PACEMAKER MEDIATED TACHYCARDIA DETECTION AND INTERVENTION
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Accused Products
Abstract
A method of employing an implantable medical device to detect pacemaker mediated tachycardia (PMT) and adjusting a parameter (e.g. PVARP) in response to confirmation of the PMT. The method comprises, with a processor located in the implantable medical device, (1) measuring a first Vp-As (VA1), (2) lengthening SAV by 50 ms for 1 beat in response to measuring VA1, (3) measuring a second Vp-As (VA2), (4) returning to a normal SAV, (5) measuring a third Vp-As (VA3), (6) determining whether VA1=VA2 and VA1=VA3, (7) in response to determining whether VA1=VA2 and VA1=VA3, confirming presence of PMT, and (8) in response to confirming presence of PMT, PVARP is extended.
15 Citations
50 Claims
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1-24. -24. (canceled)
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25. An implantable medical device configured to detect pacemaker mediated tachycardia (PMT) comprising:
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a sensing module configured to sense atrial events (As); a signal generator configured to generate and deliver electrical ventricular stimulation pulses (Vp); a processor coupled to the sensing module and the signal generator and configured to control the stimulation generator to deliver a said Vp on expiration of a defined SAV interval following a said As, the processor further configured to; (1) measure a first Vp-As interval (VA1), (2 lengthen a subsequent SAV interval by a certain amount of time over the defined SAV interval for 1 beat in response to measuring VA1, (3) measure a second Vp-As (VA2), (4) determine whether VA1 is about equal to VA2, (5) in response to determining whether VA1 is about equal VA2, confirming presence of PMT, and (6) in response to confirming presence of PMT, extending a post-ventricular atrial refractory period (PVARP) following a subsequent said Vp by a pre-specified amount of time. - View Dependent Claims (26)
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34. A system to detect pacemaker mediated tachycardia (PMT) comprising:
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sensing means for sensing atrial events (As); signaling means for generating and delivering electrical ventricular stimulation pulses (Vp); processing means for controlling the sensing means to deliver a said Vp on expiration of a defined SAV interval following a said As, the processing means further configured to; (1) measure a first Vp-As interval (VA1), (2 lengthen a subsequent SAV interval by a certain amount of time over the defined SAV interval for 1 beat in response to measuring VA1, (3) measure a second Vp-As (VA2), (4) determine whether VA1 is about equal to VA2, (5) in response to determining whether VA1 is about equal VA2, confirming presence of PMT, and (6) in response to confirming presence of PMT, extending a post-ventricular atrial refractory period (PVARP) following a subsequent said Vp by a pre-specified amount of time. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. A method of employing an implantable medical device to detect pacemaker mediated tachycardia (PMT) and adjust a parameter in response to detection of the PMT, the method comprising:
with a processor located in the implantable medical device, the processor configured to; (1) measure a first Vp-As interval (VA1), (2 lengthen a subsequent SAV interval by a certain amount of time over the defined SAV interval for 1 beat in response to measuring VA1, (3) measure a second Vp-As (VA2), (4) determine whether VA1 is about equal to VA2, (5) in response to determining whether VA1 is about equal VA2, confirming presence of PMT, and (6) in response to confirming presence of PMT, lengthening a post-ventricular atrial refractory period (PVARP) following a subsequent said Vp by a pre-specified amount of time. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
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50. A method of employing an implantable medical device to detect pacemaker mediated tachycardia (PMT) and adjust a parameter in response to detection of the PMT, the method comprising:
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sensing atrial events (As) with a sensing module coupled to a processor; generating and delivering electrical ventricular stimulation pulses (Vp) by a signal generator coupled to the processor, the processor configured to control the stimulation generator to deliver a said Vp on expiration of a defined SAV interval following a said As. the processor further configured to; (1) measure a first Vp-As interval (VA1), (2 lengthen a subsequent SAV interval by a certain amount of time over the defined SAV interval for 1 beat in response to measuring VA1, (3) measure a second Vp-As (VA2), (4) determine whether VA1 is about equal to VA2, (5) in response to determining whether VA1 is about equal VA2, confirming presence of PMT, and (6) in response to confirming presence of PMT, lengthening a post-ventricular atrial refractory period (PVARP) following a subsequent said Vp by a pre-specified amount of time.
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Specification