Ventricular safety pacing in biventricular pacing
First Claim
1. A method of pacing for use in a medical device, the method comprising:
- providing a paced AV delay following an atrial paced event, wherein the paced AV delay is a predetermined time period initiated by the atrial paced event;
defining a ventricular safety pacing window during at least an initial portion of the paced AV delay, wherein the paced AV delay further comprises a remainder period if the paced AV delay is longer than the ventricular safety pacing window;
sensing ventricular events at only one ventricular side of a patient'"'"'s heart;
delivering ventricular stimulus to the at least one ventricular side of the patient'"'"'s heart upon expiration of the paced AV delay if no ventricular events are sensed during the ventricular safety pacing window defined during at least the initial portion of the paced AV delay and the remainder portion of the paced AV delay;
inhibiting the delivery of ventricular stimulus upon expiration of the paced AV delay if no ventricular events are sensed during the ventricular safety pacing window but a ventricular event is sensed during the remainder portion of the paced AV delay; and
if a ventricular event is sensed during the ventricular safety pacing window, committing to delivery of ventricular stimulus upon expiration of the ventricular safety pacing window or the paced AV delay, which ever is shorter, only to the one ventricular side of the patient'"'"'s heart where ventricular events are sensed.
1 Assignment
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Accused Products
Abstract
A pacing method and apparatus includes providing an AV interval initiated by occurrence of either an atrial paced or sensed event. A ventricular safety pacing window is defined. In one embodiment, ventricular events are sensed at only one ventricular side and if a ventricular event is sensed during the ventricular safety pacing window, then a commitment is made to delivery of ventricular stimulus only to the one ventricular side of the patient'"'"'s heart where the ventricular event is sensed. Further, in another embodiment, sensing of ventricular events may occur at both ventricular sides during the ventricular safety pacing window. If a ventricular event is sensed during the ventricular safety pacing window at a first ventricular side, then commitment is made to delivery of ventricular stimulus to at least the first ventricular side. Further, upon such sensing, modification is provided to reduce the likelihood of sensing ventricular events at the second ventricular side for a predetermined time period following the sensing of the ventricular event at the first side.
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Citations
52 Claims
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1. A method of pacing for use in a medical device, the method comprising:
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providing a paced AV delay following an atrial paced event, wherein the paced AV delay is a predetermined time period initiated by the atrial paced event;
defining a ventricular safety pacing window during at least an initial portion of the paced AV delay, wherein the paced AV delay further comprises a remainder period if the paced AV delay is longer than the ventricular safety pacing window;
sensing ventricular events at only one ventricular side of a patient'"'"'s heart;
delivering ventricular stimulus to the at least one ventricular side of the patient'"'"'s heart upon expiration of the paced AV delay if no ventricular events are sensed during the ventricular safety pacing window defined during at least the initial portion of the paced AV delay and the remainder portion of the paced AV delay;
inhibiting the delivery of ventricular stimulus upon expiration of the paced AV delay if no ventricular events are sensed during the ventricular safety pacing window but a ventricular event is sensed during the remainder portion of the paced AV delay; and
if a ventricular event is sensed during the ventricular safety pacing window, committing to delivery of ventricular stimulus upon expiration of the ventricular safety pacing window or the paced AV delay, which ever is shorter, only to the one ventricular side of the patient'"'"'s heart where ventricular events are sensed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of pacing for use in a medical device, the method comprising:
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providing an AV delay initiated by occurance of either an atrial sensed event or an atrial paced event, wherein the AV delay is a programmed time period;
defining a ventricular safety pacing window during at least an initial portion of the AV delay;
sensing ventricular events at only one ventricular side of a patient'"'"'s heart during at least the ventricular safety pacing window; and
if a ventricular event is sensed during the ventricular safety pacing window, then committing to delivery of ventricular stimulus only to the one ventricular side of the patient'"'"'s heart where the ventricular event is sensed. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of pacing for use in a medical device, the method comprising:
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providing an AV delay initiated by occurrence of either an atrial sensed event or an atrial paced event, wherein the AV delay is a programmed time period;
defining a ventricular safety pacing window during at least an initial portion of the AV delay;
sensing ventricular events at both ventricular sides of a patient'"'"'s heart during at least the ventricular safety pacing window;
