Document Detail


Cardiac sarcoidosis and giant cell myocarditis as causes of atrioventricular block in young and middle-aged adults.
MedLine Citation:
PMID:  21427276     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Cardiac sarcoidosis (CS) and giant cell myocarditis (GCM) may present as high-degree atrioventricular block (AVB), but their proportion of the causal spectrum of AVB is not well-known. We investigated the prevalence of biopsy-verified CS and GCM in young and middle-aged adults undergoing pacemaker (PM) implantation for AVB.
METHODS AND RESULTS: We used the PM registry of Helsinki University Central Hospital to identify all patients aged 18 to 55 years who underwent PM implantation for AVB between January 1999 and April 2009 and reviewed their medical records. In total, 133 patients had either second- or third-degree AVB as an indication for PM. Of them, 61 had a known cause for AVB, and they were excluded from further analyses. Among the remaining 72 patients with initially unexplained AVB, biopsy-verified CS or GCM was found in 14 (19%) and 4 (6%) patients, respectively. The majority (16/18, 89%) were women. Among the adult patients aged <55 years, the prevalence of CS and GCM combined was 14% (95% CI, 7.7% to 19.3%) of the whole AVB population and 25% (95% CI, 15% to 35%) of those with an initially unexplained AVB. Over an average of 48 months of follow-up, 7 (39%) of 18 patients with CS or GCM versus 1 of the 54 patients in whom AVB remained idiopathic, experienced either cardiac death, cardiac transplantation, ventricular fibrillation, or treated sustained ventricular tachycardia (P<0.001).
CONCLUSIONS: CS and GCM explain ≥25% of initially unexplained AVB in young and middle-aged adults. These patients are at high risk for adverse cardiac events.
Authors:
Riina Kandolin; Jukka Lehtonen; Markku Kupari
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-03-22
Journal Detail:
Title:  Circulation. Arrhythmia and electrophysiology     Volume:  4     ISSN:  1941-3084     ISO Abbreviation:  Circ Arrhythm Electrophysiol     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-06-15     Completed Date:  2011-09-01     Revised Date:  2012-02-03    
Medline Journal Info:
Nlm Unique ID:  101474365     Medline TA:  Circ Arrhythm Electrophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  303-9     Citation Subset:  IM    
Affiliation:
Division of Cardiology, Department of Medicine, Helsinki University Central Hospital, Finland. riina.kandolin@hus.fi
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Age Factors
Atrioventricular Block / epidemiology,  etiology*,  physiopathology
Biopsy
Cardiomyopathies / complications*,  diagnosis,  epidemiology
Diagnosis, Differential
Female
Finland / epidemiology
Follow-Up Studies
Giant Cells / pathology*
Humans
Incidence
Magnetic Resonance Imaging, Cine / methods
Male
Middle Aged
Myocarditis / complications*,  diagnosis,  epidemiology
Myocardium / pathology*
Positron-Emission Tomography
Prognosis
Retrospective Studies
Risk Factors
Sarcoidosis / complications*,  diagnosis,  epidemiology
Young Adult
Comments/Corrections
Comment In:
Circ Arrhythm Electrophysiol. 2011 Jun;4(3):260-1   [PMID:  21673024 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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