Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/28/2025

Risk of Cerebrovascular Accident in Aortic Graft Surgery

  • Composite valve graft procedures have a mortality rate of 1-5%, with stroke being one of the potential complications 1
  • Total arch replacement procedures carry a 2-7% risk of stroke, with higher rates (up to 14%) for emergency operations 2, 3
  • Descending thoracic aortic repairs have a lower risk of CVA but carry a 2-4% risk of spinal cord ischemia which can lead to paralysis 1
  • Thoracoabdominal repairs have a 3-10% risk of spinal cord ischemia, which is a different but significant neurological complication 1, 2

Risk Factors and Mitigation Strategies

  • Severe atherosclerosis and intraluminal thrombus of the aorta increase the risk of embolic stroke during catheter and guidewire manipulation 4, 5
  • Intentional coverage of the left subclavian artery during endovascular procedures may increase the risk of perioperative stroke 4, 5
  • Preoperative assessment of the patency of the contralateral right subclavian and vertebral arteries is recommended when left subclavian artery coverage is planned 4, 5
  • Verification of vertebral artery communication at the basilar artery by transcranial Doppler or angiography is recommended before covering the left subclavian artery 5
  • Cerebrospinal fluid (CSF) pressure monitoring and drainage are important strategies to minimize the risk of paraplegia, especially when covering most of the descending thoracic aorta or in patients with previous abdominal aneurysm repair 4, 6
  • Preventive cerebrospinal fluid drainage should be considered in high-risk patients 6

Patient-Specific Considerations

  • Patients with previous abdominal aneurysm repairs (either open or endovascular) have a 10-12% risk of spinal cord ischemia during thoracic endovascular procedures, compared to 2% in those without previous repairs 4, 5
  • For patients with Marfan syndrome, connective tissue disorders, or bicuspid aortic valves who undergo appropriate surgical repair, the long-term prognosis is excellent with an average survival of 70 years 2

Risk Assessment and Calculation

  • The Society of Thoracic Surgeons recommends using validated tools such as the STS PROM (Society of Thoracic Surgeons Predicted Risk of Mortality), considering factors such as age, frailty, organ system compromise, and procedure-specific impediments 7

REFERENCES

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