if a ventricular event is sensed during the ventricular safety pacing window at a first ventricular side of the patient'"'"'s heart, then committing to the delivery of ventricular stimulus to at least the first ventricular side of the patient'"'"'s heart; and
modifying at least one parameter associated with sensing at the second ventricular side of the patient'"'"'s heart to reduce the likelihood of sensing ventricular events for a predetermined time period following the sensing of the ventricular event at the first side of the patient'"'"'s heart. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 33, 34)
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28. A dual chamber pacing apparatus, the apparatus comprising:
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atrial pacing circuitry operable to at least generate atrial pacing pulses;
ventricular pacing and sensing circuitry operable to generate ventricular pacing pulses for stimulating at least one ventricular side of a patient'"'"'s heart via at least one ventricular lead and for use in sensing ventricular events at only one ventricle side of the patient'"'"'s heart via the at least one ventricular lead; and
control circuitry operable to;
provide a paced AV delay following an atrial paced event, wherein the paced AV delay is a predetermined time period initiated by the atrial paced event;
define a ventricular safety pacing window during at least an initial portion of the paced AV delay, wherein the paced AV delay further comprises a remainder portion if the paced AV delay is longer than the ventricular safety pacing window;
sense ventricular events at only one ventricle side of a patient'"'"'s heart at least during the ventricular safety pacing window;
control delivery of ventricular stimulus using the ventricular pacing circuitry such that;
if no ventricular events are sensed during the ventricular safety pacing window defined during the initial portion of the paced AV delay and the remainder portion thereof, then ventricular stimulus is delivered to at least one ventricle upon expiration of the paced AV delay;
if no ventricular events are sensed during the ventricular safety pacing window but a ventricular event is sensed during the remainder portion of the paced AV delay, then inhibiting the delivery of ventricular stimulus upon expiration of the paced AV delay; and
if a ventricular event is sensed during the ventricular safety pacing window, committing to the delivery of a ventricular stimulus only to the ventricular side of the patient'"'"'s heart where ventricular events are sensed. - View Dependent Claims (29, 30, 31, 32)
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35. A dual chamber pacing apparatus, the apparatus comprising:
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atrial pacing and sensing circuitry operable to at least generate atrial pacing pulses and sense atrial events;
ventricular pacing and sensing circuitry operable to generate ventricular pacing pulses for stimulating at least one ventricular side of a patient'"'"'s heart via at least one ventricular lead and for use in sensing ventricular events at only one ventricular side of the patient'"'"'s heart via the at least one ventricular lead; and
control circuitry operable to;
provide an AV delay initiated by occurrence of either an atrial sensed event or an atrial paced event, wherein the AV delay is a programmed time period;
define a ventricular safety pacing window during at least an initial portion of the AV delay;
sense ventricular events at only one ventricular side of the patient'"'"'s heart during at least the ventricular safety pacing window; and
control delivery of ventricular stimulus such that if a ventricular event is sensed during the ventricular safety pacing window, then committing to the delivery of ventricular stimulus only to the one ventricular side of the patient'"'"'s heart where ventricular events are sensed. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43)
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44. A dual chamber pacing apparatus, the apparatus comprising:
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atrial pacing and sensing circuitry operable to generate atrial pacing pulses and sense atrial events;
ventricular pacing and sensing circuitry operable to generate ventricular pacing pulses for stimulating both ventricular sides of a patient'"'"'s heart via one or more ventricular leads and for use in sensing ventricular events in both ventricular sides via the one or more ventricular leads; and
control circuitry operable to;
provide an AV delay initiated by occurrence of either an atrial sensed event or an atrial paced event, wherein the AV delay is a programmed time period;
define a ventricular safety pacing window during at least an initial portion of the AV delay;
sense ventricular events at both ventricular sides of the patient'"'"'s heart during at least the ventricular safety pacing window;
control delivery of ventricular stimulus such that if a ventricular event is sensed during the ventricular safety pacing window at a first ventricular side of the patient'"'"'s heart, then committing to delivery of ventricular stimulus to at least the first ventricular side of the patient'"'"'s heart; and
modify at least one parameter associated with sensing at the second ventricular side of the patient'"'"'s heart to reduce the likelihood of sensing ventricular events for a predetermined time period following the sensing of the ventricular event at the first side of the patient'"'"'s heart. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52)
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Specification