Editing Cardiac action potential (section)

=== Cardiac automaticity ===
'''Cardiac automaticity''' also known as '''autorhythmicity''', is the property of the specialized [[Electrical conduction system of the heart|conductive]] [[cardiomyocytes|muscle cells]] of the heart to generate spontaneous cardiac action potentials.<ref>{{Cite book |title=Clinical arrhythmology and electrophysiology: a companion to Braunwald's heart disease |vauthors=Issa ZF, Miller JM, Zipes DP |date=2019 |publisher=Elsevier |isbn=978-0-323-52356-1 |veditors=Issa ZF |edition=Third |location=Philadelphia, PA |pages=51–80 |chapter=Electrophysiological Mechanisms of Cardiac Arrhythmias: Abnormal Automaticity |doi=10.1016/B978-0-323-52356-1.00003-7}}</ref><ref>{{Cite journal |vauthors=Antzelevitch C, Burashnikov A |date=March 2011 |title=Overview of Basic Mechanisms of Cardiac Arrhythmia |journal=Cardiac Electrophysiology Clinics |volume=3 |issue=1 |pages=23–45 |doi=10.1016/j.ccep.2010.10.012 |pmc=3164530 |pmid=21892379}}</ref> Automaticity can be normal or abnormal, caused by temporary [[ion channel]] characteristic changes such as certain medication usage, or in the case of abnormal automaticity the changes are in [[Electrotonic potential|electrotonic environment]], caused, for example, by [[myocardial infarction]].<ref>{{Cite web |title=Cardiac Arrhythmias - Textbook of Cardiology |url=https://www.textbookofcardiology.org/wiki/Cardiac_Arrhythmias |access-date=2022-05-17 |website=www.textbookofcardiology.org |vauthors=Krul S}}</ref>