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Using B-type natriuretic peptide (BNP) and the early diastolic velocity to early diastolic annular velocity ratio (E/Ea) to predict left ventricular (LV) filling pressures in patients presenting with acute dyspnea. Left atrial volume indexed to body surface area (LAVi) ≥32 mL/m2 is enlarged and LAVi <32 mL/m2 is normal. NT-proBNP N-terminal proBNP
