Skip to Content

supranormal excitability


Definition: at the end of phase three of the cardiac action potential, the successful stimulation threshold falls below (less negative than) the level necessary to produce excitation during the rest of the phase of diastole, so that an ordinary subthreshold stimulus becomes effective.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.