The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2015
Filed:
Feb. 20, 2012
John E. Burnes, Andover, MN (US);
Yong K. Cho, Maple Grove, MN (US);
David Igel, Lino Lakes, MN (US);
Luc R. Mongeon, Minneapolis, MN (US);
John C. Rueter, Woodbury, MN (US);
Harry Stone, White Bear Lake, MN (US);
Jodi Zilinski, Brookfield, WI (US);
John E. Burnes, Andover, MN (US);
Yong K. Cho, Maple Grove, MN (US);
David Igel, Lino Lakes, MN (US);
Luc R. Mongeon, Minneapolis, MN (US);
John C. Rueter, Woodbury, MN (US);
Harry Stone, White Bear Lake, MN (US);
Jodi Zilinski, Brookfield, WI (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
Methods and devices for determining optimal Atrial to Ventricular (AV) pacing intervals and Ventricular to Ventricular (VV) delay intervals in order to optimize cardiac output. Impedance, preferably sub-threshold impedance, is measured across the heart at selected cardiac cycle times as a measure of chamber expansion or contraction. One embodiment measures impedance over a long AV interval to obtain the minimum impedance, indicative of maximum ventricular expansion, in order to set the AV interval. Another embodiment measures impedance change over a cycle and varies the AV pace interval in a binary search to converge on the AV interval causing maximum impedance change indicative of maximum ventricular output. Another method varies the right ventricle to left ventricle (VV) interval to converge on an impedance maximum indicative of minimum cardiac volume at end systole. Another embodiment varies the VV interval to maximize impedance change.