Familial Disease Is Not Always Genetic: A Family With Atrioventricular Block and Mitral Regurgitation
Canadian Journal of Cardiology, Volume 33, No. 4, Year 2017
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We present a family from a founder population referred for cardiogenetic evaluation for atrioventricular block in 3 siblings. Genetic testing, including whole-exome sequencing, did not identify a disease-causing mutation. After reconsidering the differential diagnosis, a nongenetic cause was identified. This case highlights the importance of a thorough clinical evaluation even when a genetic cause is seemingly obvious.