Follow up
Median follow-up was 478 days (IQR 225-567). All patients showed stable
electrical parameters at last follow-up. The ventricular pacing
threshold remained stable from implant (0.85±0.61V) to last follow-up
(0.99±0.68 V, p=0.38) with a maximum increase of 0.75V in patient #4.
No complications were registered during the follow-up. Systemic
ventricle systolic function showed a significant improvement in patients
with a systemic LV (n=16 patients)(LV ejection fraction assessed by
biplane Simpson’s method: 51±16% at baseline vs. 55±17 at last
follow-up, p=0.031), and also in patients with a systemic right
ventricle (n=6 patients)(fractional area change: 39±13% at baseline vs.
43±15% at last follow-up, p=0.021) (Figure 4). NYHA class significantly
improved during follow-up from 1.50±0.51 to 1.10±0.31 (p=0.008). Nine
patients had symptomatic heart failure at baseline (NYHA class II) and
improved to NYHA class I at last follow-up.