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Eur J Cardiothorac Surg 2002;21:970-974
© 2002 Elsevier Science NL

Thoracoabdominal or descending aortic aneurysm repair after preoperative demonstration of the Adamkiewicz artery by magnetic resonance angiography

Nobuyoshi Kawaharadaa*, Kiyofumi Morishitaa, Johji Fukadaa, Akira Yamadaa, Satoshi Murakia, Hideki Hyodohb, Tomio Abea

a Department of Thoracic and Cardiovascular Surgery, Sapporo Medical University School of Medicine, South 1 West 16, Chuo-ku, Sapporo 060-8543, Japan
b Department of Radiology, Sapporo Medical University School of Medicine, South 1 West 16, Chuo-ku, Sapporo 060-8543, Japan

Received 16 September 2001; received in revised form 6 February 2002; accepted 11 February 2002.

* Corresponding author. Tel.: +81-11-611-2111, ext. 3312; fax: +81-11-613-7318
e-mail: nobuyosh{at}sapmed.ac.jp

Objective: The outcome of thoracoabdominal or descending aortic aneurysm repair after preoperative demonstration of the artery of Adamkiewicz (ARM) by magnetic resonance angiography (MRA) was investigated. Methods: Between January 2000 and December 2001, 40 consecutive patients who had aneurysms of the thoracoabdominal or descending aorta underwent preoperative MRA to visualize the ARM. Thirty-two patients underwent replacement of the aneurysms, and 25 patients (TAAA, 11; TAA, 14) underwent replacement of the aneurysms with preoperative detection of the ARM. Only intercostal or lumbar arteries in aneurysms, which were detected as the origin of the ARM, were reattached to the graft. The results of thoracoabdominal aortic aneurysm operations in 11 patients in whom the ARM was preoperatively detected (group I) were compared with the results of TAAA operations in 26 patients in whom the ARM was not preoperatively detected (group II). Results: MRA demonstrated the ARM in 29 (73%) of the 40 patients. The laterality of the arteries originated from the left side in 29 (100%) and between Th9 and Th12 in 25 (86%), between Th9 and L1 in 28 (97%) of the 29 patients. No spinal cord injury occurred in patients (TAAA and TAA) in whom the ARM had been preoperatively detected. Major complications following TAAA operations included paraplegia (0% in group I and 8% in group II), respiratory failure (9% in group I and 23% in group II), and renal failure requiring hemodialysis (18% in group I and 22% in group II). Operation times were 439±99 min in group I and 620±200 min in group II (P=0.008). Conclusions: Preoperative detection of the ARM is possible by MRA and is very useful for reducing the incidence of ischemic injury of the spinal cord and for reducing the time of an operation for repair of an aneurysm of the thoracoabdominal or descending aorta.

Key Words: Thoracoabdominal aortic aneurysm • Thoracic aortic aneurysm • Magnetic resonance angiography • Adamkiewicz artery • Paraplegia




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