atrioventricular nodal reentrant tachycardia
noun [ U ] medical specialized uk/ˌeɪ.tri.əʊ.venˌtrɪk.jə.lə ˌnəʊ.dəl riːˌen.trənt tæk.ɪˈkɑː.di.ə/ us/ˌeɪ.tri.oʊ.venˌtrɪk.jə.lɚ ˌnoʊ.dəl riˌen.trənt tæk.ɪˈkɑːr.di.ə/ (abbreviation AVNT)
房室结折返性心动过速
an unusually fast heart rate caused by an extra electrical connection that forms through the AV node (= area of the heart that transmits electrical impulses)