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US 2014/0277239 A1Published application
Estimating electromechanical delay to optimize pacing parameters in rbbb patients
AssigneeCardiac Pacemakers, Inc.
InventorsBarun Maskara, Qi An, Pramodsingh Hirasingh Thakur, Julie A. Thompson
Life of this patent
Estimating the term…
Abstract
Stimulation energy can be provided to stimulate synchronous ventricular contractions. Interval information obtained from a cardiac electrical heart signal and a cardiac mechanical heart signal can be used to determine a right ventricular activation time. The interval information can provide a cardiac stimulation indication.
Claims20
A system comprising:
- a cardiac electrical heart signal activation sensing circuit, configured to detect at least one of a right ventricular activation or a right ventricular electrostimulation, and to determine therefrom a corresponding right ventricular activation time;
- a cardiac mechanical heart signal sensor interface circuit, configured to distinguish a pulmonary valve opening from other information associated with an S1 heart sound, and to determine therefrom a corresponding subsequent pulmonary valve opening time occurring during the same cardiac cycle;
- a timer circuit, coupled to the cardiac electrical heart signal activation circuit and the cardiac mechanical heart signal sensor interface circuit, the timer circuit configured to measure a first time interval between the detected right ventricular activation and the subsequent pulmonary valve opening time occurring during the same cardiac cycle;
- and
- a cardiac electrostimulation circuit, coupled to the timer circuit, the cardiac electrostimulation circuit configured to deliver electrostimulations to the heart, the cardiac electrostimulation circuit including at least one operational parameter determined using the first time interval between the detected right ventricular activation and the subsequent pulmonary valve opening time occurring during the same cardiac cycle.
2 more elements
A method comprising:
- detecting at least one of a right ventricular activation or a right ventricular electrostimulation, and determining therefrom a corresponding right ventricular activation time;
- distinguishing a pulmonary valve opening from other information associated with an S1 heart sound, and determining therefrom a corresponding subsequent pulmonary valve opening time occurring during the same cardiac cycle;
- measuring a first time interval between the detected right ventricular activation and the subsequent pulmonary valve opening time occurring during the same cardiac cycle;
- determining at least one operational parameter using the first time interval between the detected right ventricular activation and the subsequent pulmonary valve opening time occurring during the same cardiac cycle;
- and
- delivering electrostimulations to the heart.
3 more elements
A system comprising:
- a cardiac electrical heart signal activation sensing circuit, configured to detect at least one of a right ventricular activation or a right ventricular electrostimulation, and to determine therefrom a corresponding right ventricular activation time;
- an impedance feature detector circuit, configured to detect at least one of:
- a right ventricular impedance feature and to provide a corresponding right ventricular impedance feature detection time;
- or
- a left ventricular impedance feature and to provide a corresponding left ventricular impedance feature detection time;
- a filter circuit, configured to use information about one or more of the right ventricular or left ventricular impedance feature detection times to filter a signal to extract the pulmonary valve opening information;
- a timer circuit, coupled to the cardiac electrical heart signal activation circuit and the impedance feature detector circuit, the timer circuit configured to measure a first time interval between the detected right ventricular impedance feature and the filtered pulmonary valve opening information;
- and
- a cardiac electrostimulation circuit, coupled to the timer circuit, the cardiac electrostimulation circuit configured to deliver electrostimulations to the heart, the cardiac electrostimulation circuit including at least one operational parameter determined using the first time interval between the detected right ventricular impedance feature and the filtered pulmonary valve opening information during the same cardiac cycle.
6 more elements
Dependencies are inferred from the claim text.