The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery

Magdi M. Saba, Jagan Akella, James Gammie, Robert Poston, Anthony Johnson, Robert E. Hood, Timm Michael Dickfeld, Stephen R. Shorofsky

Research output: Contribution to journalArticle

Abstract

AimsReference values exist for endocardial but not for epicardial (EPI) substrate mapping in cases of cardiomyopathy-associated ventricular tachycardia. We sought to establish such values for EPI electrogram voltage, including areas with overlying fat.Methods and resultsTen patients (six males) undergoing cardiac surgery were studied. After opening the pericardium, the distal bipole of an electrophysiology catheter was placed tangential to the EPI surface to obtain an electrogram recording. The bipole was tangentially rotated 90° and the higher of the two amplitudes (mV) was taken as the local amplitude. Recordings were taken from normal left and right ventricular myocardium (n = 26 data points each), over thick (≥0.5 cm) fat at both ventricular bases (n = 16) and thin (

Original languageEnglish (US)
Pages (from-to)949-953
Number of pages5
JournalEuropace
Volume11
Issue number7
DOIs
StatePublished - Jul 2009
Externally publishedYes

Keywords

  • Ablation
  • Electrogram amplitude
  • Epicardial
  • Epicardial fat
  • Ventricular tachycardia

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Fingerprint Dive into the research topics of 'The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery'. Together they form a unique fingerprint.

  • Cite this

    Saba, M. M., Akella, J., Gammie, J., Poston, R., Johnson, A., Hood, R. E., Dickfeld, T. M., & Shorofsky, S. R. (2009). The influence of fat thickness on the human epicardial bipolar electrogram characteristics: Measurements on patients undergoing open-heart surgery. Europace, 11(7), 949-953. https://doi.org/10.1093/europace/eup156