发明名称 |
Optimization of Pacemaker Settings with R-Wave Detection |
摘要 |
The system provides information to facilitate efficient optimization of programmer settings for cardiac pacemakers. It simultaneously measures a patient's electrocardiogram and peripheral blood pressure (or volumetric displacement) waveform in order to calculate, in real-time and non-invasively, a value correlated to the pre-ejection time (PET) and, optionally, ejection duration (ED) for the patient's left ventricle. The peripheral pulse waveform can be monitored with a wrist mounted tonometer, or a suitable brachial cuff device. The time difference between the occurrence of the R-wave on the ECG trace and the foot of the pulse on the radial blood pressure waveform is defined as a surrogate pre-ejection time interval (SPET). Data including the electrocardiogram and peripheral pulse trace, as well as the calculated, surrogate pre-ejection time interval (SPET) for each heart beat and trending is displayed on a computer monitor, thereby allowing a physician or nurse to quickly optimize PET for the patient and adjust programmer settings for an implanted pacemaker. |
申请公布号 |
US2015165211(A1) |
申请公布日期 |
2015.06.18 |
申请号 |
US201414571884 |
申请日期 |
2014.12.16 |
申请人 |
ATCOR MEDICAL PTY LTD |
发明人 |
Naqvi Tasneem Z.;Winter Dean C. |
分类号 |
A61N1/365;A61N1/368 |
主分类号 |
A61N1/365 |
代理机构 |
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代理人 |
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主权项 |
1. A method of optimizing one or more programmer settings of a cardiac pacemaker comprising the steps of:
attending to a patient with a cardiac pacemaker having one or more programmable settings; measuring the electrical activity of a heart of the patient in the form of an electrocardiogram which plots a sensed voltage difference between electrodes placed noninvasively in the patient's skin as a function of time, for each pulse of the heart, the electrocardiogram being characterized in part by a QRS complex having an R-wave; simultaneously using a sensor to measure a peripheral pulse waveform of the patient as a function of time; for each respective pulse, determining from the electrocardiogram the R-wave of the QRS complex and defining a time corresponding to the R-wave as an R-wave impulse time (TR) for a contracting ventricle; for each respective pulse, determining the realization of systolic onset in the detected peripheral pulse waveform and defining the corresponding time as a peripherally measured systolic onset time (T2) for the pulse; using TR and T2 to calculate an R-wave surrogate pre-ejection time interval SPET for the pulse; presenting information related to the calculated R-wave surrogate pre-ejection interval (SPET); and adjusting one or more of the programmable settings for the cardiac pacemaker in an effort to optimize the value of the calculated surrogate pre-ejection time interval SPET for the patient. |
地址 |
West Ryde AU |