Cardiac Flashcards
Pulmonary artery carries what blood?
Deoxygenated blood to the lungs where it becomes oxygenated
The pulmonary veins carry what blood?
Oxygenated blood that goes to L. Atrium
What is preload?
The amount of blood returning to the R. side of the heart and the muscle stretch that the volume causes
What happens when we have the stretch with preload?
ANP is released (excrete Na and H20)
What is after load?
The pressure in the aorta and peripheral arteries that the L. ventricle pumps against to get blood out
What is the pressure from after load referred to as?
Resistance
Afterload
With HTN there is more or less resistance?
More!
Thats why HTN can lead to HF and pulmonary edema, bc high after load decreases CO and forward flow, as well as wears your heart out
What is stroke volume?
The amount of blood pumped out of the ventricles with each beat
CO = ___ X ____
HR x SV
Cardiac output
What is dependent on an adequate CO?
Tissue perfusion
Cardiac output
CO chances according to the ___
Body needs
Factors that affect CO (3)?
HR and certain arrhythmias
BV
Decrease in contractility
Factors that affect CO
What about BV?
Less volume = less CO
More volume = more CO
Factors that affect CO
What about decrease in contractility?
MI, meds, cardiac muscle disease can cause
Preload, after load, contractility, rate, rhythm
ACE inhibitors (-prils)
Afterload
Preload, after load, contractility, rate, rhythm
Milrone
Improve contractility
*this is an inotrope