| US 7,593,766 B2 | ||
| Detector for atrial flutter and atrial fibrillation | ||
| Thomas S. Faber, Freiburg (Germany); Michael Lippert, Ansbach (Germany); and Marc Oliver Schweika-Kresimon, Herne (Germany) | ||
| Assigned to Biotronik CRM Patent AG, Baar (Switzerland) | ||
| Filed on Dec. 21, 2006, as Appl. No. 11/614,546. | ||
| Application 11/614546 is a continuation in part of application No. 11/541054, filed on Sep. 29, 2006, granted, now 7,570,990. | ||
| Claims priority of application No. 10 2005 047 320 (DE), filed on Sep. 30, 2005. | ||
| Prior Publication US 2007/0156058 A1, Jul. 05, 2007 | ||
| Int. Cl. A61B 5/04 (2006.01) | ||
| U.S. Cl. 600—518 [600/509; 600/515; 607/14] | 23 Claims |
| 1. A detector for atrial fibrillation and/or atrial flutter comprising:
an atrial input configured to receive an atrial signal representing an intraatrial electrogram or a time course of an intraatrial
impedance;
a ventricular input configured to receive a ventricular event signal comprising information on an occurrence of a cyclically
reoccurring ventricular event in chronological association to said atrial signal received via said atrial input;
an averaging unit that is configured to average a plurality of sections of said atrial signal, each section to be considered
for averaging starts at a predefined offset with respect to a ventricular event and ends at the predefined offset before a
next ventricular event, and wherein said averaging unit is further configured to put out an average atrial signal;
a peak amplitude determination unit that is configured to determine a peak-to-peak amplitude of said averaged atrial signal;
and,
a threshold comparator that is configured to compare said peak-to-peak amplitude of said averaged atrial signal to a predetermined
reference value and to generate an AF warning signal if said peak-to-peak amplitude of said averaged atrial signal is less
than said predetermined reference value.
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