Deepthi Rajan, Christopher Ryan Zörner, Morten Lock Hansen, Jacob Tfelt-Hansen
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Arrhythmias and Sudden Death: What is New in Hypertrophic Cardiomyopathy?
Hypertrophic cardiomyopathy (HCM) is a complex genetic disorder that has garnered significant attention because of its diverse manifestations, including arrhythmias and heightened risk of sudden cardiac death. Advances in precision diagnostics, such as genetic testing and cardiac imaging with late gadolinium enhancement, have refined HCM diagnosis, enabling targeted therapeutic and risk stratification approaches. AF, prevalent in HCM, exacerbates symptoms and stroke risk, while ventricular arrhythmias pose a direct threat to survival. Catheter ablation offers symptom relief in AF patients with HCM, yet recurrence remains high because of unique myocardial changes, highlighting the need for refined patient selection and long-term monitoring. The risk of sudden cardiac death in HCM, particularly in younger individuals, underscores the importance of precise risk stratification tools such as the European Society of Cardiology HCM Risk-SCD model. The expanding role of ICDs and emerging pharmacological agents, including myosin inhibitors, marks a shift toward more individualised management of HCM. This review integrates recent developments in arrhythmia management, targeted therapies and risk assessment, offering a comprehensive perspective on HCM tailored to improve clinical outcomes through a precision-medicine lens.