Table 2. Hemodynamic determinations.
| Variables | Overall (N=195) | 1 PAWP attempt (N=139) | 2 PAWP attempts (N=39) | ≥3 PAWP attempts (N=17) | P (ANOVA, Kruskal-Wallis, Chi-square test) |
|---|---|---|---|---|---|
| Physician performing the procedure | 0.53 | ||||
| #1 | 143 [73] | 105 [73] | 28 [20] | 10 [7] | |
| #2 | 30 [15] | 19 [63] | 6 [20] | 5 [17] | |
| #3 | 22 [11] | 15 [68] | 5 [23] | 2 [9] | |
| PAC used | 0.10 | ||||
| Edwards 7F | 124 [64] | 84 [60] | 27 [69] | 13 [76] | |
| Edwards Paceport 7.5F | 59 [30] | 49 [35] | 8 [21] | 2 [12] | |
| Edwards synthetic ControlCath 7F | 12 [6] | 6 [4] | 4 [10] | 2 [12] | |
| Initial PAC distance from hub (cm) (N=65*) | 52.3±4.6 | 51.9±4.4 | 54.8±4.8 | 52.5±6.4 | 0.27 |
| Final PAC distance from hub (cm) (N=65*) | 52.6±5.2 | 51.9±4.4 | 56.9±4.9 | 52.8±10.0 | 0.04 |
| Initial location of the PAC | 0.82 | ||||
| Right PA | 184 [94] | 132 [95] | 36 [92] | 16 [94] | |
| Left PA | 11 [6] | 7 [5] | 3 [8] | 1 [6] | |
| Final location of the PAC | <0.001 | ||||
| Right PA | 168 [86] | 132 [95] | 31 [80] | 5 [29] | |
| Left PA | 27 [14] | 7 [5] | 8 [21] | 12 [71] | |
| Initial location of the PAC | <0.001 | ||||
| Lower third of the lung | 136 [70] | 93 [67] | 27 [69] | 16 [94] | |
| Middle third of the lung | 52 [27] | 45 [32] | 7 [18] | 0 [0] | |
| Upper third of the lung | 7 [4] | 1 [1] | 5 [13] | 1 [6] | |
| Final location of the PAC | 0.30 | ||||
| Lower third of the lung | 134 [69] | 93 [57] | 30 [77] | 11 [65] | |
| Middle third of the lung | 58 [30] | 45 [32] | 8 [21] | 5 [29] | |
| Upper third of the lung | 3 [2] | 1 [1] | 1 [3] | 1 [6] | |
| Initial PAC balloon volume (mL) | 1.1±0.3 | 1.0±0.3 | 1.1±0.4 | 1.2±0.3 | 0.02 |
| Final PAC balloon volume (mL) | 1.0±0.3 | 1.0±0.3 | 1.0±0.3 | 1.2±0.4 | 0.14 |
| Atrial fibrillation at RHC (yes) | 8 [4] | 6 [4] | 2 [5] | 0 [0] | 0.66 |
| RAP (mmHg) | 11.2±5.5 | 10.6±4.8 | 12.6±7.5 | 12.7±4.9 | 0.07 |
| mPAP (mmHg) | 34.4±15.9 | 32.9±15.2 | 36.2±17.1 | 43.0±16.9 | 0.03 |
| PAWP (mmHg) | 16.4±5.9 | 15.7±5.2 | 17.1±7.1 | 20.4±6.2 | 0.005 |
| CI (L/min/m2) | 3.1±0.8 | 3.0±0.8 | 3.2±1.0 | 3.0±1.1 | 0.68 |
| PVR (WU) | 2.7 [1.5–4.6] | 2.6 [1.4–4.4] | 2.7 [1.7–6.1] | 3.6 [2.3–6.0] | 0.33 |
| Pulmonary hemodynamic classification | 0.08 | ||||
| No PH | 39 [20] | 34 [25] | 4 [10] | 1 [6] | |
| Pre-capillary PH | 55 [28] | 39 [28] | 13 [33] | 3 [18] | |
| Isolated post-capillary PH | 24 [12] | 16 [12] | 6 [15] | 2 [12] | |
| Combined pre- and post-capillary PH | 64 [33] | 41 [30] | 12 [31] | 11 [65] | |
| Unclassified PH | 13 [7] | 9 [7] | 4 [10] | 0 [0] | |
| Wedge blood obtained (yes) | 141 [72] | 100 [72] | 29 [74] | 12 [71] | 0.94 |
| SwO2 (N=141)* | 97 [95–99] | 97 [95–98] | 98 [96–99] | 97 [93–99] | 0.40 |
Data are presented as mean ± SD, median [IQR] or n [%]. *, only variables with n <195. PAC, pulmonary artery catheter; PA, pulmonary artery; RAP, right atrial pressure; mPAP, mean pulmonary artery pressure; PAWP, pulmonary artery wedge pressure; CI, cardiac index; PVR, pulmonary vascular resistance; WU, Wood units; PH, pulmonary hypertension, SwO2, oxygen saturation in wedge blood; SD, standard deviation; IQR, interquartile range.