I hope so! It's part of what cardiologists do for a living. Ejection fraction is the percentage change in ventricular volume in one beat. 55% or better is normal but >75% suggests a hyperdynamic state which may be physiologic or pathologic. Cardiac output is the volume of blood (in liters per minute) that the heart pumps. Co is the product of stroke volume (blood in ccs per beat) x the heart rate (bpm).
Related. Cardiac output is the amount of blood pumped out by heart in each minute (typically around five liters per minute). Ejection fraction is the fraction of blood that heart recieves in each heart beat that is pumped out (typically 55-65% being normal).
Definitions. Co is the quantity of blood the heart pumps. Specifically the liters per minute. It is a measure of cardiac function. Ef is the percent volume change of the left ventricle between full squeeze and relaxed. It is also a measure of function co is often measured in the can lab and ef by echocardiography.
Cardiac output. Stroke volume times heart rate equals cardiac output. Stroke volume relates to myocardial contractility, vascular resistance, vascular volume, anemia and metabolic state. There are subcomponents to all of these. Ejection fraction is a measure of contractility.
Units... Cardiac output is measured in liters per minute and is equal to stroke volume x heart rate. Ejection fraction is measure in %.
Would low cardiac output show up on an echo? I seem to have the symptoms but echo was fine. Cannot find ejection fraction listed, though.
Cardiac output. If the echo was "fine" then one assumes a normal ejection fraction; there is no generally accepted echo technique to estimate low cardiac output ;with a structurally normal heart it is highly unlikely in absence of other comorbidity to sustain a low CO stete.