supraventricular
adjective
sup·ra·ven·tric·u·lar
ˌsü-prə-ven-ˈtri-kyə-lər
-vən-,
-ˌprä-
: relating to or being a rhythmic abnormality of the heart caused by impulses originating above the ventricles
supraventricular tachycardia
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Merriam-Webster unabridged
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