Heyde's syndrome

Jump to: navigation, search

WikiDoc Resources for Heyde's syndrome

Articles

Most recent articles on Heyde's syndrome

Most cited articles on Heyde's syndrome

Review articles on Heyde's syndrome

Articles on Heyde's syndrome in N Eng J Med, Lancet, BMJ

Media

Powerpoint slides on Heyde's syndrome

Images of Heyde's syndrome

Photos of Heyde's syndrome

Podcasts & MP3s on Heyde's syndrome

Videos on Heyde's syndrome

Evidence Based Medicine

Cochrane Collaboration on Heyde's syndrome

Bandolier on Heyde's syndrome

TRIP on Heyde's syndrome

Clinical Trials

Ongoing Trials on Heyde's syndrome at Clinical Trials.gov

Trial results on Heyde's syndrome

Clinical Trials on Heyde's syndrome at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Heyde's syndrome

NICE Guidance on Heyde's syndrome

NHS PRODIGY Guidance

FDA on Heyde's syndrome

CDC on Heyde's syndrome

Books

Books on Heyde's syndrome

News

Heyde's syndrome in the news

Be alerted to news on Heyde's syndrome

News trends on Heyde's syndrome

Commentary

Blogs on Heyde's syndrome

Definitions

Definitions of Heyde's syndrome

Patient Resources / Community

Patient resources on Heyde's syndrome

Discussion groups on Heyde's syndrome

Patient Handouts on Heyde's syndrome

Directions to Hospitals Treating Heyde's syndrome

Risk calculators and risk factors for Heyde's syndrome

Healthcare Provider Resources

Symptoms of Heyde's syndrome

Causes & Risk Factors for Heyde's syndrome

Diagnostic studies for Heyde's syndrome

Treatment of Heyde's syndrome

Continuing Medical Education (CME)

CME Programs on Heyde's syndrome

International

Heyde's syndrome en Espanol

Heyde's syndrome en Francais

Business

Heyde's syndrome in the Marketplace

Patents on Heyde's syndrome

Experimental / Informatics

List of terms related to Heyde's syndrome

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

Heyde's syndrome is a syndrome of aortic valve stenosis associated with gastrointestinal bleeding from colonic angiodysplasia. It is named after Dr. Edward C. Heyde, who first described the association in 1958.

Signs and symptoms

Aortic valve stenosis is a cause of heart failure and several other cardiac problems. In most patients, however, it goes unsuspected. A number of patients develop a bleeding tendency resembling that of platelet-derived coagulation problems, e.g. nosebleeds, bruising. Some bleed from angiodysplasias (small vascular malformations) of the colon. This can be subtle, causing mild anemia, or serious, warranting blood transfusions and surgery to control bleeding.

Diagnosis

Angiodysplasias are usually identified on colonoscopy. In some patients, the cause of bleeding cannot be identified on colonoscopy, and only angiography of the colonic vasculature can identify the location of the angiodysplasias.

Aortic valve stenosis is identified on echocardiography (ultrasound studies of the heart), where a decreased Orifice Area of the aortic valve implies stenosis.

Routine testing for Von Willebrand disease (see below) generally fails to identify the coagulation abnormality, as only the high-molecular weight-multimers (HMWM) of von Willebrand factor are decreased. Only dynamic platelet function analysis (PFA) might be of some use in this respect.

Pathophysiology

In the 45 years following its initial description, no plausible explanations could be found for the association between aortic valve stenosis and gastrointestinal bleeding. Indeed, the association itself was questioned by a number of researchers. A number of reports stressed, however, that replacement of the diseased aortic valve often led to resolution of the coagulopathy.

Warkentin et al (1992) proposed that the link between aortic stenosis and bleeding was due to a mild form of von Willebrand disease. Some later reports confirmed the suspicion, including a 2002 study by the same group that showed resolution of the coagulation abnormality after aortic valve replacement.

In 2003 a study by Vincentelli et al finally gave an explanation for the remarkable phenomenon. It showed how the subtle form of von Willebrand disease present in Heyde syndrome patients resolved rapidly after heart valve replacement of the stenosed aortic valve. The coagulation abnormality, the study poses, is possibly caused by the increased breakdown of the very large von Willebrand factor molecule by its natural catabolic enzyme (named ADAMTS13) under conditions of high shear stress around the valve.

Therapy

Symptomatic treatment can be given in the form of blood transfusions. Desmopressin (DDAVP) releases Factor VIII storage pools and is used in mild to moderate cases of von Willebrand disease. Other approaches, including estrogen therapy, are discussed in the angiodysplasia article.

Vincentelli et al argue that severe forms of Heyde's syndrome might be sufficient reason for aortic valve replacement, even if the stenosis is otherwise clinically unimportant and is not likely to cause complications.

History

The syndrome was originally described in 1958 by Dr Edward C. Heyde, an internist living and working in Vancouver, WA in a letter to the New England Journal of Medicine. He reported ten patients with the association.

The statistical association was proven before there was any clue why patients with aortic valve stenosis had a higher occurrence of colonic bleeding. Already in 1958, a letter in the New England Journal of Medicine (Goldman et al) reported an odds ratio of almost 3.0 between the two diseases.

References

  • Goldman MJ. Aortic stenosis and gastrointestinal bleeding. N Engl J Med 1958;259:941.
  • Heyde EC: Gastrointestinal bleeding in aortic stenosis. N Engl J Med 1958;259:196.
  • Vincentelli A, Susen S, Le Tourneau T, et al. Acquired von Willebrand syndrome in aortic stenosis. N Engl J Med 2003;349:343-9. PMID 12878741
  • Warkentin TE, Moore JC, Morgan DG. Aortic stenosis and bleeding gastrointestinal angiodysplasia: Is acquired von Willebrand's disease the link? Lancet 1992;340:35-7. PMID 1351610.
  • Warkentin TE, Moore JC, Morgan DG. Resolution of bleeding from gastrointestinal angiodysplasia and von Willebrand syndrome type 2A after aortic valve replacement. N Engl J Med 2002;347:858-9. PMID 12226167.
  • Warkentin TE, Moore JC, Anand SS, Lonn EM, Morgan DG. Gastrointestinal bleeding, angiodysplasia, cardiovascular disease, and acquired von Willebrand syndrome. Transfus Med Rev 2003;17:272-86. PMID 14571395.

See also



Linked-in.jpg