Identification of pacing site

US8620432B2 · kind B2 · utility

Assignee

• ST. JUDE MEDICAL AB · SE

Inventors

• Sven-Erik Hedberg · Kungsängen, SE
• Nils Holmstrom · Järfälla, SE
• John Gustafsson · Stuvsta-Snättringe, SE
• Andreas Blomqvist · Stockholm, SE
• Andreas Karlsson · Karlskrona, SE

Key dates

• Filing date: Jun 29, 2011
• Grant date: Dec 31, 2013
• Expiry date: Jun 29, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/36521
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An implantable medical device applies an electric signal over two electrodes and measures the resulting electric signal over a candidate pair of neighboring electrodes on a lead for a first heart ventricle or over a candidate electrode of the lead and a case electrode. An impedance signal is determined for each candidate pair or electrode based on the applied signal and the measured resulting signal. A time difference between start of contraction in a second ventricle and the timing of local myocardial contraction as identified from the impedance signal at the site of the candidate pair or electrode is determined for each candidate pair or electrode. An optimal pacing electrode is selected to correspond to one of the electrodes of the candidate pair having the largest time difference or the candidate electrode having largest time difference.