Talk:Cardiac output

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Please fix the equation.—Preceding unsigned comment added by 210.54.84.118 (talk • contribs) 01:32, 4 September 2007

Cardiac Output (CO) considered as Q is a close literal and mathematical description of Ejection Fraction (EF) and Systole. Q is well reasoned as a mathematical model of global cardiac performance. Q as a mathematical proxy of systole readily applies to terms first defined by Adolph Fick. Q as an overall index of myocardial performance deserves further reconsideration in phase/terms of systole and diastole. Systole/Ejection Fraction/Cardiac Output has another half deserving of mathematical and echocardiographic definition defined as Diastole/Injection Fraction/Cardiac Input. Clinical evidence of Q as Ejection Fraction is a reliable indicator of burden of systolic heart failure. Given inexpensive echocardiographic rendering, EF is readily equal to the difference between End Systolic Volume and End Diastolic Volume (EF=ESV/EDV). Burden of diastolic heart failure may be readily appreciated in simple inversion of terms (with no technology or licensing issues) as Injection Fraction. IF = EDV/ESV. Diastolic heart failure (decline of injection fraction) is perhaps better described as negative Windkessel physiology.--Lbeben (talk) 03:14, 11 February 2008 (UTC)

[edit] Darcy's Law?

In the Cardiac Output and Vascular Resistance section, how is Darcy's Law used? Temporaluser (talk) 06:42, 19 March 2008 (UTC)

[edit] Measuring O₂ uptake

The statement of oxygen consumptions being difficult to measure accurately is vague and not true. First, what is meant by "difficult" and "accurate"?? These are weasel words if there ever were any. Further, oxygen uptake is routinely measured by automated systems in research/clinical laboratories, with the "accuracy" of most systems having been validated by the individual companies (info typically available on their websites) or research investigators (reports in the literature). —Preceding unsigned comment added by 138.88.163.79 (talk) 21:21, 19 March 2008 (UTC)