Abstract
Ventricular hydraulic power is defined as the instantaneous product of flow and pressure at the aortic root. This paper describes a system for non-invasive determination of LV power output based on simultaneous acquisition of applanation tonometry for aortic blood pressure (BP) evaluation and echo-Doppler signals for flow measurement. Acquisition is performed with a dedicated A/D system allowing on-line visualization of Doppler power spectra and calibrated tonometric signals (using mean and diastolic cuff BP at brachial level). Aortic BP is estimated either using an aorto-radial transfer function, either untransformed carotid BP. This method has been investigated in 10 normal volunteers. Visualization of calibrated data during acquisition allowed recordings with a low variability (mean standard deviation of reconstructed systolic BP<5 mmHg). Expected increase in systolic BP was observed from carotid to radial sites. Mean peak power was 6±2W.
Original language | English (US) |
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Pages (from-to) | 223-226 |
Number of pages | 4 |
Journal | Computers in Cardiology |
State | Published - 1997 |
Event | Proceedings of the 1997 24th Annual Meeting on Computers in Cardiology - Lund, Sweden Duration: Sep 7 1997 → Sep 10 1997 |
ASJC Scopus subject areas
- Computer Science Applications
- Cardiology and Cardiovascular Medicine