© 2005 The European Society of Cardiology. Published by Elsevier Ltd. All rights reserved.
CP09: BIFOCAL PACING IN CLASS III CHF PATIENTS IS SUCCESFUL. INTERIM REPORT ON THE ONGOING BRIGHT STUDY
*Zaansch Medisch Centrum De Heel, Zaandam; Waterland Hospital Purmerend, NL
Bifocal right (BRIGHT) pacing is an alternative of biventricular pacing in CRT. The BRIGHT study is ongoing randomized cross-over CRT pacing study in class III CHF pts: simultaneous pacing of the apex and the outflow tract. Forty pts are enrolled in this study. Pts characteristics are: age 69±9 years, 11 female, NYHA class 3,0±0,3; EF 24±6% and QRS-width179±19 ms.
METHODS: Minnesota quality of life score, LV ejection fraction (EF), 6-minute walk test and NYHA class were major endpoints, measured before randomisation and after 3 months of back up pacing (VVI 40 bpm at RV Apex) or BRIGHT pacing. 26 pts with a minimum follow up of 7 months were analysed. 7 pts are excluded from analysis: 4 due to early death (before or just after randomisation), and 3 pts had procedure related problems.
RESULTS: Functional Class improved during BRIGHT pacing to 2,4±0,6 vs 2,8±0,7 control treatment (p < 0,03). The quality of life score tended to improve by lowering from 32 ± 19 to 23 ± 19 (p < 0,02) during BRIGHT pacing, while it did not change in the control 33 ± 22 points. The EF was before randomisation 29±11% and was higher: 36±12 % after BRIGHT pacing vs control treatment: 24±12% (p= 0,0007). The grading of the mitral insufficiency was similar during BRIGHT vs. control back up pacing: 1,7 ± 0,9 vs. 1,7 ± 0,9 (p =NS) The 6-min. walk test was a increased after BRIGHT pacing vs. the control group: 476 ± 99 m vs. 412 ± 132 m (p = 0.07). Five pts could not tolerate control pacing after the BRIGHT pacing.
CONCLUSION: In this small group of pts benefits are clear in favour of BRIGHT pacing: a few pts could not tolerate spontaneous conduction after a period of BRIGHT pacing. Furthermore improvement was seen in EF, quality of life scores and functional class. Bifocal right ventricular pacing is a good alternative for standard CRT pacing in patients with severe CHF.