Spatial distribution measurement of heart wall vibrations generated by remote perturbation of inner pressure

Hiroshi Kanai, Hideyuki Hasegawa, Kohsuke Imamura

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


It is essential for the diagnosis of heart diseases to noninvasively measure instantaneous myocardial movability and transition properties during one cardiac cycle. This study proposes a novel method of noninvasively perturbing left ventricle (LV) internal pressure by remotely actuating the brachium artery with sinusoidal vibration for the diagnosis of myocardial movability. By attaching an actuator to the brachium artery and driving it with a sinusoidal wave of f0 Hz, the internal pressure of the artery is perturbed. The perturbation propagates along the artery to the LV of the heart and the sinusoidal perturbation of the LV internal pressure is induced. Using an ultrasound-based phased tracking method, the resultant minute motion of the heart wall can be noninvasively measured. Because the vibration mode of the heart wall depends on actuation frequency, by phantom experiments using a spherical shell made of silicone rubber, to which a silicone rubber tube is connected, the vibration mode was identified from the measurement of the spatial distribution of the motions by scanning with an ultrasonic beam. From an in vivo experiment, the principle of remote actuation was confirmed.

Original languageEnglish
Pages (from-to)4718-4721
Number of pages4
JournalJapanese Journal of Applied Physics
Issue number5 B
Publication statusPublished - 2006 May 25


  • Internal pressure
  • Myocardium movability
  • Myocardium vibration
  • Phased tracking method
  • Remote actuation
  • Tissue characterization
  • Vibration mode
  • Viscoelasticity


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