DP and SC contributed to the set-up, planning, and conduction of data collection and commented on the manuscript.
Mette Soerensen participated in generating the conception of the study and the study design, acquisition of data, conduction of data analysis, interpretation of data, and drafting the manuscript.
Despite the theoretical drawbacks of fusion (potential for loosing optimal fusion because of disease progression or spontaneous variation in AV conduction, lack of data on long-term effects of fusion CRT), in this study CRT with fusion produced an impressive rate of 100% structural responders at 6 months.
PK was also involved in conceptualization and study design, literature review, conduction of interviews, data analysis and helped with manuscript drafting.
AG was the principle investigator, was involved with conceptualization and study design, literature review, creating connections with key informants, conduction of interviews, data analysis, manuscript drafting.
Both authors of this manuscript contributed significantly and equally to this study, including study design, survey development, conduction of surveys, data gathering and analysis, and formal writing of this manuscript.
However, due to presumed variability in AV conduction and lack of data on chronic effects of fusion, the majority of authors try to avoid it and prefer biventricular (Biv) pacing with the shortest possible AV delay, as determined by echocardiography.
The conduction of the register including data collection, data analysis and data publication has been approved by the federal committee of experts on professional secret in medical research ("Eidgenoessische Expertenkommission fuer das Berufsgeheimnis in der medizinischen Forschung").
Isabella Paul: Conceptualisation and conduction of the study, data analysis, writing of the manuscript.
RMM developed study design, supervised conduction of study, performed data management, and edited the manuscript.
SF conceived the project, contributed to experimental design and conduction of experiments, analysed data and drafted the manuscript.
