Early recognition of regional cardiac ischemia using a 3-axis accelerometer sensor.
作者： Ole Jakob Elle , Steinar Halvorsen , Martin Gunnar Gulbrandsen , Lars Aurdal , Andre Bakken
DOI: 10.1088/0967-3334/26/4/009
关键词:
摘要: Perioperative mortality in coronary artery bypass grafting is usually caused by reduced left ventricular function due to regional myocardial ischemia or infarction. Post-operative graft occlusion a well-known problem surgery. A sensitive tool detect and monitor may give the opportunity revise malfunctioning grafts before departure from hospital. This paper describes how new method can cardiac using 3-axis piezoelectric accelerometer. In three anesthetized pigs, accelerometer was sutured on lateral free wall of ventricle. The anterior descending (LAD) occluded for different time periods data were sampled with PC. Short-time Fourier transform calculated based series. results visualized 2D color-coded time-frequency plot. area occlusion, change stronger power higher harmonics observed. Consequently, difference value between instant frequency pattern reference showed rise absolute during period. preliminary indicate that early recognition possible analyzing acquired animal trials prototype sensor.
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