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Z-score Coronary Origin (Pediatric Database) Calculator

Z-score Coronary Origin (pediatric database): Explanation and Clinical Context This calculator normalizes measured coronary internal diameters to body size using a log-linear z-score model widely used in pediatric echocardiography. The typical modelling approach (used by Dallaire & Dahdah and others) fits a regression of the natural logarithm of coronary diameter (mm) against the natural logarithm of body surface are

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Z-score Pulmonary Artery (CHD Reference Model) Calculator

Z-score Pulmonary Artery (CHD Reference Model): Explanation and Clinical Context Z-score of the pulmonary artery is a dimensionless value that expresses how many standard deviations an individual’s pulmonary artery diameter deviates from the predicted mean for a given body size. In patients with congenital heart disease (CHD), accurate assessment of pulmonary artery size is crucial for surgical planning, prosthesis s