Current bioprinted hearts reproduce only the physical form — they do not conduct electricity, self-generate power, or contract autonomously. This invention disclosure proposes the Conductive Piezoelectric Myofiber Bioprinted Heart (CPMH), a design concept in which a single fiber integrates three functions: (1) Conductivity — carbon nanotube/graphene composite bioink enables electrical signal propagation across the entire fiber network; (2) Piezoelectricity — PVDF-based biocompatible polymer generates electricity from mechanical contraction, enabling self-powered operation; (3) Muscle contraction — actin/myosin-analog artificial muscle proteins contract upon electrical stimulation, creating a self-sustaining beat cycle: contraction generates electricity, electricity drives contraction. The heart is printed in a helical fiber orientation replicating native myocardial architecture, with three functional layers: endocardial (high-speed signal conduction), myocardial (power generation + contraction), and epicardial (whole-body repair current transmission). CPMH serves as the physical implementation material for the previously disclosed Electromagnetic Circulatory Cardiac Engine (ECCE, DOI: 10.5281/zenodo.20725907). Together, ECCE and CPMH form a paired invention for a non-stopping electromagnetic artificial heart. Theoretical basis: V = N / D (Tendo Economics, Katayama Yoshimitsu, 2026). Inventor declaration: The inventor does not manufacture this device. This disclosure is published as an open knowledge base for all developers, materials scientists, bioprinting researchers, and cardiac surgeons.
Yoshimitsu Katayama (Wed,) studied this question.