The clinical and CMR Characteristics of Hypertrophic Cardiomyopathy with Restrictive Phenotype

Results Patients of HCM with restrictive phenotype have more severe clinical symptoms including sustained artrial fibrillation, pericardial effusion, and worse heart function classifications compared with controls; The left and right atrium diameter were 55.79 ± 5.34 mm and 61.33 ± 11.05 mm on MR, which were significantly greater than the controls (p < 0.001); The segments with late gadolinium enhancement were 7.68 ± 2.98 in patients with restrictive phenotype, which were significantly greater than controls (5.10 ± 2.77, p = 0.008). The left ventricular end-diastolic volume index, the cardiac index, and the left heart ejection fraction of patients with restrictive phenotype were all significantly less than those of the controls.