Carey P H, Slutsky R A, Ashburn W L, Higgins C B
Radiology. 1982 Jun;143(3):623-6. doi: 10.1148/radiology.143.3.7043645.
To determine the validity of cardiac output estimates obtained by digital video subtraction angiography (DVSA), they were compared with thermodilution values in 6 anesthetized dogs. Multiple levels of cardiac output were produced in each dog by graded openings of peripheral arteriovenous fistulas. Both direct contrast and mask-mode images were evaluated. There was good correlation between thermodilution and direct contrast values (r = 0.88) as well as between thermodilution and mask-mode values (r = 0.89), though the mask-mode outputs were 12 +/- 1.1% less than the direct contrast values (p less than 0.05). Direct contrast and mask-mode values correlated well (n = 6; r greater than or equal to 0.95). Digital outputs exhibited little variation, indicating excellent reproducibility. These results demonstrate the validity of area-length estimates of cardiac output by DVSA.
为确定数字视频减影血管造影术（DVSA）所获得的心输出量估计值的有效性，将其与6只麻醉犬的热稀释法测量值进行了比较。通过逐步开放外周动静脉瘘，在每只犬身上产生多个心输出量水平。对直接造影图像和掩模模式图像均进行了评估。热稀释法与直接造影值之间具有良好的相关性（r = 0.88），热稀释法与掩模模式值之间也具有良好的相关性（r = 0.89），尽管掩模模式输出值比直接造影值低12±1.1%（p < 0.05）。直接造影值与掩模模式值相关性良好（n = 6；r≥0.95）。数字输出变化很小，表明具有出色的可重复性。这些结果证明了DVSA通过面积-长度法估计心输出量的有效性。
