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ECV % Threshold Index (Amyloid Detection) Calculator
ECV% Threshold Index (Amyloid Detection): Explanation and Clinical Context Extracellular Volume (ECV) quantification by cardiac MRI provides a non-invasive measure of myocardial amyloid infiltration. Elevated ECV% indicates expansion of the extracellular matrix, commonly due to amyloid fibril deposition. ECV > 40% is strongly suggestive of cardiac amyloidosis, while values between 30–39% indicate intermediate probabi