ORIGINAL ARTICLE
Year : 2021  |  Volume : 6  |  Issue : 2  |  Page : 132-140

Differential diagnosis of PRKAG2 Cardiac syndrome in hypertrophic cardiomyopathy patients of han nationality


1 Department of Echocardiography; Department of Cardiology, Zhongshan Hospital, Fudan University; Departments of Cardiology, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
2 Department of Echocardiography; Department of Cardiology, Zhongshan Hospital, Fudan University; Departments of Cardiology, Shanghai Institute of Cardiovascular Diseases; Departments of Echocardiography, Shanghai Institute of Medical Imaging, Shanghai, China
3 Department of Echocardiography, Zhongshan Hospital, Fudan University; Departments of Cardiology, Shanghai Institute of Cardiovascular Diseases; Departments of Echocardiography, Shanghai Institute of Medical Imaging, Shanghai, China

Correspondence Address:
Xian-Hong Shu
Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2470-7511.320319

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Objectives: This study aimed to diversify the spectrum of PRKAG2 variants and explore its clinical features in a Chinese Han population with hypertrophic cardiomyopathy (HCM). Methods: Whole-exome sequencing was performed on 200 patients diagnosed with HCM, and four causative PRKAG2 variants were identified in the probands and their relatives using Sanger sequencing. Their clinical manifestations, laboratory examinations, therapeutic methods, and outcomes were documented and analyzed. Results: Four variants were identified in six probands and seven of their relatives. Left ventricular hypertrophy was present in all probands. Five probands had sinus bradycardia, three had implanted pacemakers (PM), one developed heart failure, two had ventricular preexcitation, and one had atrial fibrillation. Conclusions: PRKAG2 cardiac syndrome (PCS) is a rare autosomal dominant disease characterized by ventricular hypertrophy, preexcitation, and progressive conduction defects, resulting in a high incidence of PM implantation. Genetic testing provides robust information for distinguishing PCS from sarcomeric HCM, which will be beneficial in guiding therapy and improving prognosis.


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