An organic artificial cardiomyocyte

Area of Science:

• Biophysics
• Materials Science
• Cardiovascular Research

Background:

• Understanding biological excitability is crucial for modeling action potentials.
• Neuromorphic hardware has advanced, but cardiac-specific hardware (cardiomorphic) is underdeveloped.
• Challenges include replicating complex cardiac ionic dynamics and temporal mismatches in existing electronics.

Purpose of the Study:

• To develop a hardware emulation of cardiac action potential generation and propagation.
• To address the limitations of current cardiomorphic hardware by aligning time constants with cardiac processes.
• To create a biorealistic hardware model for cardiac electrophysiology.

Main Methods:

• Introduction of an organic electrochemical cardiomyocyte (OECM).
• Replication of key cardiac ionic currents: fast sodium, slow calcium, and potassium currents.
• Alignment of ion-mediated channel current time constants with ventricular processes.

Main Results:

• The OECM successfully generates ventricular-like action potentials with realistic phases.
• Demonstrated refractoriness and responsiveness to electrical and chemical stimuli.
• Achieved synchronization with bioelectric signals from living cardiomyocytes.

Conclusions:

• The OECM represents a significant advancement in biorealistic hardware emulation of cardiac function.
• This technology shifts cardiac modeling paradigms from purely computational to hardware-based approaches.
• OECMs offer a new platform for studying cardiac electrophysiology and developing related technologies.