plural of macroreentry, referring to types or instances thereof.
2015, “Ablation of perimitral flutter: acute and long-term success of the modified anterior line”, in Europace, volume 17, number 3, DOI:10.1093/europace/euu297, PMID25564547, pages 447-452:
Macroreentries around the mitral annulus are a frequent left AT mechanism.