Effect of respiration on echocardiographic ventricular dimensions and relationship to the second heart sound.


The effects of normal respiration on echocardiographic right and left ventricular dimensions were studied in 8 normal subjects (group 1) and in 10 patients with ventricular volume overload due to anaemia (group 2). Right ventricular internal diameter (RVID) increased on inspiration in both groups of patients (group 1, 0.3 +/- 0.1 cm; group 2, 0.6 +/- 0.4 cm… (More)


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