cardiac muscle

noun

Definition of cardiac muscle

: the principal involuntary-muscle tissue of the vertebrate heart made up of striated fibers joined at usually branched ends and functioning in synchronized rhythmic contraction

Examples of cardiac muscle in a Sentence

Recent Examples on the Web Coronavirus has previously been found to invade heart tissue because cardiac muscle cells are rich in ACE2 receptors -- a molecular doorway used by the coronavirus, according to the American Heart Association. Michael Nedelman And Mark Lieber, CNN, "Right ventricle enlargement a major predictor for mortality among COVID patients, new study finds," 18 May 2020 Thinking in a New Way A normal heart beats when its organic pacemaker sends out regular, timed electrical signals through the cardiac muscle. Lisa Sanders, New York Times, "Why Did the Young Mother Have Searing Head Pain and a Racing Heart?," 30 Oct. 2019 By encouraging growth of new muscle, the treatment, called VentriGel, is intended to reduce scar formation and increase cardiac muscle. San Diego Union-Tribune, "Heart attack treatment gel shows safety in early human study," 16 Sep. 2019 The transplant surgeons had clipped some pieces of Astrea’s cardiac muscle. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 In the heart, this causes cardiac muscle cells to contract with more force than necessary, for instance. Beth Mole, Ars Technica, "Poison arrows inspire new male contraceptive, scientists report," 21 Jan. 2018 The transplant surgeons had clipped some pieces of Astrea’s cardiac muscle. New York Times, "Every Cell in Your Body Has the Same DNA. Except It Doesn’t.," 21 May 2018 In the heart, this causes cardiac muscle cells to contract with more force than necessary, for instance. Beth Mole, Ars Technica, "Poison arrows inspire new male contraceptive, scientists report," 21 Jan. 2018 Weird, deadly electrical rhythms arose out of his dying cardiac muscles, like ripples on a stagnating pond, necessitating defibrillating shocks to reset his rhythm. Siddhartha Mukherjee, New York Times, "The Rules of the Doctor’s Heart," 24 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cardiac muscle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cardiac muscle

circa 1881, in the meaning defined above

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Time Traveler for cardiac muscle

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The first known use of cardiac muscle was circa 1881

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Statistics for cardiac muscle

Last Updated

31 May 2020

Cite this Entry

“Cardiac muscle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cardiac%20muscle. Accessed 3 Jul. 2020.

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More Definitions for cardiac muscle

cardiac muscle

noun

Medical Definition of cardiac muscle

: the principal muscle tissue of the vertebrate heart that is made up of elongated striated muscle fibers each of which consists of a single cell that has an intrinsic rhythm of contraction and relaxation even when isolated, is joined physically at its often branched ends to other such cells by intercalated disks, and in intact myocardial tissue is synchronized to function in contraction especially by electrical signals of extrinsic origin passing through gap junctions in the intercalated disks — compare smooth muscle, striated muscle

More from Merriam-Webster on cardiac muscle

Britannica.com: Encyclopedia article about cardiac muscle

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