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Table 2 Relative intra-observer variability for measurement of ventricular diameters from recorded echocardiographic loops

From: Correlation between end-tidal carbon dioxide and the degree of compression of heart cavities measured by transthoracic echocardiography during cardiopulmonary resuscitation for out-of-hospital cardiac arrest

 Maximal diameter of the left ventricleMinimal diameter of the left ventricleMaximal diameter of the right ventricleMinimal diameter of the right ventricle
Absolute difference (% ± SD)1.10 ± 3.701,37 ± 2.22.01 ± 2.31.89 ± 2.3