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Related Experiment Videos

Aortic valve replacement under deep hypothermic circulatory arrest.

Shuli Silberman1, Nadiv Shapira, Daniel Fink

  • 1Department of Cardiothoracic Surgery, Shaare Zedek Medical Center, Jerusalem, Israel. cts-szmc@szmc.org.il

Journal of Cardiac Surgery
|December 20, 2002
PubMed
Summary

Deep hypothermic circulatory arrest offers a safe alternative for aortic valve replacement (AVR) when aortic clamping is not feasible due to calcification or grafts. This method enables successful AVR in high-risk patients.

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Area of Science:

  • Cardiovascular Surgery
  • Thoracic Surgery
  • Cardiac Anesthesia

Background:

  • Aortic valve replacement (AVR) can be challenging with calcified aortas or patent grafts, often precluding standard aortic clamping.
  • Deep hypothermic circulatory arrest (DHCA) provides a viable alternative to overcome these surgical limitations.

Purpose of the Study:

  • To evaluate the safety and efficacy of AVR using DHCA in patients with prohibitive aortic clamping conditions.
  • To assess the feasibility of DHCA as an alternative surgical approach for complex AVR cases.

Main Methods:

  • Retrospective analysis of 415 AVR patients from 1993-2000, with 8 undergoing DHCA.
  • Indications included reoperation with patent grafts and/or severe aortic calcification.
  • Cardiopulmonary bypass via femoro-femoral or aortic-right atrial cannulation; retrograde cerebral perfusion used in 5 patients.

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Main Results:

  • No operative mortality observed in the DHCA group.
  • Zero instances of neurologic sequelae reported post-operatively.
  • Echocardiography confirmed excellent function of all replaced aortic valves.

Conclusions:

  • AVR under DHCA is a safe and effective procedure for patients unsuitable for conventional aortic clamping.
  • DHCA should be considered for patients deemed inoperable due to aortic conditions.
  • Successful implementation requires bypass capability and an accessible "window" for aortotomy.