arrhythmogenic

adjective

ar·​rhyth·​mo·​gen·​ic (ˈ)ā-ˌrit͟h-mə-ˈje-nik, (ˈ)a- also -ˌrith- 

: producing or tending to produce cardiac arrhythmia

Digoxin should be used with caution, since it is potentially arrhythmogenic, particularly in patients with amyloidosis.

—Sudhir S. Kushwaha et al., The New England Journal of Medicine