European Heart Journal Advance Access originally published online on August 7, 2006
European Heart Journal 2006 27(18):2208-2216; doi:10.1093/eurheartj/ehl184
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Arrhythmogenic right ventricular cardiomyopathy caused by deletions in plakophilin-2 and plakoglobin (Naxos disease) in families from Greece and Cyprus: genotypephenotype relations, diagnostic features and prognosis
1 Department of Cardiology, Nicosia General Hospital, Nicosia, Cyprus
2 Department of Cardiology, Yannis Protonotarios Medical Centre, Naxos, Cyclades, Greece
3 1st Department of Cardiology, University of Athens, Athens, Greece
4 Department of Medicine, University College London and University College London Hospital Trust, London, UK
Received 1 May 2006; revised 6 July 2006; accepted 20 July 2006; online publish-ahead-of-print 7 August 2006.
* Corresponding author. Tel: +30 22850 23234; fax: +30 22850 26175. E-mail address: nprotnaxos{at}altecnet.gr
Aims To evaluate clinical disease expression, non-invasive diagnosis, and prognosis in families with dominant vs. recessive arrhythmogenic right ventricular cardiomyopathy (ARVC) due to mutations in related desmosomal proteins plakophilin-2 (PKP2) and plakoglobin (JUP), respectively.
Methods and results One hundred and eighty-seven individuals belonging to ARVC families, four with dominant PKP2 mutations and 12 with recessive JUP mutation underwent serial non-invasive cardiac assessment. Survival and arrhythmic events were evaluated prospectively up to 21 years (median 8.5 years). Sixteen of 22 PKP2 carriers and all 26 homozygous JUP carriers fulfilled the diagnostic criteria for ARVC, the youngest by the age of 13 years. Clinical disease expression did not differ significantly between PKP2 and JUP carriers. T-wave inversion in leads V1V3, right ventricular wall motion abnormalities, and frequent ventricular extrasystoles were the most sensitive/specific markers for identification of mutation carriers. QRS dispersion
40 ms was an independent predictor of syncope but not of sudden death.
Conclusion Mutations in PKP2 and JUP express similar cardiac phenotype. Non-invasive family screening may largely be based on T-wave inversion, right ventricular wall motion abnormalities, and frequent ventricular extrasystoles to identify mutation carriers.
Key Words: Cardiomyopathy Cell adhesion molecules Death Sudden Electrocardiography Echocardiography
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