–2023) found no increase in complications after the policy change.
• RA use rose from 4.2% to 5.2% of all PCI procedures, driven by adoption at non-training facilities.
• Mortality and adverse event rates remained comparable between training and non-training hospitals.
• The findings support evidence-based policy reform to expand access to specialized cardiovascular procedures.
• Implications extend to broader debates over healthcare equity, telemedicine support, and task-shifting in medicine.