Cardiac Ouput and Blood Flow in Muscle Tissues Flashcards
The cardiac index increases till age ____ and then decreases till when
10, death
The decline of cardiac index after age ten is indicative of what
Decline and muscle mass/activity with age
When you are exercising cardiac output increases along with what
Oxygen consumption
What is the equation for the flick principle
Cardiac ouput= Oxygen consumption/ (oxygen pulmonary vein- oxygen in pulmonary artery)
To measure the pulmonary vein oxygen concentration you use
The systemic arterial blood Oxygen concentration
How do you measure the oxygen concentration in the pulmonary artery you use what
Systemic venous oxygen concentration
What is the determining factor that controls how much blood the heart pumps out
The heart is a “demand” pump
the heart pumps out whatever blood comes back into it from the venous system
The amount of blood returned determines how much is pumped out
The cardiovascular system consists of ____ pumps and ____ circuits connected in series
two and two
Definition of cardiac index
Cardiac output per square meter of body surface
Because the two “circuits” of the cardiovascularsystem are connected in series
flow must be equal between them
cardiac output and rate of the two circuits are equal
All pressures are higher in the systemic circuit
Chemical composition of pulmonary venous blood is similar to that of systemic arterial blood
Chemical composition of venous blood entering the right atrium is the same as the composition of pulmonary arterial blood
What 4 factors directly affect cardiac output
- Basic level of body metabolism
- Whether the person is exercising
- Age
- Size of the body
Normal cardiac output values for a healthy young male
5.6 L/min
Normal Cardiac output for a woman
4.9 L/min
Normal Cardiac output for a resting adult
5.0 L/min
