Non-invasive evaluation of left ventricular power output by simultaneous recordings of applanation tonometry and echocardiographic Doppler signals

S. Carlier*, T. Marwick, P. Segers, P. Verdonck, G. Van Camp, B. Cosyns, J. D. Thomas

*Corresponding author for this work

Research output: Contribution to journalConference article

5 Scopus citations

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 languageEnglish (US)
Pages (from-to)223-226
Number of pages4
JournalComputers in Cardiology
StatePublished - Dec 1 1997
EventProceedings of the 1997 24th Annual Meeting on Computers in Cardiology - Lund, Sweden
Duration: Sep 7 1997Sep 10 1997

ASJC Scopus subject areas

  • Computer Science Applications
  • Cardiology and Cardiovascular Medicine

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