plural of macroreentry, referring to types or instances thereof.
2015, Ammar S, Luik A, Hessling G, Bruhm A, Reents T, Semmler V, Buiatti A, Kathan S, Hofmann M, Kolb C, Schmitt C, Deisenhofer I, “Ablation of perimitral flutter: acute and long-term success of the modified anterior line”, in Europace, volume 17, number 3, →DOI, →PMID, pages 447–452:
Macroreentries around the mitral annulus are a frequent left AT mechanism.