5th International ICST Conference on Body Area Networks

Research Article

Microsensors for Continuous Monitoring of Heart Function

  • @INPROCEEDINGS{10.1145/2221924.2221948,
        author={Lars Hoff and Kristin Imenes and Lars Fleischer and Per Steinar Halvorsen and Andreas Espinoza and Espen Remme and Ole Jakob Elle and Erik Fosse},
        title={Microsensors for Continuous Monitoring of Heart Function},
        proceedings={5th International ICST Conference on Body Area Networks},
        keywords={cardiac monitoring accelerometer ultrasound miniature sensor},
  • Lars Hoff
    Kristin Imenes
    Lars Fleischer
    Per Steinar Halvorsen
    Andreas Espinoza
    Espen Remme
    Ole Jakob Elle
    Erik Fosse
    Year: 2012
    Microsensors for Continuous Monitoring of Heart Function
    DOI: 10.1145/2221924.2221948
Lars Hoff1,*, Kristin Imenes1, Lars Fleischer1, Per Steinar Halvorsen2, Andreas Espinoza2, Espen Remme2, Ole Jakob Elle2, Erik Fosse2
  • 1: Vestfold University College
  • 2: Oslo University Hospital. The Interventional Centre
*Contact email: lars.hoff@hive.no


We are developing two new sensor systems for continuous monitoring of the cardiac function during and after surgery. The first system uses triple-axis accelerometers to measure motion of the epicardial surface, while the second system uses miniature ultrasound transducers fastened to the heart surface to measure the contraction pattern of the heart muscle. The systems have been tested in animal experiments and in patient trials. Both systems have proven their ability to deliver high quality measurements of the heart’s motion and contraction, and to detect changes caused by occlusion of an artery. The ultrasound probes deliver very local information from where the transducer is fastened, while the accelerometer data seem to be more linked to global heart function. The ultrasound system requires high data rates and heavy processing, but the processed results are straightforward to interpret. For the accelerometer, the required data transfer rates and processing power is quite low. The optimal processing scheme for the accelerometer recordings is not so straightforward, but different schemes have been tested with promising results. The two systems are integrated with ECG and pressure measurements to a “multi-sensor system for the heart”.