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SYSTEMS AND METHODS FOR DETERMINING OPTIMAL INTERVENTRICULAR PACING DELAYS BASED ON ELECTROMECHANICAL DELAYS
专利权人:
INC.;PACESETTER
发明人:
Xiaoyi Min
申请号:
US14605863
公开号:
US20150142071A1
申请日:
2015.01.26
申请国别(地区):
US
年份:
2015
代理人:
摘要:
Techniques are provided for use with implantable medical devices such as pacemakers for optimizing interventricular (VV) pacing delays for use with cardiac resynchronization therapy (CRT). In one example, ventricular electrical depolarization events are detected within a patient in whom the device is implanted. The onset of isovolumic ventricular mechanical contraction is also detected based on cardiomechanical signals detected by the device, such as cardiogenic impedance (Z) signals, S1 heart sounds or left atrial pressure (LAP) signals. Then, an electromechanical time delay (T_QtoVC) between ventricular electrical depolarization and the onset of isovolumic ventricular mechanical contraction is determined. VV pacing delays are set to minimize the time delay to the onset of isovolumic ventricular mechanical contraction. Various techniques for identifying the onset of isovolumic ventricular contraction based on Z, S1 or LAP or other cardiomechanical signals are described. In some examples, CRT nonresponders are specifically identified and/or heart failure progression is tracked.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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