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- W285141620 abstract "Right and left ventricular (RV, LV) ejection fractions (EF) were calculated from first-pass and gated blood-pool scans in 19 patients with different cardiac diseases and in 5 normal subjects. Both types of scans were obtained after a single adequate bolus injection of technetium pertechnetate. Ejection-fractions from both data collection modes were calculated with a combination of threshold and second derivative computer algorithms. Right ventricular ejection fraction (RVEF) by first-pass technique was 25 +/- 11.7 (mean +/- s.d.) for patients and 29 +/- 2.9 for controls; and by gated equilibrium scan was 34 +/- 10.3 for patients and 31 +/- 0.9 for controls. Left ventricular ejection fraction (LVEF) by first pass was 28 +/- 11.9 for patients and 38 +/- 9.6 for controls; and by gated equilibrium scan was 40 +/- 12 for patients and 62 +/- 8.9 for controls. Ejection fraction data from first-pass and gated equilibrium scans were analyzed with linear regression techniques. The correlation coefficient for RVEFs by the two methods was 0.46 for patients and 0.99 for controls; for LVEFs it was 0.63 for patients and -0.11 for controls. Although both of these values for patients were statistically significant, there was wide scatter between EF values obtainedmore » with the two methods in the patient group and in the control group for LVEFs. Thus, one method cannot be substituted for the other to provide reproducible and reliable information concerning RV and LV function in patients with cardiac disease, or for LV function in the controls.« less" @default.
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- W285141620 date "1985-09-01" @default.
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- W285141620 title "Calculation of Right and Left Ventricular Ejection Fraction Using First Pass and Gated Blood-Pool Scans" @default.
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