Rich S, Sheikh A, Gallastegui J, Kondos G T, Mason T, Lam W
Am Heart J. 1982 Sep;104(3):603-6. doi: 10.1016/0002-8703(82)90233-2.
It has been shown that the measured reduction in the cross-sectional area of the left ventricle (LV), as viewed in the short axis, closely approximates its ejection fraction (EF). We assessed the reliability of using two-dimensional echocardiography (2DE) to visually estimate the EF during real-time viewing, without the need of digitizers, planimetry, or calculations. Twenty-five adult hospitalized patients with either suspected or known cardiac disease were evaluated prospectively. Each patient also had gated nuclear angiography during the same admission, and 14 had cardiac catheterization with left ventriculography. The EF was determined by 2DE using a visual estimate of the percent area reduction of the LV cavity in the short-axis view at the level of the papillary muscles. All 2 DE studies were read by two or more blinded reviewers, with a value for the EF to the nearest 2.5% determined by consensus. These values correlated closely to the values determined in all 25 patients with gated nuclear angiography (r = 0.927) and the 14 patients who had left ventriculography (r = 0.935). We believe that this method of visually estimating the LVEF will enable echocardiographers to easily use 2 DE for a reliable and instantaneous assessment of ventricular function, without the need of sophisticated analytical equipment.
研究表明，在短轴视图中测量的左心室（LV）横截面积的减小与射血分数（EF）密切相关。我们评估了在实时观察过程中，无需数字化仪、面积测量或计算，使用二维超声心动图（2DE）直观估计EF的可靠性。对25例疑似或已知心脏病的成年住院患者进行了前瞻性评估。每位患者在同一住院期间还进行了门控核素血管造影，其中14例进行了心脏导管检查及左心室造影。通过2DE，在乳头肌水平的短轴视图中，通过直观估计LV腔面积减少的百分比来确定EF。所有2DE研究均由两名或更多盲法审阅者阅读，通过共识确定最接近2.5%的EF值。这些值与所有25例进行门控核素血管造影患者（r = 0.927）和14例进行左心室造影患者（r = 0.935）所确定的值密切相关。我们认为，这种直观估计左心室射血分数的方法将使超声心动图医生能够轻松地使用2DE对心室功能进行可靠且即时的评估，而无需复杂的分析设备。
