Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2018 Sep 19;9:1306. doi: 10.3389/fphys.2018.01306

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2018 Tomek, Tomková, Zhou, Bub and Rodriguez.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

An overview of key variables during alternans in the HeRd model. Two action potentials after reaching the stable state are shown, starting with a prolonged action potential (A) with underlying large calcium transient (B). (C) The relationship between free JSR calcium and peak J_rel. (D) Free JSR calcium and NSR calcium. Fluxes associated with SR shown are J_rel (E), J_tr (F), and J_up (G). The free Ca²⁺_[JSR] levels x₁, x₂ and peak release values y₁, y₂ are linked with load–release relationship.