arrhythmia
noun
ar·rhyth·mia
ā-ˈrit͟h-mē-ə 
: an alteration in rhythm of the heartbeat either in time or force
Examples of arrhythmia in a Sentence
Recent Examples on the Web
However, acute blood pressure spikes are more pronounced with coffee, Routhenstein said, so those with high blood pressure or arrhythmias may benefit from green tea or decaffeinated options.
—
Sherri Gordon, Health, 4 Jan. 2026
Baby Sixx also had a rare heart arrhythmia known as Wolff-Parkinson-White syndrome, which caused his heart rate to spike to more than 200 beats per minute at times.
—Kayla Grant, PEOPLE, 2 Jan. 2026
Having too much potassium, called hyperkalemia, can increase one’s risk of dangerous heart arrhythmias, Laffin said.
—Maggie O'Neill, Verywell Health, 19 Dec. 2025
Ventricular fibrillation, also known as V-fib, is an abnormal heart rhythm (arrhythmia) that causes a person's lower heart chambers to race and affects their ability to pump blood, according to the Cleveland Clinic.
—Terry Collins, USA Today, 13 Nov. 2025
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Sherri Gordon, Health, 4 Jan. 2026
Baby Sixx also had a rare heart arrhythmia known as Wolff-Parkinson-White syndrome, which caused his heart rate to spike to more than 200 beats per minute at times.
—Kayla Grant, PEOPLE, 2 Jan. 2026
Having too much potassium, called hyperkalemia, can increase one’s risk of dangerous heart arrhythmias, Laffin said.
—Maggie O'Neill, Verywell Health, 19 Dec. 2025
Ventricular fibrillation, also known as V-fib, is an abnormal heart rhythm (arrhythmia) that causes a person's lower heart chambers to race and affects their ability to pump blood, according to the Cleveland Clinic.
—Terry Collins, USA Today, 13 Nov. 2025
See All Example Sentences for arrhythmia
Cite this Entry
“Arrhythmia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arrhythmia. Accessed 6 Jan. 2026.
Copy CitationMedical Definition
arrhythmia
noun
ar·rhyth·mia
ā-ˈrit͟h-mē-ə
: an alteration in rhythm of the heartbeat either in time or force
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