Three-dimensional echocardiographic measurement of left ventricular volume in vitro: Comparison with two-dimensional echocardiography and cineventriculography

摘要: Objetives. This study was designed to compare three-dimensional echocardiography, two-dimensional echocardiography and cineventriculography for the purpose of measuring left ventricular volume in vitro. Background. Three-dimensional echocardiographic systems have been shown be highly accurate volumes balloon phantoms, However, techniques not compared with standard vitro or cineventriculography, clinical measurement. Methods. Excised porcine hearts were prepared an internal latex sheath that could filled maintained a known (“true”) liquid. Each heart then imaged by echocardiography. Left calculated from 15 at 25 ranging 50 280 ml following methods: 1) biplane using area-length method; 2) apical method summation discs algorithm cases single-plane, four-chamber 10 cases; 3) polyhedral surface reconstruction computation based on multiple nonparallel, nonevenly spaced short-axis cross sections. Results. Results true volume, nonparametric analysis variance performed. Both measurement bias (systematic error) imprecision (random assessed. All methods tended underestimate (two-dimensional −6.1 ± 17.6%, −4.7 5.0% −3.9 8.2%), although differences significant. Although there significant correlation between magnitude size being measured fairly constant over range volumes. When accounted for, significantly less precise than terms percent error (15.3 11.9%, 5.6 5.7% 3.9 3.4%, respectively). Conclusions. provides accuracy comparable cineventri-culography this model. Standard is other two methods.