Rationale and design of multicenter prospective observational study of types, GRAde, VariabilITY, associations and prognosis of orthostatic responses in Heart Failure (GRAVITY-HF)

Heart failure (HF) is one of the leading causes of adult mortality. Increased risk of death determines need for better understanding of the pathophysiological mechanisms, predictive risk stratification models and applicable methods to improve prognosis. One of the unfavorable prognostic factors may be an inadequate hemodynamic response to orthostatic stress. Orthostatic hypotension (OH) is known to be an independent predictor of many cardiovascular diseases, particularly HF, and death. Singlecenter study of HF population revealed that systolic blood pressure within 3-5 minutes after standing up may be a predictor of long-term unfavorable outcomes. Nevertheless, data about OH in patients with HF are limited and inconsistent due to heterogeneity of populations and different methodology in published studies. In this regard, a population-based study of the orthostatic response in patients with HF (stable and decompensated) is needed. The article describes the rationale and design of a multicenter prospective observational study aimed to assess the clinical and prognostic significance of orthostatic responses in HF patients.

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