Implantable medical device and method comprising means for detecting and classifying an arrhythmia

US8738120B2 · kind B2 · utility

Assignee

• ST. JUDE MEDICAL AB · SE

Inventors

• Anders Bjorling · Järfälla, SE
• Malin Hollmark · Solna, SE
• Tomas Svensson · Bunkeflo, SE
• Stefan Hjelm · Bålsta, SE
• Kjell Noren · Solna, SE
• Karin Jarverud · Sundbyberg, SE

Key dates

• Filing date: May 12, 2010
• Grant date: May 27, 2014
• Expiry date: May 13, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/3622
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An implantable medical device (100) is configured for generating a cardiogenic impedance signal representative of the cardiogenic impedance of at least a portion of a heart (10) of a subject (20) during at least a portion of cardiac cycle. A moment processor (132) calculates a moment parameter value based on the cardiogenic impedance signal. The moment parameter is representative of a weighted sum of impedance amplitudes within a time window centered at defined time instance within the cardiac cycle. The weights of the impedance amplitudes are further dependent on the length in time between the defined time instance and the point of time of the associated impedance amplitude. The moment parameter is of high diagnostic value and is employed by an arrhythmia classifier (132) in order to classify a detected arrhythmia of the heart (10), such as discriminate between hemodynamically stable or unstable arrhythmias and/or supraventricular or ventricular tachycardia.