CAE Healthcare Fidelis Lucina, User Manual

Page: 330 / 390

Müse Parameter Descriptions
302
Venous Return Resistance Factor
The Venous Return Resistance Factor parameter adjusts the resistance between the extrathoracic
and intrathoracic venous compartments. Raising the value increases the resistance, while lowering the
value decreases the resistance.
With less blood returning to the heart, there is a reduced volume entering the ventricles prior to
ventricular contraction. This results in a drop in the cardiac output and decrease in arterial blood
pressures. The heart rate increases due to feedback from the physiological control mechanisms in an
attempt to maintain adequate blood pressures.
Default : 1
Range : 0.10 - 100.00
Baroreceptor Gain (Overall) Factor
The Baroreceptor Gain (Overall) Factor parameter adjusts the influence of mean arterial pressure
(MAP) on heart rate, contractility, systemic vascular resistance and venous capacity. Use this parameter
to adjust how vigorously the heart and vasculature respond to blood pressure changes. The degree of
increase in heart rate or vascular response is influenced by the baroreceptor gain (overall) factor.
For example, when blood pressure falls, the heart rate increases, the arteries increase their vascular
tone (resistance) and there is less pooling of the blood in the venous system, all in an attempt to
maintain adequate blood pressure. A baroreceptor gain (overall) factor value of less than 1 corresponds
to baroreceptor depression. A baroreceptor gain (overall) factor value greater than 1 leads to a stronger
response to MAP changes.
Default : 1
Range : 0.00 - 100.00
Baroreceptor Gain (Cardiac) Factor
The Baroreceptor Gain (Cardiac) Factor parameter selectively adjusts the influence of mean arterial
pressure (MAP) on the heart rate and contractility, influencing how much the heart rate increases or
decreases with changes in blood pressure. Use this parameter to adjust how vigorously the heart
responds to blood pressure changes.
A baroreceptor gain (cardiac) factor of less than 1 corresponds to baroreflex depression (e.g., less heart
rate response to MAP changes). A value greater than 1 leads to a stronger response to MAP changes.
Default : 1
Range : 0.00 - 10.00