Fig. 1

Modified PRISMA 2009 flow diagram. Systematic literature search and selection process overview. Given that the goal of this literature review was to give an insight into the different terminologies and definitions of B waves, only articles specifically mentioning B waves or related terms were included in the study selection. As an example: slow waves of ABP was not included. Papers simultaneously published by different journals were considered as duplicates and also excluded. The remaining articles (n = 124) were thoroughly examined and included in this study following the PRISMA flow-diagram. Terminologies, definitions, and methods were identified individually by two independent reviewers and categorized according to a predefined protocol. Disagreements were resolved by consensus. No importance was given to the order of words, ICP B waves was treated equally to B ICP waves. Hyphens were removed, B-waves were grouped together with B waves. Of and in were disregarded, slow waves of ICP were registered as slow waves ICP. Only terminologies associated with ICP B waves were included (i.e. slow waves of ABP was not included). Terminologies in singular form were registered as plural, B wave was registered as B waves. Terms used less than three times were categorized as other