Evaluation of Cardiac Output by Thoracic Electrical Bioimpedance during Exercise in Normal Subjects

CHEST Journal ◽  
1992 ◽  
Vol 102 (2) ◽  
pp. 448-455 ◽  
Author(s):  
Randy Moore ◽  
Raul Sansores ◽  
Vern Guimond ◽  
Raja Abboud
Keyword(s):  
Cardiac Output ◽  
Normal Subjects ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance

Multicenter trial of a new thoracic electrical bioimpedance device for cardiac output estimation

1994 ◽  
Vol 22 (12) ◽  
pp. 1907-1912 ◽  
Author(s):  
William C. Shoemaker ◽  
Charles C. J. Wo ◽  
Michael H. Bishop ◽  
Paul L. Appel ◽  
Joseph M. Van de Water ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Multicenter Trial ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance

Assessment of beat to beat changes in cardiac output during the Valsalva manoeuvre using electrical bioimpedance cardiography

1987 ◽  
Vol 72 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Stephen A. Smith ◽  
Mahmood M. Salih ◽  
William A. Littler
Keyword(s):  
Heart Rate ◽  
Cardiac Output ◽  
Normal Subjects ◽  
Valsalva Manoeuvre ◽  
Impedance Measurements ◽  
Electrical Bioimpedance ◽  
Valsalva's Manoeuvre ◽  
The Mean ◽  
Bioimpedance Cardiography ◽  
Cardiac Stroke Volume

1. Beat to beat changes in cardiac output during standardized Valsalva's manoeuvres were recorded using electrical bioimpedance cardiography in 13 normal subjects. 2. Cardiac output increased by 12 ± 5% after 1 s of straining solely because of an increase in heart rate. Subsequently, cardiac stroke volume and cardiac output fell during the strain to lows of − 40 ± 6% and − 21 ± 3% respectively at 15 s. 3. There was a sustained increased in cardiac output (maximum + 17 ± 4%) in the late post strain period. 4. The mean coefficient of variation in impedance measurements of cardiac output was 6.8% during all parts of Valsalva's manoeuvre, with no single value exceeding 10%.

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