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Cardiac Action Potential

Cardiac Action Potential

Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials

Action Potentials

Action Potentials

Electrophysiology of Normal Cardiac Rhythm

Electrophysiology of Normal Cardiac Rhythm

The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...

Electrocardiogram

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...

Electrocardiogram Fundamentals

Electrocardiogram Fundamentals

Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...

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Related Experiment Video

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Human iPSC-Derived Cardiomyocyte Networks on Multiwell Micro-electrode Arrays for Recurrent Action Potential Recordings

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ActionPytential: An open source tool for analyzing and visualizing cardiac action potential data.

Tamás Árpádffy-Lovas¹, Norbert Nagy^1,2

¹Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Szeged, Hungary.

|March 27, 2023

Summary

This summary is machine-generated.

A new software, ActionPytential, automates cardiac action potential analysis from various preparations and methods. It calculates 34 parameters, including novel ones, improving efficiency and accuracy for researchers.

Keywords:

Action potential Action potential duration Arrhythmia Automation Cardiac Gap-free acquisition Segmentation

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Area of Science:

Cardiovascular Electrophysiology
Computational Biology
Biomedical Signal Processing

Background:

Cardiac action potentials are fundamental to heart function, studied using diverse preparations and techniques.
Existing software often requires manual segmentation of continuous recordings, limiting efficiency.
A need exists for automated, versatile software for cardiac action potential analysis.

Purpose of the Study:

To introduce ActionPytential, a novel software tool for comprehensive cardiac action potential analysis.
To provide an automated solution for segmenting and analyzing action potentials from various sources.
To offer advanced features for detailed electrophysiological parameter extraction.

Main Methods:

Development of ActionPytential software with a user-friendly graphical interface.
Implementation of automated segmentation for gap-free recordings (slow-response and paced).
Calculation of 34 electrophysiological parameters, including novel metrics for specific morphologies.

Main Results:

Validated calculation of 34 parameters (e.g., amplitude,dV/dt max, APD) on 1200 action potentials across species.
Successful automated analysis of continuous recordings, reducing manual effort.
Introduction of new parameters for spike-and-dome morphology analysis (notch position/depth).

Conclusions:

ActionPytential offers a robust, automated solution for cardiac action potential analysis.
The software enhances research efficiency and provides novel analytical capabilities.
ActionPytential supports diverse preparations, acquisition methods, and is cross-platform compatible.