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Among 25 patients with severe mitral regurgitation, cardiothoracic ratio was normal in 20 (80%) patients whereas cardiac enlargement was documented in 17 (68%) patients on echocardiography.
Keywords: Chest radiography, echocardiography, cardiothoracic ratio, aortic regurgitation, mitral regurgitation, children
One of the methods used to quantify the heart size on chest radiography is the cardiothoracic ratio (1).
It has been demonstrated that the traditional linear cardiothoracic ratio shows an inverse correlation with the left ventricular ejection fraction (5).
7) demonstrated that, although there was good correlation between the radiographic total cardiac volume and echocardiographic ventricular volumes, especially for left-sided lesions in children, cardiothoracic ratio and cardiac frontal area did not correlate with echocardiographic measurements.
Relationship of cardiothoracic ratio and plain film heart volume to late survival.