1 Introduction
2 Patients and methods
2.1 Instrumentation
2.2 Stroke volume by aortic pressure curve analysis
2.3 Stroke volume during left ventricular volume changes
2.4 Measurement protocol
2.5 Calculations and statistics
3 Results
No | Gender | Age | Height | Weight | HR | EFc | SVes | Pao,sys | Pao,dias | Remarks |
---|---|---|---|---|---|---|---|---|---|---|
Years | cm | kg | min−1 | % | ml | mmHg | mmHg | |||
1 | m | 63 | 165 | 63 | 82 | 31 | 41 | 80 | 48 | CABG and LV aneurysmectomy |
2 | f | 58 | 161 | 73 | 102 | 31 | 57 | 87 | 61 | CABG recordings after mitral valve repair |
3 | f | 66 | 165 | 73 | 107 | 28 | 53 | 94 | 58 | CABG and LV aneurysmectomy |
4 | m | 62 | 175 | 76 | 97 | 32 | 61 | 97 | 59 | CABG and BiV pacing |
5 | m | 73 | 175 | 75 | 82 | 32 | 69 | 129 | 65 | LV aneurysmectomy |
6 | m | 67 | 168 | 65 | 78 | 25 | 40 | 95 | 63 | CABG: small MV regurgitation observable |
7 | m | 70 | 160 | 66 | 85 | 39 | 61 | 123 | 55 | CABG and LV aneurysmectomy |
8 | m | 64 | 165 | 65 | 46 | 32 | 69 | 89 | 49 | LV aneurysmectomy |
9 | m | 57 | 175 | 80 | 94 | 21 | 59 | 116 | 65 | CABG and dilated cardiomyopathy |
10 | m | 62 | 178 | 77 | 97 | 23 | 43 | 118 | 73 | LV aneurysmectomy |
11 | m | 74 | 174 | 82 | 67 | 33 | 61 | 85 | 55 | LV aneurysmectomy |
12 | m | 64 | 170 | 69 | 83 | 25 | 48 | 99 | 42 | CABG and dilated cardiomyopathy |
Mean | 65.0 | 169.3 | 72.0 | 85.0 | 29.3 | 55.2 | 101.0 | 57.7 | ||
SD | 5.3 | 6.1 | 6.3 | 16.7 | 5.1 | 10.1 | 16.3 | 8.6 |
3.1 Regression analysis
3.2 Agreement between SVconductance and WKflow method
n | n pairs | Mean | Difference between methods | Limits of agreement | Calculated precision SVwf | |||||
---|---|---|---|---|---|---|---|---|---|---|
Bias | SD | Lower | Upper | SVlv = 5% | SVlv = 10% | |||||
ml | ml | ml | % | ml | ml | % | % | |||
IABP 1:2 | 10 | 112 | 35.57 | 1.04 | 3.99 | 10.9 | − 6.94 | 9.02 | 9.7 | 4.3 |
IABP 1:2,cal | 10 | 112 | 37.02 | 0.14 | 3.07 | 8.3 | − 6.00 | 6.28 | 6.6 | 0.0 |
No IABP | 7 | 87 | 35.95 | 0.48 | 4.36 | 12.1 | − 8.24 | 9.20 | 11.0 | 6.8 |
No IABP,cal | 7 | 87 | 35.92 | 0.01 | 2.71 | 7.5 | − 5.41 | 5.43 | 5.6 | 0.0 |
All | 17 | 199 | 36.32 | 0.40 | 4.21 | 11.6 | − 8.02 | 8.82 | 10.5 | 5.9 |
All, cal | 17 | 199 | 36.45 | 0.13 | 2.83 | 7.8 | − 5.53 | 5.79 | 6.0 | 0.0 |