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Surgical delay for acute type A dissection with malperfusion

G M Deeb1, D M Williams, S F Bolling

  • 1Section of Thoracic Surgery, The University of Michigan Hospitals, Ann Arbor 48109-0344, USA. mdeeb@umich.edu

The Annals of Thoracic Surgery
|January 22, 1998
PubMed
Summary

Delayed surgical repair for acute type A aortic dissection with malperfusion, following percutaneous reperfusion, significantly improves patient outcomes. This approach reduces mortality associated with reperfusion injury, leading to better long-term results.

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Area of Science:

  • Cardiovascular Surgery
  • Thoracic Surgery
  • Vascular Surgery

Background:

  • Acute type A aortic dissection is a life-threatening surgical emergency.
  • Preoperative malperfusion in type A dissection is linked to high intraoperative (22%) and hospital (89%) mortality.
  • Deaths result from pulmonary failure due to capillary leak or multiorgan failure from reperfusion injury.

Purpose of the Study:

  • To evaluate the efficacy of a delayed surgical repair strategy for acute type A aortic dissection with malperfusion.
  • To assess the impact of percutaneous reperfusion on patient outcomes.

Main Methods:

  • A cohort of 20 patients with type A dissection and malperfusion underwent percutaneous reperfusion followed by delayed surgical repair.
  • Malperfusion was diagnosed using Doppler echocardiography or CT scanning and confirmed by angiography.

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  • Patients received beta-blockers post-reperfusion; surgery was delayed until reperfusion injury resolved. Statistical analyses included Fisher's exact test, Student's t test, and logistic regression.

    • Main Results:

    • The average delay to surgical repair was 20 days.
    • Fifteen patients (75%) were discharged after repair, with a mean follow-up of 16.8 months.
    • Delayed repair was the sole independent predictor of improved outcome, with a 12% mortality rate among those undergoing surgery.

    Conclusions:

    • Percutaneous reperfusion followed by delayed surgical repair is recommended for patients with acute type A aortic dissection and malperfusion.
    • Delaying surgery allows for resolution of reperfusion injury, improving patient survival and outcomes.