Fig. 7

Analysis of keywords in MI/R injury research using the CiteSpace tool. A Top 20 keywords with high frequency of co-occurrence. B Top 20 keywords with the strongest citation bursts. Year represents the time when the keyword first appears. Strength describes the extent of the cited change. Begin and end indicate the time when each burst starts and ends. The red bar shows the time when the keyword occurs frequently, and the blue bar indicates the time when the keyword occurs rarely