Flashcards in Lecture 20: Lymph and Venous Circulation and Cardiac Output (Hayward) Deck (32):
resistance to inflow --> hydrostatic pressure in capillary
resistance to inflow --> absorption into capillary
increased blood volume --> capillary filtration
hypoproteinemia --> capillary reabsorption
low blood protein
where do lymph vessels converge and empty into?
lymph flow is via: (2)
1) muscle contraction
heart failure means
heart can't move blood forward
lymph dysfunction leads to
edema. Increased filtration pressure beyond the capacity of the lymphatics
3 main causes of lymph dysfunction
1) arteriole dilation
2) increased venous pressure
3) increased capillary permeability
does venous system have pulsatile activity?
right arterial pressure
venous return is dependent upon pressure gradient between 3 things
1) peripheral venous pressure
2) great veins
(Differences between peripheral and central venous pressure)
How does breathing modulate central venous pressure during inspiration?
Venous pressure drops, resulting in increased venous return
How does breathing modulate central venous pressure during expiration?
Venous pressure increases, resulting in decreased venous return
increased venous sympathetic activity --> peripheral venous pressure
increased blood volume --> peripheral venous pressure
increased skeletal muscle pump --> peripheral venous pressure
increased inspiratory movement --> peripheral venous pressure
increased peripheral venous pressure w/o changing central venous pressure--> venous return
increased central venous pressure --> cardiac filling
amount of blood flowing back to the heart
decreased preload --> cardiac output
increased central venous pressure --> preload
increased peripheral venous pressure --> atrial pressure
increased venous return --> end diastolic ventricular volume
increased peripheral venous pressure --> stroke volume
pronounced jugular pulses are associated with _____atrial pressure
If central venous pressure decreases, but contractility increases ---> cardiac output?
increases. Shifts cardiac-function curve to the left
expected cardiac output taking several variables into consideration including age, sex, temp, etc.