antiarrhythmic

American  

[an-tee-uh-rith-mik, -uh-rith-, an-tahy-] / ˌæn ti əˈrɪð mɪk, -əˈrɪθ-, ˌæn taɪ- /

adjective

1. of or relating to any substance that prevents, inhibits, or alleviates heartbeat irregularities.

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noun

1. any such substance, as lidocaine.

Etymology

Origin of antiarrhythmic

First recorded in 1950–55; anti- + arrhythmic ( def. )

Example Sentences

We need to understand better what promotes arrythmia to help us develop new antiarrhythmic drugs.

From Science Daily • Oct. 13, 2025

When including patients still on antiarrhythmic drug therapy following the procedure with the ablation system, 67.4 percent had a greater than 90 percent reduction of AF burden at six months.

From Forbes • Oct. 10, 2011

Patients in the medical management arm received antiarrhythmic drug changes and direct current cardioversions to achieve and maintain sinus rhythm, and were followed at 1, 3 and 6-months.

From Forbes • Oct. 10, 2011