1. Is Occult Genetic Substrate the Missing Link Between Arrhythmic Mitral Annular Disjunction Syndrome and Sudden Cardiac Death?
- Author
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Fabrizio Ricci, Mohammed Y Khanji, Sabina Gallina, Laura Ceriello, C. Anwar A. Chahal, Enrico Di Girolamo, Marianna Appignani, Eloisa Arbustini, Cesare Mantini, and Liborio Stuppia
- Subjects
Adult ,Cardiomyopathy, Dilated ,Genetic Markers ,Male ,medicine.medical_specialty ,Magnetic Resonance Imaging, Cine ,Sudden cardiac death ,LMNA ,Internal medicine ,medicine ,Humans ,Mitral valve prolapse ,cardiovascular diseases ,Mitral Valve Prolapse ,business.industry ,Genetic variants ,Dilated cardiomyopathy ,Syndrome ,Papillary Muscles ,Lamin Type A ,medicine.disease ,Occult ,Death, Sudden, Cardiac ,Echocardiography ,Tachycardia, Ventricular ,cardiovascular system ,Cardiology ,Mitral Valve ,Cardiology and Cardiovascular Medicine ,business - Abstract
We present the case of a 28-year-old man with a history of unexplained syncope, frequent ventricular arrhythmias, familial LMNA-related dilated cardiomyopathy (DCM), and mitral annular disjunction (MAD). We provide the first association of a novel truncating LMNA variant serving as a potential vulnerable substrate for arrhythmogenic MAD syndrome. This could suggest a possible synergistic role between concealed genetic variants (resulting in fibrosis as a "substrate" for arrhythmogenesis) and the presence of mitral annular disjunction (the "trigger" with mechanical stretch initiating ventricular arrhythmias), which may provide a link between mitral valve prolapse and sudden cardiac death.
- Published
- 2021