Use of microelectrode near-field signals to determine catheter contact.

ABSTRACT:

Background

The utility of standard distal bipolar electrograms (sEGMs) for assessing catheter-tissue contact may be obscured by the presence of far-field signals. Microelectrode electrograms (mEGMs) may overcome this limitation.

Methods

We compared 5 mEGM characteristics (amplitude, frequency content, temporal signal variability, presence of injury current, and amplitude differential between bipoles) with the sEGM for determining tissue contact in 20 patients undergoing ablation of typical atrial flutter. Visualization of catheter-tissue contact by intracardiac echocardiography (ICE) served as the gold standard for assessing contact. Correlation between electrograms and ICE-verified contact level was reported as percent concordance.

Results

Three of 5 mEGM characteris

SUBMITTER: Levy MR 

PROVIDER: S-EPMC5828270 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature