Patent Number: 6,480,739

Title: Avoiding far-field QRS in a tachy detections device

Abstract: Method for avoiding the detection of a far-field QRS by the atrial detector of a heart pacemaker or ICD while allowing the detection of a true atrial signal to a maximum possible extent; the method comprising generating a Short Atrial Refractory Period (SARP) following an atrial sensed or paced event by means of a SARP timer, blanking of the atrial detector following a ventricular paced event, generating a Post Ventricular Short Atrial Refractory Period (PVSARP) following a ventricular sensed or paced event by means of a PVSARP timer, generating a temporary decrease in the sensivity of an amplifier for the atrial signal for a time period following the elapse of the mentioned PVSARP, and gradually increasing the sensitivity of the amplifier for the atrial signal after said time period.

Inventors: Nigam; Indra B. (Tigard, OR), Hahn; Andreas (Berlin, DE), Kucher; Andreas (Schwedt, DE), Shekhar; Mrigank (Tualatin, OR)

Assignee: Biotronik Mess - und Therapiegerate GmbH & Co. Ingenieurburo Berlin

International Classification: A61N 1/362 (20060101); A61N 001/362 ()

Expiration Date: 11/12/2019