Abstract:
BACKGROUND:Certain conditions characterised by blood vessel occlusion or vascular spasm have been found to cluster together in epidemiological studies. However the biological causes for these associations remain controversial. This study used a classical twin design to examine whether these conditions are linked through shared environmental exposures or by a common underlying genetic propensity to vasospasm. METHODS:We investigated the association between hypertension, migraine, Raynaud's phenomenon and coronary artery disease in twins from a national register. Phenotype status was determined using a questionnaire and the genetic and environmental association between phenotypes was estimated through variance components analysis. RESULTS:Responses were obtained from 2,204 individuals comprising 525 monozygotic and 577 dizygotic pairs. There was a significant genetic contribution to all four traits with heritabilities ranging from 0.34 to 0.64. Multivariate model-fitting demonstrated that a single common genetic factor underlies the four conditions. CONCLUSIONS:We have confirmed an association between hypertension, migraine, Raynaud's phenomenon and coronary artery disease, and shown that a single genetic factor underlies them. The demonstration of a shared genetic factor explains the association between them and adds weight to the theory of an inherited predisposition to vasospasm.
journal_name
BMC Cardiovasc Disordjournal_title
BMC cardiovascular disordersauthors
Williams FM,Cherkas LF,Spector TD,MacGregor AJdoi
10.1186/1471-2261-4-20keywords:
subject
Has Abstractpub_date
2004-11-01 00:00:00pages
20issue
1issn
1471-2261pii
1471-2261-4-20journal_volume
4pub_type
杂志文章abstract:BACKGROUND:Patients with chronic aortic valve regurgitation (AR) causing left ventricular (LV) volume overload can remain asymptomatic for many years despite having a severely dilated heart. The sudden development of heart failure is not well understood but alterations of myocardial energy metabolism may be contributiv...
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pub_type: 临床试验,杂志文章,多中心研究
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pub_type: 杂志文章,多中心研究,随机对照试验
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