Table 2.
Hemodynamic, Electrocardiographic, and Laboratory Data
| All (N = 14) | SW (n = 9) | NW (n = 5) | P Value (SW vs NW) | |
|---|---|---|---|---|
| Hemodynamic data | ||||
| Systolic BP, mm Hg | 87 ± 11 | 87 ± 12 | 87 ± 9 | 0.989 |
| Diastolic BP, mm Hg | 54 ± 7 | 54 ± 9 | 53 ± 5 | 0.785 |
| Heart rate, bpm | 80 ± 8 | 82 ± 5 | 75 ± 12 | 0.168 |
| Electrocardiographic data | ||||
| Basic rhythm | 0.138 | |||
| Sinus | 9 (64) | 7 (78) | 2 (40) | |
| AF | 1 (7) | 1 (11) | 0 (0) | |
| Pacemaker | 4 (29) | 1 (11) | 3 (60) | |
| Conduction disorder | 0.209 | |||
| None (QRS <120 msec) | 3 (21) | 2 (22) | 1 (20) | |
| LBBB | 3 (21) | 3 (33) | 0 (0) | |
| RBBB | 1 (7) | 0 (0) | 1 (20) | |
| Intraventricular conduction defect | 2 (14) | 2 (22) | 0 (0) | |
| Pacing | 5 (36) | 2 (22) | 3 (60) | |
| QRS interval, msec | 159 ± 48 | 159 ± 44 | 159 ± 59 | 0.988 |
| QRS after CRT, msec | 159 ± 35 | 162 ± 28 | 154 ± 48 | 0.702 |
| Laboratory data | ||||
| BNP on admission, pg/mL | 1045 ± 858 | 885 ± 824 | 1333 ± 934 | 0.371 |
| BNP before CRT, pg/mL | 742 ± 543 | 626 ± 522 | 950 ± 575 | 0.317 |
| Hemoglobin, g/dL | 11.4 ± 1.9 | 11.3 ± 1.7 | 11.6 ± 2.4 | 0.768 |
| Sodium, mEq/L | 133 ± 5 | 133 ± 4 | 134 ± 6 | 0.553 |
| Creatinine, mg/dL | 1.4 ± 0.8 | 1.4 ± 0.9 | 1.3 ± 0.8 | 0.739 |
| Total bilirubin, mg/dL | 1.0 ± 0.9 | 0.6 ± 0.2 | 1.6 ± 1.3 | 0.015 |
| Uric acid, mg/dL | 6.2 ± 2.1 | 6.7 ± 1.7 | 5.4 ± 2.7 | 0.303 |
Abbreviations: AF, atrial fibrillation; BNP, brain natriuretic peptide; BP, blood pressure; CRT, cardiac resynchronization therapy; LBBB, left bundle branch block; NW, nonwithdrawal; RBBB, right bundle branch block; SD, standard deviation; SW, successful withdrawal. There is a discrepancy between the number of pacemaker rhythm (4) and paced QRS conduction (5) because 1 AF patient received ventricular pacing. Data are presented as mean ± SD or n (%), and were acquired preprocedurally unless otherwise indicated.