Table I.
Baseline Demographics, Device Settings, and CRT Response
| Demographics | |
|---|---|
| Pre‐CRT implantation | |
| Mean age (years) | 70 ± 7 |
| Male | 9 (100%) |
| Sinus rhythm | 6 (67%) |
| Ischemic heart disease | 7 (78%) |
| QRS duration (ms) | 152 ± 37 |
| LBBB morphology | 9 (100%) |
| NYHA class III | 7 (78%) |
| LV systolic function, EF by echo (%) | 30 ± 8 |
| RV systolic function: TAPSE (mm) | 13 ± 4 |
| RV basal diameter, diastole (mm) | 41 ± 8 |
| RV systolic function, EF by MRI (%) | 43 ± 10 |
| CRT settings | |
| Sensed AV delay (ms) | 120 ± 22 |
| Paced AV delay (ms) | 135 ± 15 |
| VV timing: LV ahead (ms) | 17 ± 13 |
| CRT response assessment at 6 months | |
| LV systolic function, EF by echo (%) | 32 ± 11 |
| RV systolic function: TAPSE (mm) | 14 ± 2 |
| RV basal diameter, diastole (mm) | 39 ± 10 |
| Echo responder | 3 (33%) |
| Clinical responder | 5 (56%) |
Averaged data are mean ± SD.
AV = atrio‐ventricular; CRT = cardiac resynchronization therapy; ECHO = echocardiography; EF = ejection fraction; LBBB = left bundle branch block; LV = left ventricular; MRI = magnetic resonance imaging; NYHA = New York Heart Association; RV = right ventricular; TAPSE = Tricuspid Annular Plane Systolic Excursion; VV = ventricular‐ventricular.