tachycardia
noun
tachy·car·dia
ˌta-ki-ˈkär-dē-ə 
: relatively rapid heart action whether physiological (as after exercise) or pathological compare bradycardia
Examples of tachycardia in a Sentence
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They have also previously been diagnosed with bipolar disorder, endometriosis, Ehlers-Danlos syndrome, POTS (postural orthostatic tachycardia syndrome), Sjogren’s syndrome, and MCAS (mast cell activation syndrome).
—
Mekishana Pierre, EW.com, 23 June 2025
Sensing the problem, your heart jumps into overdrive, overcompensating by beating way too fast (which is what tachycardia means).
—Rachel Nall, SELF, 17 June 2025
Postural orthostatic tachycardia syndrome (POTS) (a condition with lightheadedness and a fast heart rate when changing to a standing position)
Types of Migraine
The two main types of migraine are:4
Migraine without aura.
—Cathy Nelson, Verywell Health, 3 June 2025
After she was diagnosed with postural orthostatic tachycardia syndrome, an autonomic nervous system disorder, Jessica Slice embraced a new identity: a person with a disability.
—Brittney Melton, NPR, 2 June 2025
See All Example Sentences for tachycardia
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Mekishana Pierre, EW.com, 23 June 2025
Sensing the problem, your heart jumps into overdrive, overcompensating by beating way too fast (which is what tachycardia means).
—Rachel Nall, SELF, 17 June 2025
Postural orthostatic tachycardia syndrome (POTS) (a condition with lightheadedness and a fast heart rate when changing to a standing position)
Types of Migraine
The two main types of migraine are:4
Migraine without aura.
—Cathy Nelson, Verywell Health, 3 June 2025
After she was diagnosed with postural orthostatic tachycardia syndrome, an autonomic nervous system disorder, Jessica Slice embraced a new identity: a person with a disability.
—Brittney Melton, NPR, 2 June 2025
See All Example Sentences for tachycardia
Cite this Entry
“Tachycardia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tachycardia. Accessed 8 Jul. 2025.
Copy CitationMedical Definition
tachycardia
noun
tachy·car·dia
ˌtak-i-ˈkärd-ē-ə
: relatively rapid heart action whether physiological (as after exercise) or pathological see junctional tachycardia, paroxysmal tachycardia, sinus tachycardia, ventricular tachycardia compare bradycardia
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