2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86598Evidence of discrete scale invariance (DSI) in daytime healthy heart rate variability (HRV) is presented based on the log-periodic power law scaling of the heart beat interval increment. Our analysis suggests multiple DSI groups and a dynamic cascading process. A cascade model is presented to simulate such a property.7 figuresData Analysis, Statistics and Probabilitytext