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- W2904169516 abstract "Background We present an ancillary study of the Portuguese Registry of Hypertrophic Cardiomyopathy (PRo-HCM). This is one of the largest HCM genetic studies based on a registry. Methods and results Collected genetic variants were re-analysed for pathogenicity. Demographic, clinical, imaging and outcome data were analysed for associations with genotype, focusing on comparisons between patients with (G+) vs without (G−) a pathogenic/likely pathogenic (P/LP) variant in one the 9 main causal sarcomeric genes. From the 1042 patients in the registry, 528 (51%) had genetic testing. 152 (28%) were G+ and 98 pts. (19%) had variants of unknown significance. From the patients with the 9 mentioned genes sequenced (424 pts), 14.6% had P/LP variants in MYBPC3, 8.7% MYH7, 4.5% TNNT2, 1.7% TNNI3. Patients were 51 ± 16 years-old, 59% males. Genotype was associated with the following: birthplace (p = 0.005); age (p < 0.001); family history of HCM (p < 0.0005); hypertension (p < 0.0005); chest pain (p = 0.015); pattern of hypertrophy (p = 0.006); left ventricular hypertrophy on the ECG (p < 0.0005); family history of sudden cardiac death (SCD) (p = 0.002). G+ patients more frequently had more than one risk factor for SCD (p = 0.002) and a higher ESC-SCD risk score (p = 0.003). In survival analysis, G+ was associated with SCD (p = 0.017) and MYH7+ with LV systolic dysfunction (p = 0.038). Conclusion Half of the registry patients had genetic testing. Sarcomere-positive patients had distinct demographics, ECG, imaging characteristics and family history and are at increased risk of SCD. The presence of a MYH7 mutation was associated with evolution towards LV systolic dysfunction." @default.
- W2904169516 created "2018-12-22" @default.
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- W2904169516 date "2019-03-01" @default.
- W2904169516 modified "2023-10-16" @default.
- W2904169516 title "Genetic characterization and genotype-phenotype associations in a large cohort of patients with hypertrophic cardiomyopathy – An ancillary study of the Portuguese registry of hypertrophic cardiomyopathy" @default.
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- W2904169516 doi "https://doi.org/10.1016/j.ijcard.2018.12.012" @default.
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