ischemia
noun
is·che·miai-ˈskē-mē-ə 
:deficient supply of blood to a body part (such as the heart or brain) that is due to obstruction of the inflow of arterial blood
Examples ofischemia in a Sentence
Recent Examples on the WebOur understanding of how their brains tolerate hypothermia andischemia has informed research efforts, as well as life-saving treatments, for stroke, cardiac arrest and traumatic brain injury.—
Scott Travers,Forbes.com, 24 Jan. 2026Pan explained that saving a soldier’s life often requires using a tourniquet or bandage to stop bleeding, but cutting off circulation can trigger severeischemia, or loss of blood flow.—Aamir Khollam,Interesting Engineering, 10 Nov. 2025Chronic mesentericischemiaoccurs when plaque clogs the arteries that feed the gut.—Colleen Doherty,Verywell Health, 20 July 2025The American Academy of Allergy, Asthma & Immunology notes that cardiac anaphylaxis can cause reduced blood flow to the heart (myocardialischemia) and irregular heartbeats (arrhythmias) when triggered by an allergy to insect venom.—Khloe Quill,FOXNews.com, 28 June 2025See All Example Sentences forischemia
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Scott Travers,Forbes.com, 24 Jan. 2026Pan explained that saving a soldier’s life often requires using a tourniquet or bandage to stop bleeding, but cutting off circulation can trigger severeischemia, or loss of blood flow.—Aamir Khollam,Interesting Engineering, 10 Nov. 2025Chronic mesentericischemiaoccurs when plaque clogs the arteries that feed the gut.—Colleen Doherty,Verywell Health, 20 July 2025The American Academy of Allergy, Asthma & Immunology notes that cardiac anaphylaxis can cause reduced blood flow to the heart (myocardialischemia) and irregular heartbeats (arrhythmias) when triggered by an allergy to insect venom.—Khloe Quill,FOXNews.com, 28 June 2025See All Example Sentences forischemiaWord History
Etymology
New Latinischaemia, fromischaemus styptic, from Greekischaimos, fromischein to restrain (akin to Greekechein to hold) +haima blood — more atschemeentry 1
First Known Use
1855, in the meaning definedabove
Rhymes forischemia
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Cite this Entry
“Ischemia.”Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ischemia. Accessed 16 Feb. 2026.
Copy CitationMedical Definition
ischemia
nounisch·emia
variants or chiefly Britishischaemia
:deficient supply of blood to a body part (as the heart or brain) that is due to obstruction of the inflow of arterial blood (as by the narrowing of arteries by spasm or disease)
More from Merriam-Webster onischemia
Britannica.com:Encyclopedia article aboutischemia
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