Abstract
Background: To determine the prevalence of anti-β-adrenoceptors autoantibodies (aβAA) in patients with idiopathic arrhythmias (IA) and to assess whether aβAA are predictive markers for concealed cardiomyopathy in such patients. Methods and Results: Sixty-seven patients (group 1) with IA [25 supraventricular (SVA) and 42 ventricular (VA)]; 14 patients (group 2) with suspected cardiomyopathy, 12 patients with definite cardiomyopathy (group 3); and 19 healthy controls (group 4) were tested with an enzyme immunoassay, using synthetic peptides corresponding to the second extracellular loop of the human β1- and β2-adrenoceptors. Endomyocardial biopsy was performed in 29 patients. As compared with group 4 [3/19 (15.7%)], anti-β1-adrenoceptor autoantibodies (aβ1AA) were more frequent in group-1 patients [38/67 (56.7%; P
Original language | English |
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Pages (from-to) | 1345-1353 |
Number of pages | 9 |
Journal | Circulation Journal |
Volume | 76 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2012 |
Keywords
- β-adrenoceptors
- Arrhythmia
- Biopsy
- Cardiomyopathy
- Myocarditis
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine