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GENETICS OF MYOCARDITIS IN ARRHYTHMOGENIC RIGHT VENTRICULAR DYSPLASIA
Autores:
JUAN RAMÓN GIMENO BLANES
,
Grupos de investigación:
[GI/IMIB/C002/2011] CARDIOLOGIA CLINICA Y EXPERIMENTAL
Comunicación:
Antecedentes:
Myocarditis occasionally is related to arrhythmogenic right ventricular dysplasia (ARVD) and sometimes overlaps during the early stages, which may lead to misdiagnosis. Acute myocarditis may reflect an active phase of ARVD.
Métodos:
Two groups were analyzed:groupA, which consisted of 131 affected patients —84 with ARVD (62% male, age 45 years [range 33–55 years]) and 47 with left-sided forms (arrhythmogenic left ventricular dysplasia [ALVD])(47% male, age 45 years [range 25–61 years]); and group B, which consisted of 64non-affected mutation-carrying relatives (36% male, age 42 years [range 22–56 years]; 23 from classic ARVD families and 41 from ALVD families).
Resultados:
7 patients(3.5%) presented with a clinical diagnosis of acute myocarditis over median follow-up of 34 months. Myocarditis was the first clinical presentation in 6 of 7 cases. In 2 patients, acute myocarditis preceded worsening of left ventricular systolic function. In 1 case, myocarditis was associated with an increased gadolinium pattern in cardiac magnetic resonance. Two patients presented with ECG changes weeks after myocarditis resolution. Myocarditis preceded the development of ventricular tachycardia in 2 other patients. Myocarditis clustered in families bearing DSP Q447* and LDB3 c.1051A4G.
Conclusiones:
Acute myocarditis reflects an active phase of ARVD that leads to changes in phenotype and abrupt progression of the disease. An active phase should be suspected in a patient with myocarditis associated with a family history of ARVD. Certain mutations may increase the susceptibility to superimposed myocarditis in ARVD.
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