The landscape of experimental cardiac arrest research models in rats: a bibliometric analysis of the 100 most cited articles

Figures

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  Fig. 1.. Bubble plot of the top-cited studies in the field. Each study is represented by a bubble. The size of each bubble is proportional to the study's citations per year (CPY), providing a sense of the ongoing impact each study has had in terms of yearly citations. The studies are categorized into four distinct groups based on whether they exceed the 75th percentile in total citations (TC) or CPY: light grey circles represent studies that exceed the 75th percentile in TC but not in CPY (labels 1–10); dark grey circles represent studies that exceed the 75th percentile in CPY (labels 11–20); black circles represent studies that are above the 75th percentile in both TC and CPY (labels 21–35); and white circles with black outlines represent studies that fall below the 75th percentile for both metrics (no labels). Each bubble is annotated with a number label to provide a reference for the corresponding study, listed in Supplementary Table 2. This visualization offers a clear view of how individual studies have performed over time.

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  Fig. 2.. Most relevant countries based on the authors of studies about experimental cardiac arrest in rats. The map displays the most relevant countries when considering all contributing authors of the included studies, as indicated by the accompanying table. Darker shades of blue on the map represent countries with a higher frequency of publications.

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  Fig. 3.. The most frequently used author keywords in studies about experimental cardiac arrest in rats. The treemap visualizes the frequency of author keywords used in the included publications. Each rectangle represents a keyword, and the size of the rectangle is proportional to the frequency of its use. The percentage value indicates the relative frequency of each keyword compared with the total. The most frequently used keyword is "cerebral ischemia," accounting for 26% of the keywords, followed by "hypothermia" at 9%.

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  Fig. 4.. Co-occurrence network analysis using author keywords from studies about experimental cardiac arrest in rats. The network map visualizes the co-occurrence of author keywords. Keywords that frequently appear together are clustered and color-coded based on thematic areas. The size of each keyword indicates its frequency, with larger nodes representing more frequently used keywords. The primary clusters identified are “cerebral ischemia and related outcomes,” “heart,” “liver,” “blood brain barrier,” and “brain imaging metrics.” The connections between keywords illustrate their co-occurrence in the literature, highlighting the relationships among different research topics.

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  Fig. 5.. The thematic evolution map for studies about experimental cardiac arrest in rats shows the progression and development of research themes during three time periods: 1980–1996, 1997–2005, and 2006–2020. The width of the lines connecting themes across different periods represents the strength and continuity of the research themes.

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  Fig. 6.. International collaboration networks in studies about experimental cardiac arrest in rats. The map visualizes the collaborations with connecting lines between countries. Darker shades of blue on the map indicate countries with more frequent collaborations. Lines connecting the countries represent collaboration pathways, with the thickness indicating the frequency of collaboration.