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Angiotensin-converting enzyme gene polymorphism in arrhythmogenic right ventricular dysplasia: is DD genotype helpful in predicting syncope risk?

Department of Cardiology, Faculty of Medicine, Marmara University, Istanbul, Turkey, bestes{at}doctor.com

Ibrahim Altun

Department of Cardiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Veysel Sabri Hancer

Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Ahmet Kaya Bilge

Department of Cardiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Azra Meryem Tanrikulu

Department of Cardiology, Faculty of Medicine, Marmara University, Istanbul, Turkey

Reyhan Diz-Kucukkaya

Division of Hematology, Department of Internal Medicine, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Ali Serdar Fak

Department of Cardiology, Faculty of Medicine, Marmara University, Istanbul, Turkey

Ercument Yilmaz

Department of Cardiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Kamil Adalet

Department of Cardiology, Faculty of Medicine, Istanbul University, Istanbul, Turkey

Introduction. Arrhythmogenic right ventricular dysplasia (ARVD) is a heritable disorder characterised by fibrofatty replacement of right ventricular myocytes and increased risk of ventricular arrhythmias and sudden cardiac death. Angiotensin-converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism affects myocardialACE levels. DD genotype favours myocardial fibrosis and is associated with malignant ventricular tachycardia.The aim of this study was to explore ACE gene polymorphism inARVD patients.

Methods. Twenty-nine patients with ARVD and 24 controls were included.AllARVD patients had documented sustained ventricular tachycardia. Thirteen patients had syncopal episodes. Six patients were resuscitated from sudden cardiac death.ACE gene polymorphism was identified by polymerase chain reaction technique.

Results. There was no significant difference in DD genotype frequency between ARVD patients and controls (44.8% vs. 45.8%, p=0.94). However, DD genotype frequency was significantly higher in ARVD patients with syncopal episodes compared to those without syncope (69.2% vs. 25.0%, p=0.017, odds ratio:6.750,95% confidence interval: 1.318—34.565). DD genotype was detected in higher frequency also in patients with a family history of sudden cardiac death (66.7% vs. 39.1%,p=0.36).

Conclusion. High prevalence of DD genotype in ARVD patients with syncope suggests that ACE I/D polymorphism might be useful in identifying high-risk patients for syncope.

Key Words: angiotensin-converting enzyme gene polymorphism • arrhythmogenic right ventricular dysplasia • sudden cardiac death • syncope • ventricular tachycardia

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Journal of Renin-Angiotensin-Aldosterone System, Vol. 9, No. 4, 215-220 (2008)
DOI: 10.1177/1470320308099126


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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Ozben, B. Articles by Adalet, K. Search for Related Content PubMed PubMed Citation Articles by Ozben, B. Articles by Adalet, K. Pubmed/NCBI databases Gene GEO Profiles HomoloGene UniGene Substance via MeSH Medline Plus Health Information Cardiomyopathy Fainting Social Bookmarking                         What's this?