Resumen: In this study, we teased out the dynamical mechanisms underlying the generation of arrhythmogenic early afterdepolarizations (EADs) in a three-variable model of a mammalian ventricular cell. Based on recently published studies, we consider a 1-fast, 2-slow variable decomposition of the system describing the cellular action potential. We use sweeping techniques, such as the spike-counting method, and bifurcation and continuation methods to identify parametric regions with EADs. We show the existence of isolas of periodic orbits organizing the different EAD patterns and we provide a preliminary classification of our fast-slow decomposition according to the involved dynamical phenomena. This investigation represents a basis for further studies into the organization of EAD patterns in the parameter space and the involved bifurcations. Idioma: Inglés DOI: 10.3390/math8060880 Año: 2020 Publicado en: Mathematics 8, 6 (2020), 880 [17 pp] ISSN: 2227-7390 Factor impacto JCR: 2.258 (2020) Categ. JCR: MATHEMATICS rank: 24 / 330 = 0.073 (2020) - Q1 - T1 Factor impacto SCIMAGO: 0.495 - Mathematics (miscellaneous) (Q2)