Failure to Deliver Therapy by a Riata Lead with Internal Wire Externalization and Normal Electrical Parameters During Routine Interrogation
Article first published online: 21 MAY 2012
© 2012 Wiley Periodicals, Inc.
Journal of Cardiovascular Electrophysiology
Volume 24, Issue 1, pages 94–96, January 2013
How to Cite
SHAH, P., SINGH, G., CHANDRA, S. and SCHUGER, C. D. (2013), Failure to Deliver Therapy by a Riata Lead with Internal Wire Externalization and Normal Electrical Parameters During Routine Interrogation. Journal of Cardiovascular Electrophysiology, 24: 94–96. doi: 10.1111/j.1540-8167.2012.02361.x
- Issue published online: 2 JAN 2013
- Article first published online: 21 MAY 2012
- Manuscript received 11 March 2012; Revised manuscript received 27 March 2012; Accepted for publication 9 April 2012.
- lead malfunction;
- Riata lead;
- sudden death;
- ventricular tachycardia
Failure to Deliver Therapy by a Riata Lead. We present a case of failure to deliver a shock by a St. Jude Medical defibrillator involving a Riata lead that was discovered incidentally while the device was attempting to deliver inappropriate therapy. Routine interrogation, including high voltage (HV) impedance, failed to reveal any abnormality. Failure to deliver therapy was confirmed during DFT testing, which revealed extremely low HV impedance only while attempting to deliver therapy. Fluoroscopy indicated moderate externalization of internal wires. This case highlights an under-recognized issue with St. Jude Medical systems, namely the possibility that therapy may not be delivered despite the presence of normal electrical parameters during routine surveillance. (J Cardiovasc Electrophysiol, Vol. 24, pp. 94-96, January 2013)