Pacemaker with determination of the dependency of cardiac output on the AV-delay

US6937902B2 · kind B2 · utility

Assignee

• ST. JUDE MEDICAL AB · SE

Inventors

• Johan Lidman · Stockholm, SE
• Nils Holmstrom · Järfälla, SE
• Kjell Noren · Solna, SE

Key dates

• Filing date: Apr 23, 2001
• Grant date: Aug 30, 2005
• Expiry date: Feb 7, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/3682
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A cardiac pacemaker has a pulse generator for delivering stimulation pulses to a patient's heart and a control unit for controlling the delivery of the stimulation pulses from the pulse generator. The control unit includes an altering unit for altering the AV-delay value from a predetermined first AV-delay value to a predetermined second AV-delay value, and back to the first AV-delay value. A sensor measures a parameter related to cardiac output of the patient, the sensor measuring this parameter in a time window within a time of operation with the first AV-delay value, and in a time window within the time of operation with said second AV-delay value, and in a time window within the time of operation after the return back to the first AV-delay value. A calculation unit calculates respective average values of the parameter during each of the time windows, and a determining unit determines from these average values which of the AV-delay values results in a higher cardiac output.