Table 4:
Changes before vs after BCSD (n=34)
| n* | Before BCSD | After BCSD | p value-change | |
|---|---|---|---|---|
| ICD data | ||||
| AAs burden, % | 34 | 0.0 (0–0.7) | 0.0 (0–0.1) | 0.49 |
| Atrial pacing, % | 29 | 28 (9–77) | 72 (27–92) | <0.01 |
| At least one episode of AAs | 34 | 14 (41) | 12 (35) | 0.80 |
| Longest AAs ≥ 24 hours | 32 | 2 (6) | 2 (6) | 1.00 |
| AMS rate, bpm | 33 | 174 ± 15 | 171 ± 14 | 0.13 |
| Rate response function on | 33 | 11 (33) | 17 (52) | 0.21 |
| Lower rate interval, ppm | 33 | 59 ± 12 | 64 ± 11 | <0.01 |
| Right ventricular pacing (dual chamber ICD), % | 22 | 1.1 (1–6.7) | 3 (0.7–20.3) | 0.21 |
| Biventricular pacing, % | 8 | 95.5 (91.9–96.4) | 97.1 (95.7–98.3) | 0.64 |
| Echocardiographic data | ||||
| LVEF, % | 27 | 40 ±12 | 37 ± 13 | 0.17 |
| LVEDVI, ml/m2 | 21 | 72 ± 26 | 75 ± 22 | 0.49 |
| LVEDD, mm | 23 | 57 ± 8 | 60 ± 9 | <0.01 |
| LAVI, ml/m2 | 22 | 30 ± 17 | 35 ± 22 | 0.51 |
| LAVI > 34 | 22 | 8 (36) | 7 (32) | 0.75 |
| RAVI, ml/ m2 | 19 | 26 ± 10 | 34 ± 21 | 0.34 |
| RV dysfunction | 24 | 7 (29) | 7 (29) | 1.00 |
| Valvular stenosis/regurgitation ≥ moderate | 25 | 3 (12) | 7 (28) | 0.16 |
| Clinical data | ||||
| Number of sustained VT/ ICD shocks | 34 | 8 (3–15) | 1 (0–4) | <0.01 |
| NYHA class | 34 | 2.0 (2–2) | 2.1 (2–3) | 0.50 |
| Drug Index/Month | 34 | 91 (61–122) | 91 (59–122) | 0.76 |
Values are reported as mean ± SD, n (%), or median (interquartile range). AAs= atrial arrhythmias; AMS= automatic mode switch; LAVI= left atrial volume index; LVEDD= left ventricular end diastolic diameter; LVEDVI= left ventricular diastolic volume index; LVEF= left ventricular ejection fraction; RAVI= right atrial volume index; RV= right ventricle. n* = patients with paired data (before and after BCSD).