Circulation, Vol 69, 874-879, Copyright © 1984 by American Heart Association
K Andersen and H Vik-Mo
The effects of quiet respiration on assessment of left ventricular function
by two-dimensional echocardiography were investigated in 12 healthy men.
End-diastolic area in the parasternal short-axis view decreased with
inspiration (from 17.3 +/- 2.1 [mean +/- SD] to 16.0 +/- 2.1 cm2, p less
than .01), while end-systolic area did not change (from 7.6 +/- 1.4 to 7.7
+/- 1.5 cm2; NS). A fixed cursor that was located through the center of the
left ventricular area at end-expiration made a tangential cut of the area
at end-inspiration were smaller along the cursor than through the center of
the short-axis area both at end- diastole (1.9 +/- 1.7 mm; p less than .01)
and end-systole (3.8 +/- 4.0 mm; p less than .01). Our results suggest a
need for standardization with regard to respiratory phases in assessment of
left ventricular function by two-dimensional echocardiography and indicate
the occurrence of inspiratory reduction of left ventricular stroke volume
associated with decreased diastolic filling. Motion of the heart relative
to the echo beam may play a part in the respiratory variations in left
ventricular dimensions assessed by M mode echocardiography.
ARTICLES
Effects of spontaneous respiration on left ventricular function assessed by echocardiography
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