title: Hypothermic circulatory arrest for thoracic aneurysmectomy through left-sided thoracotomy.
abstract: OBJECTIVE
  In an attempt to clarify the role of hypothermic circulatory arrest (HCA) in the management of complex aortic aneurysms operated on through the left thoracotomy, our technique of HCA and outcome were reviewed.
  
  
  METHODS
  During a 21-month period, 15 (17%) of 87 aneurysms of the descending thoracic or thoracoabdominal aorta were operated on by HCA. Eleven patients had chronic aortic dissections (four type A and seven type B), two patients had atherosclerotic aneurysms, and one each had congenital or infected postoperative aneurysms. The use of HCA was planned before surgery in 14 patients. Indications included proximal aortic disease in 12 patients, making either clamping of the transverse aortic arch unsafe (eight patients) or necessitating replacement of the arch with a graft (four patients). Preoperative decision to use HCA was made in two additional patients, one with a ruptured aneurysm and another patient for spinal cord and visceral protection because of anticipated prolonged ischemia as a result of reoperation. Intraoperative technical difficulties prompted the use of HCA in only one patient. Deep hypothermia (15 degrees to 24 degrees C) was induced through partial cardiopulmonary bypass. Left-sided heart venting was necessary in five patients. Aortic replacement was limited to the descending thoracic aorta in five patients, whereas it involved the thoracoabdominal aorta in 10 patients. Four patients had associated replacement of the aortic arch.
  
  
  RESULTS
  Three patients died (one of a ruptured aneurysm) during surgery or early after surgery (two of bleeding and one of left ventricular failure). All other patients awoke neurologically intact, but one patient had delayed onset of paraplegia. Another patient died 4 days after surgery of rupture of the ascending aorta. Eleven patients were perioperative survivors without significant morbidity.
  
  
  CONCLUSIONS
  Hypothermic circulatory arrest is a valuable adjunct in the management of complex aortic aneurysms through left-sided thoracotomy. Its results warrant consideration of its selective use for spinal cord/visceral protection.
authors.affiliation: Service de Chirurgie Vasculaire, Pitié-Salpêtrière University Hospital, Paris, France.
authors.forename: E
authors.initials: E
authors.lastname: Kieffer
authors.forename: F
authors.initials: F
authors.lastname: Koskas
authors.forename: R
authors.initials: R
authors.lastname: Walden
authors.forename: G
authors.initials: G
authors.lastname: Godet
authors.forename: D
authors.initials: D
authors.lastname: Le Blevec
authors.forename: A
authors.initials: A
authors.lastname: Bahnini
authors.forename: M
authors.initials: M
authors.lastname: Bertrand
authors.forename: M H
authors.initials: MH
authors.lastname: Fleron
mesh_terms: D000328:Adult; D000368:Aged; D000714:Anastomosis, Surgical; D000784:Aortic Dissection / Q000601:surgery; D017544:Aortic Aneurysm, Abdominal / Q000601:surgery; D017545:Aortic Aneurysm, Thoracic / Q000601:surgery*; D001019:Aortic Rupture / Q000601:surgery; D016063:Blood Loss, Surgical; D001807:Blood Vessel Prosthesis; D002315:Cardiopulmonary Bypass; D002423:Cause of Death; D005260:Female; D006324:Heart Arrest, Induced / Q000379:methods*; D006801:Humans; D007036:Hypothermia, Induced / Q000379:methods; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D015996:Survival Rate; D013908:Thoracotomy / Q000379:methods*; D016896:Treatment Outcome