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In recent years, thoracic endovascular aortic repair (TEVAR) has been established as a reliable alternative to conventional surgical repair.1 The success of endovascular repair is critically dependent on adequate stent-graft deployment. Catheter-based 2-dimensional angiography is routinely performed before, during, and after stent-graft placement to ensure accurate positioning and confirm the absence of complications such as perigraft endoleaks. Computed tomography angiography (CTA) is also used to plan stent-graft deployment before intervention. Recent advances in imaging technology allow reusing the diagnostic volumetric data sets during intervention by overlying live fluoroscopy over the preacquired CTA.2 This article describes the first case of TEVAR under guidance of CTA superimposed on live fluoroscopy without the use of iodinated contrast agent before, during, and after deployment.An 82-year-old man was admitted to the hospital with an asymptomatic thoracic aneurysm of 65-mm diameter on the descending aorta extending from 85 mm below the left subclavian artery to 120 mm above the celiac trunk (Figure 1). Ten years earlier, the patient had undergone surgical repair of an abdominal aortic aneurysm. No other comorbidities existed. Given …

Zero-Contrast Thoracic Endovascular Aortic Repair Using Image Fusion