Classification of supraventricular and ventricular cardiac rhythms using cross channel timing algorithm
First Claim
1. A system for use with a supraventricular electrode and first and second defibrillation electrodes, the system comprising:
- a sensing system, adapted for coupling to the first and second defibrillation electrodes to detect a first cardiac signal between the first and second defibrillation electrodes, and adapted for coupling to the supraventricular electrode to monitor an atrial cardiac signal for atrial cardiac complexes and configured to extract an intrinsic atrial rate from the detected atrial cardiac complexes;
a pace output circuit, adapted for coupling to the supraventricular electrode and to deliver electrical pulses to the supraventricular electrode faster than the extracted intrinsic atrial rate;
a control system, coupled to the sensing system and the pace output circuit, configured to extract first model cardiac complexes from the first cardiac signal as the electrical pulses are delivered to the supraventricular electrode; and
a morphology analyzing circuit, coupled to the control system to receive the first model cardiac complexes for creating a template of one or more first model cardiac complexes obtained from the first cardiac signal as the electrical pulses are delivered to the supraventricular electrode.
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Abstract
A system and method for classifying cardiac complexes sensed during a tachycardia episode. A first cardiac signal and a second cardiac signal are sensed, where the first cardiac signal has a voltage. A first cardiac complex and a second cardiac complex of a cardiac cycle are detected in the first and second cardiac signal, respectively. A predetermined alignment feature is identified in the second cardiac complex. A datum is defined, or positioned, at a specified interval from the predetermined alignment feature of the second cardiac complex. Voltage values are then measured from the first cardiac complex at each of two or more measurement intervals from the datum. The voltage values are then compared voltage values measured from NSR cardiac complexes to classify the first cardiac complex is either a ventricular tachycardia complex or a supraventricular tachycardiac complex.
158 Citations
15 Claims
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1. A system for use with a supraventricular electrode and first and second defibrillation electrodes, the system comprising:
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a sensing system, adapted for coupling to the first and second defibrillation electrodes to detect a first cardiac signal between the first and second defibrillation electrodes, and adapted for coupling to the supraventricular electrode to monitor an atrial cardiac signal for atrial cardiac complexes and configured to extract an intrinsic atrial rate from the detected atrial cardiac complexes; a pace output circuit, adapted for coupling to the supraventricular electrode and to deliver electrical pulses to the supraventricular electrode faster than the extracted intrinsic atrial rate; a control system, coupled to the sensing system and the pace output circuit, configured to extract first model cardiac complexes from the first cardiac signal as the electrical pulses are delivered to the supraventricular electrode; and a morphology analyzing circuit, coupled to the control system to receive the first model cardiac complexes for creating a template of one or more first model cardiac complexes obtained from the first cardiac signal as the electrical pulses are delivered to the supraventricular electrode. - View Dependent Claims (2, 3)
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4. A system, comprising:
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means for delivering electrical pulses to a supraventricular location faster than a calculated average intrinsic atrial rate; means for detecting a first cardiac signal as the electrical pulses are delivered to the supraventricular location and for determining the calculated average intrinsic atrial rate; means for detecting cardiac complexes in the first cardiac signal as the electrical pulses are delivered to the supraventricular location; and means for creating a template from the cardiac complexes that were detected as the electrical pulses are delivered to the supraventricular location. - View Dependent Claims (5)
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6. A method, comprising:
- determining an intrinsic atrial rate
delivering electrical pulses to a supraventricular location faster than the determined intrinsic atrial rate; detecting a first cardiac signal as the electrical pulses are delivered to the supraventricular location; detecting cardiac complexes in the first cardiac signal as the electrical pulses are delivered to the supraventricular location; and creating a template from the cardiac complexes that were detected as the electrical pulses are delivered to the supraventricular location. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
- determining an intrinsic atrial rate
Specification