Table 2.
Patient characteristics based on baseline left ventricular ejection fraction
| LVEF ≥50% (n=109) |
LVEF <50% (n=114) |
|||||
|---|---|---|---|---|---|---|
| CSP (n = 63) | CP (n = 46) | P value | CSP (n = 47) | CP (n = 67) | P value | |
| Type of pacing | HBP 51 (81%) LBBAP 12(19%) |
RVP 40 (87%) BVP 6 (13%) |
HBP 33(70%) LBBAP 14 (30%) |
BVP 51 (76%) RVP 16 (24%) |
||
| Age (y) | 76 ± 10 | 78 ± 8 | .13 | 73 ± 10 | 72 ± 10 | .50 |
| BMI | 29.7 ± 8 | 28.7 ± 6.2 | .51 | 28 ± 6 | 30 ± 7 | .08 |
| Male sex | 46 (73%) | 32 (67%) | .69 | 32 (68%) | 45 (67%) | .91 |
| CAD | 26 (41%) | 15 (32%) | .35 | 22 (47%) | 30 (45%) | .89 |
| DM | 19 (30%) | 10 (22%) | .32 | 12 (26%) | 17 (26%) | .94 |
| HTN | 50 (79%) | 31 (67%) | .16 | 36 (77%) | 50 (76%) | .92 |
| AF type | .74 | .55 | ||||
| Paroxysmal | 15 (24%) | 14 (30%) | 6 (13%) | 13 (19%) | ||
| Persistent | 39 (62%) | 26 (57%) | 31 (66%) | 38 (57%) | ||
| Permanent | 9 (14%) | 6 (13%) | 10 (21%) | 16 (24%) | ||
| Baseline EF (%) | 57 ± 4 | 56 ± 5.2 | .30 | 35 ± 9 | 28 ± 10 | <.01 |
| Baseline QRS duration (ms) | 97 ± 24 | 103 ± 26 | .23 | 109 ± 24 | 130 ± 31 | <.01 |
| Baseline QRS morphology | ||||||
| Normal QRS | 49 (78%) | 30 (65%) | .15 | 25 (53%) | 19 (28%) | <.01 |
| RBBB | 9 (14%) | 4 (9%) | .37 | 3 (6%) | 9 (13%) | .22 |
| LBBB | 3 (5%) | 5 (11%) | .23 | 8 (17%) | 32 (48%) | <.01 |
| IVCD | 1 (2%) | 6 (13%) | .02 | 11 (23%) | 6 (9%) | .03 |
| Medications | ||||||
| Beta blockers | 59 (94%) | 35 (76%) | <.01 | 44 (94%) | 62 (93%) | .82 |
| Calcium channel blockers | 9 (14%) | 13 (28%) | .07 | 6 (13%) | 7 (11%) | .70 |
| Digoxin | 13 (21%) | 6 (13%) | .3 | 13 (28%) | 23 (34%) | .39 |
| Antiarrhythmic agents | 46 (73%) | 33 (71%) | .88 | 30 (64%) | 38 (57%) | .45 |
| ARB/ACEI/ARNI | 30 (48%) | 18 (39%) | .38 | 26 (57%) | 48 (71%) | .29 |
BVP = biventricular pacing; HBP = His bundle pacing; LBBAP = left bundle branch area pacing; RVP = right ventricular pacing; other abbreviations as in Table 1.