Abstract
The role of the duty factor (DF) in ultrasound-mediated cardiac stimulation is studied. Five 3-month-old female rats were exposed transthoracically to 3.5-MHz ultrasonic pulses of 2.0-MPa peak rarefactional pressure amplitude, variable DF, and variable pulse repetition frequency. A change in the heart rate was not observed following the 0.25%-DF sequence. A decrease of ∼4% in the heart rate was observed following the 0.50%-DF and 1.00%-DF sequences. Outcomes suggest a possible DF threshold for cardiac pacing.
| Original language | English (US) |
|---|---|
| Pages (from-to) | EL231-EL235 |
| Journal | Journal of the Acoustical Society of America |
| Volume | 136 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 1 2014 |
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics