Why the study?
Although a cardiothoracic ratio of at least 0.50 is widely used to indicate cardiomegaly, its association with left ventricular systolic dysfunction had not been investigated previously.
Does CT-measured cardiothoracic ratio predict left ventricular systolic dysfunction in emergency department patients?
Does CT-measured cardiothoracic ratio predict left ventricular systolic dysfunction in emergency department patients?
A CT-measured cardiothoracic ratio cutoff of 0.56 is a useful screening tool to predict mild left ventricular systolic dysfunction, challenging the traditional 0.50 cutoff for cardiomegaly.
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CT cardiothoracic ratio ≥0.56 may aid mild LVSD screening in ED patients; hypothesis-generating and requires prospective validation.
Chae et al. (2023) studied this question.
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