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Doppler echocardiographic measurement of cardiac output in man using mitral annulus method
Author(s) -
Shimamoto Hiroyuki,
Shimamoto Yoriko,
Kito Hiroyuki,
Kawazoe Kohei,
Fujita Tsuyoshi,
Okamoto Mitsunori
Publication year - 1992
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870200407
Subject(s) - parasternal line , medicine , doppler effect , cardiac output , cardiology , mitral annulus , inflow , doppler echocardiography , annulus (botany) , mitral valve , hemodynamics , diastole , mechanics , blood pressure , physics , materials science , astronomy , composite material
The mitral inflow method of measuring cardiac output with pulsed Doppler two‐dimensional echocardiography was developed and validated against the thermodilution technique in 42 patients. A mitral inflow method combined the velocity of left ventricular inflow at the mitral annulus (apical long‐axis view) with the cross‐sectional area of the annulus calculated from its diameter (parasternal long‐axis view). A good correlation was observed between thermodilution and Doppler measurements of cardiac output (r = 0.93). The ratio of Doppler measurements to thermodilution measurements will be between 0.76 and 1.15 for about 95% of cases. There was a good correlation between percentage change in thermal cardiac output and those in Doppler cardiac output (r = 0.95); the limits of agreement were −11.5% to 10.5%, suggesting that this method can be most useful for assessing relative changes in cardiac output.