Open AccessCombined doppler and phased-array echocardiographic estimation of cardiac output.
Author(s) -
Paul A. Magnin,
Jeanette A. Stewart,
Stephen Myers,
O von Ramm,
Kisslo Ja
Publication year - 1981
Publication title -
circulation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.795
H-Index - 607
eISSN - 1524-4539
pISSN - 0009-7322
DOI - 10.1161/01.cir.63.2.388
Subject(s) - pulsatile flow , doppler effect , medicine , biomedical engineering , cardiac output , cardiac catheterization , volume (thermodynamics) , flow (mathematics) , phased array , doppler echocardiography , flow measurement , hemodynamics , cardiology , diastole , mechanics , blood pressure , telecommunications , physics , quantum mechanics , astronomy , antenna (radio) , computer science
The capability of a pulsed Doppler flowmeter combined with a phased-array imaging system to measure volume flow was tested in vitro and in patients undergoing cardiac catheterization. The Doppler-phased-array system (DPA) was used to determine vessel diameter and a superimposed cursor was used to locate the range and angle of the Doppler sample volume. DPA estimates of continuous flow through tubing in a water tank correlated strongly (r = 0.99) with measured flow corresponding to physiologic ranges from 3-12 l/min. For pulsatile flow in a water tank, a correlation of r = 0.86 with measured flow was obtained, whereas DPA estimates of cardiac outputs compared with Fick estimates in the 11 patients produced a correlation of r = 0.83. These data indicate that estimates of cardiac output are possible using the DPA approach.
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