Table 2.
Inter breath-hold comparison between semi-automatic analyses of coronary blood flow parameters (mean +/−SD of paired differences, intraclass correlation coefficient (ICC)) in 15 vessels for two observers (obs 1 and obs2)
| mean+/−SD | mean (+/−SD) differences | ICC | ||||
|---|---|---|---|---|---|---|
| obs1 | obs2 | obs1 | obs2 | obs1 | obs2 | |
| mean velocity (mm/s) | 80.4+/−23.9 | 82.0+/−25.7 | −2.4+/−6.9 | 1.7+/−7.4 | 0.96 | 0.96 |
| flow (ml/min) | 61.1+/−26.7 | 62.4+/−28.0 | −1.9+/−4.8 | 0.8+/−5.5 | 0.99 | 0.96 |
| PSV (mm/s) | 73.4+/−33.3 | 74.7+/−31.1 | 1.7+/−15.8 | −0.1+/−12.6 | 0.98 | 0.99 |
| TPSV (ms) | 119.0+/−53.3 | 113.0+/−59.2 | −4.4+/−22.1 | −2.7+/−20.1 | 0.93 | 0.95 |
| PDV (mm/s) | 173.4+/−72.5 | 173.2+/−74.4 | −3.5+/−11.6 | 2.9+/−21.4 | 0.99 | 0.97 |
| TPDV (ms) | 516.8+/−90.8 | 536.1+/−103.4 | −0.1+/−49.3 | −20+/−70.3 | 0.95 | 0.90 |
The means of the two breath-hold values (+/−SD) are included for reference for each observer. The ICC is calculated for absolute agreement (single measure). MV mean velocity, PSV peak systolic velocity, TPSV time to peak systolic velocity, PDV diastolic peak velocity and TPDV time to diastolic peak velocity