A Case of Torsades de Pointes Complicating Coronary Fractional Flow Reserve Study

A coronary fractional flow reserve (FFR) study is a functional coronary flow assessment frequently performed in a cath lab to access a hemodynamic significance of intermediate coronary lesions. During this study, intracoronary adenosine is injected to achieve a full hyperemia of the coronary bed. Several side effects of the intracoronary adenosine injections are well known, such as transient complete AV block, transient angina-like chest pain, nausea, and dyspnea. However to our best knowledge, there were no previous reports of torsades de pointes complicating the intracoronary adenosine injection.