Background:Acute Type A aortic dissection (ATAAD) is a cardiac surgical emergency associated with high rates of mortality and morbidity. The Ascyrus Medical Dissection Stent (AMDS) is a novel hybrid device that has demonstrated promise in stabilizing the aortic arch, eliminating distal anastomosis new reentry tears and improving malperfusion syndromes. This report examines early outcomes of ATAAD patients treated with the AMDS device compared with a sole hemiarch repair. Methods:This retrospective study included all patients who underwent emergency surgery for computed tomography confirmed ATAAD at our center from January 2024 to November 2025. Iatrogenic, subacute, and chronic dissections were excluded from the study as were patients who received any form of arch surgery. Results:Six patients received the AMDS device and hemiarch, whereas 18 patients received a hemiarch repair only. A 30-day mortality was 16.7 and 22.2% in the AMDS and hemiarch cohorts, respectively (p>0.99). The 30-day stroke rate was 50 and 27.8% in the AMDS and hemiarch cohorts, respectively (p=0.36). Mean intensive care unit length of stay was 11 days in both cohorts, whereas hospital length of stay was 20 and 18 days in the AMDS and hemiarch cohorts, respectively. Conclusion:This study has demonstrated the relative safety of the AMDS device when used as an adjunct to the standard hemiarch repair in the management of ATAAD patients. Long-term outcome data are required to determine the extent of the positive aortic remodeling effect of the AMDS device and its impact on aortic reintervention and survival.
Abstract:Indirect innominate artery (IA) cannulation provides important advantages of central arterial inflow and antegrade cerebral perfusion in proximal aortic surgery but is often avoided when the artery is dissected. We describe a stepwise technique enabling indirect cannulation of a dissected IA through circumferential false lumen exclusion and adventitia-true lumen reapproximation. In nine patients with dissected IA undergoing this approach, cannulation was successfully achieved without in-hospital mortality or permanent neurological deficit.
Abstract:Patient factors can present formidable challenges in emergent aortic surgery. We report successful mechanical aortic root, ascending aorta, and Zone 2 arch replacement under hypothermic circulatory arrest in a 305 kg patient with acute type A aortic dissection. A dual-oxygenator bypass circuit, proactive metabolic management, bilateral fasciotomies, and early renal replacement therapy were critical to a favorable outcome.
Abstract:Porcelain aortic arch with coronary artery disease poses a major surgical challenge. We report a 66-year-old man with a large arch pseudoaneurysm, circumferential arch calcification, left common carotid artery thrombosis, and triple-vessel coronary disease who underwent single-stage total arch replacement with coronary artery bypass grafting. Surgery utilized axillary and femoral cannulation, hypothermic circulatory arrest, and selective antegrade cerebral perfusion. Complete recovery followed a transient postoperative neurological deficit, demonstrating feasibility of tailored open repair.
Abstract:Optimal management of the aortic arch during repair of acute type A aortic dissection remains debated. Hemiarch repair can achieve acceptable early survival, but persistent false lumen perfusion and residual distal dissection may contribute to later distal aortic enlargement or reintervention in a subset of patients. The frozen elephant trunk (FET) technique aims to improve distal aortic remodeling by covering intimal tears, expanding the true lumen, and promoting false lumen thrombosis, but it adds operative complexity because it requires more extensive arch reconstruction and supra-aortic vessel management. The Ascyrus Medical Dissection Stent (AMDS), an uncovered nitinol stent, has emerged as an adjunct to hemiarch repair. It is intended to reduce distal anastomotic new entry tears, support true lumen expansion, and facilitate distal aortic stabilization without formal total arch replacement. Contemporary evidence from the DARTS and PERSEVERE studies and observational series suggests that FET and AMDS may serve different operative goals in selected patients, although their roles are overlapping rather than mutually exclusive. FET may be more suitable when more extensive distal arch or proximal descending aortic pathology is present, whereas AMDS may be considered when a less extensive arch procedure is desired in the setting of arch instability or malperfusion. Neither approach should be viewed as universally superior. Instead, strategy should be individualized on the basis of patient age, intimal tear location, malperfusion status, operative risk, and institutional experience. AMDS may represent an additional option in selected high-risk patients.
