SCIENTIFIC BACKGROUND

DES, DMD, DMPK, DSP, EMD, GATA4, GJA5, GJC1, GLA, LAMP2, LMNA, MYL4, NKX2-5, PRKAG2, SCN5A, TBX5, TNNI3K, TRPM4

Cardiac conduction disease (CCD) is a heterogeneous and often age-related progressive condition characterized by impaired electrical impulse propagation in the AV node and the His-Purkinje system. Typical features include prolonged P-wave duration, AV block, and various degrees of bundle branch block, which in severe cases can lead to syncope or even sudden cardiac arrest. Acquired CCD can result from cardiac fibrosis, ischemia, valve calcifications, tumors, or thyroid dysfunctions. However, hereditary factors play a significant role in familial forms of CCD. Additionally, CCD can occur with cardiomyopathies, typically dilated cardiomyopathy (DCM), or syndromic diseases.

 

While the diagnostic sensitivity of molecular genetic analysis is not yet fully established, recent studies suggest that approximately half of all index patients exhibit relevant (potentially) pathogenic variants. These occur in roughly 20% of cases in both the SCN5A and LMNA genes and in about 5-10% in the TRPM4 gene.

 

GENES

DES, DMD, DMPK, DSP, EMD, GATA4, GJA5, GJC1, GLA, LAMP2, LMNA, MYL4, NKX2-5, PRKAG2, SCN5A, TBX5, TNNI3K, TRPM4
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