Abstract
Two-dimensional echocardiography can provide serial cross-sectional images of the left ventricular cavity. The authors examined whether such serial images from steady-state ejecting hearts would allow three-dimensional reconstruction and accurate volume estimation without major geometric assumptions. Cross-circulated, paced dog hearts were suspended in a blood-filled tank. Serial cross-sectional images were taken at 3-mm intervals along the vertical axis. Left ventricular cavity and muscle areas of each image were planimetered with a light-pen system and summated for volume: total volume = Σ (areas x 3 mm). Direct left ventricular volume was measured through the cardiac cycle with a volumetric chamber connected to a balloon in the ejecting left ventricle. In six hearts, 67 separate direct volume measurements (range 9.5-54.7 ml) from various points in the cardiac cycle were compared with the simultaneous echo volume measurements. By least squares linear regression, echo volume = 1.01 (direct volume) - 0.44 ml; r=0.972, SEE = 2.93 ml. Provided accurate cross-sectional localization is available, these studies suggest that extremely accurate steady-state left ventricular volume can be determined noninvasively in the ejecting heart from multiple cross-sectional images.
Original language | English (US) |
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Pages (from-to) | 320-326 |
Number of pages | 7 |
Journal | Circulation |
Volume | 60 |
Issue number | 2 |
DOIs | |
State | Published - 1979 |
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Physiology (medical)