Multiple stage morphology-based system detecting ventricular tachycardia and supraventricular tachycardia
AssigneeCardiac Pacemakers, Inc.
InventorsWilliam Hsu, Alan F. Marcovecchio
Life of this patent
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Abstract
A system for detecting ventricular tachycardia and supraventricular tachycardia using a multiple stage morphology based system. Cardiac signals are sensed from a patient's heart and analyzed for the occurrence of a tachycardia event. When a tachycardia event is detected, the method and system analyzes a plurality of features of the sensed cardiac signals in two or more discrimination stages. Each of the two or more discrimination stages classify the tachycardia event as either a ventricular tachycardia or a candidate supraventricular tachycardia event. When a discrimination stage detects the occurrence of a ventricular tachycardia, therapy is delivered to the heart to treat the ventricular tachycardia.
Claims11
A method comprising:
- sensing cardiac signals representative of electrical cardiac activity;
- during a tachycardia event, detecting a sensed R-wave from one or more complexes of the cardiac signals;
- measuring a width of the sensed R-wave;
- comparing the width of the sensed R-wave to a template R-wave width;
- if the width of the sensed R-wave is less than a predetermined value of the template R-wave width, analyzing a morphological similarity of the cardiac signals to a normal sinus rhythm template complex to determine if a ventricular tachycardia condition is present.
Dependencies are inferred from the claim text.