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Purpose  The present study evaluated how heart failure (HF) negatively impacts health-related quality of life (HRQoL) in hypertrophic cardiomyopathy (HCM) patients and explored the major clinical determinants associated with HRQoL impairment in this population.    Methods  This was a cross-sectional single-center study of health-related HRQoL that included 91 consecutive patients with HCM. Evaluation was performed based on a comprehensive protocol that included the recommended diagnostic studies, as well as administration of the translated validated version of the Kansas City Cardiomyopathy Questionnaire (KCCQ) (CV Outcomes Inc) as a health status measure.    Results  The cohort included 52 (57%) males, median age 58 (20–85) years. The median global KCCQ score was 67 (12.5–100) corresponding to a moderate impairment in HRQoL. There was an inverse correlation between the median global KCCQ score and NYHA class (Kendall’s tau b coefficient r − 0.33, p = 0.001). Patients with pulmonary hypertension (PHT), defined as resting pulmonary artery systolic pressure of ≥ 45 mmHg, presented a significantly worse HRQoL as compared to those without PHT (median KCCQ score 56.2 vs 77.5, p = 0.013). The KCCQ score mildly correlated with age (r − 0.18, p = 0.014), history of syncope (r − 0.18, p = 0.045), estimated glomerular filtration rate (eGFR) (r 0.31, p < 0.001), plasmatic creatinine (r − 0.18, p = 0.017) and urea levels (r − 0.27, p < 0.001), left ventricular (LV) end-systolic dimensions (r − 0.18, p = 0.014), maximal provoked intraventricular gradient (r 0.20, p = 0.039), LV ejection fraction (r 0.15, p = 0.04), average E/e′ (r − 0.16, p = 0.039), pulmonary acceleration time (r 0.21, p = 0.007), pulmonary artery systolic pressure (r − 0.20, p = 0.016). In ordinal regression, the independent predictors of HRQoL were NYHA class and eGFR.    Conclusions  Patients with HCM and HF present a moderate degree of alteration in HRQoL. This is especially true for patients with PHT and more severe functional impairment. Renal failure and NYHA class are potential markers of HRQoL in clinical practice.

Quality of life status determinants in hypertrophic cardiomyopathy as evaluated by the Kansas City Cardiomyopathy Questionnaire