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Alkaptonuric aortic stenosis: a case report.

M E Gonzales1

  • 1Oakwood Hospital Annapolis Center, Wayne, Mich., USA.

AANA Journal
|September 17, 1999
PubMed
Summary
This summary is machine-generated.

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Alkaptonuria, a rare metabolic disorder, can lead to severe aortic stenosis. This case highlights the complex management and poor prognosis of advanced alkaptonuric aortic stenosis, emphasizing systemic disease impact.

Area of Science:

  • Biochemistry
  • Genetics
  • Cardiology

Background:

  • Alkaptonuria (AKU) is a rare autosomal recessive metabolic disorder caused by a deficiency in the enzyme homogentisic acid oxidase.
  • This deficiency leads to the accumulation of homogentisic acid, causing ochronotic pigment deposition in various tissues.
  • Clinical manifestations include arthropathy, urinary calculi, and cardiac valvular disease, with aortic stenosis being a particularly debilitating complication.

Observation:

  • A case of a 75-year-old woman with a history of AKU presenting with progressive dyspnea due to severe aortic stenosis.
  • The patient exhibited signs of congestive heart failure, hypotension, and oliguric renal failure, necessitating mechanical ventilation and intensive hemodynamic support.
  • Despite emergency aortic valve replacement, the patient's condition remained critical, ultimately leading to a fatal outcome.

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Findings:

  • Alkaptonuria's pathogenesis involves multisystemic involvement, similar to collagen vascular diseases.
  • Severe aortic stenosis in this AKU patient presented a complex anesthetic and surgical challenge.
  • The case underscores the significant morbidity and mortality associated with advanced alkaptonuric cardiovascular disease.

Implications:

  • Studying such cases provides valuable insights into the systemic effects of AKU and its impact on cardiovascular health.
  • Anesthetic considerations for patients with AKU and related collagen vascular diseases are critical for perioperative management.
  • This case emphasizes the need for early recognition and comprehensive management strategies for AKU complications.