title: Frequent AV node reentrant tachycardia induced by oversized port catheter.
abstract: OBJECTIVE
  Here, we describe the efficiency of interventional electrophysiology therapy in a critically ill patient with heart failure because of incessant AV node reentrant tachycardia after surgical port implantation.
  
  
  METHODS
  Electrophysiology diagnostic and radio frequency ablation were utilized in the study.
  
  
  RESULTS
  We presented a 78-year-old patient with colorectal cancer, surgical port implantation, and progressive heart failure due to an incessant AV node reentrant tachycardia (AVNRT). This rhythm disturbance was refractory to any conventional pharmaceutical treatment. The electrophysiology diagnostic obtained an AVNRT. During fluoroscopy, an oversized port catheter with a loop touching the tricuspid valve annulus was discovered. This port catheter was responsible for premature beats, which induced incessant AVNRT. A manual reposition of the port edge and additional AV node slow pathway modification terminated further tachycardia.
  
  
  CONCLUSIONS
  Electrophysiology diagnostic and radiofrequency ablation procedures are promising techniques also in critically ill patients with hemodynamic compromising supraventricular tachycardia.
authors.affiliation: Medizinische Klinik I, Kardiologie und Angiologie, Klinikum Worms, Academic Teaching Hospital of the Johannes-Gutenberg-University, Mainz, Gabriel-von-Seidl-Str. 81, 67550, Worms, Germany. StefanAndreas.Lange@googlemail.com
authors.forename: Stefan Andreas
authors.initials: SA
authors.lastname: Lange
authors.forename: Jens
authors.initials: J
authors.lastname: Jung
mesh_terms: D000368:Aged; D017115:Catheter Ablation; D002408:Catheters, Indwelling / Q000009:adverse effects*; D015179:Colorectal Neoplasms / Q000150:complications*; D003422:Critical Care; D004594:Electrophysiology; D006801:Humans; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000209:etiology* / Q000473:pathology / Q000601:surgery