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CC Self Assessments
Terms in this set (28)
During systole, the ________ and _________ valves are open and the __________ and __________ are closed.
-pulmonic and aortic valves (open)
-tricuspid and mitral valves (closed)
During diastole, the __________ and _________ valves are open and the ________ and _________ are closed.
-tricuspid and mitral valves (open)
-pulmonic and aortic valves (closed)
Atrial contraction is referred to as atrial _________ and is responsible for adding as much as a ______% contribution to EDV and cardiac output
The left ventricle never ejects the entire volume it receives during systole. The portion of blood the left ventricle ejects during systole is referred to as the ______ _______.
_______ amount is normally ejected?
Preload is the volume of blood that is in the ventricle just before ejection. Preload is also referred to as the _______ _______ _______ _______ volume.
left ventricular end-diastolic volume (LVEDV)
A normal preload volume is approximately ______ mL?
What is the formula for calculating MAP?
MAP = SBP + 2(DBP)/3
At what MAP is perfusion to vital organs compromised?
MAP <70 perfusion can be impaired.
Define SVR and factors that would increase or decrease SVR.
-SVR = systemic vascular resistance or AKA "Afterload"
-Vasoconstriction increases SVR
-Vasodilation decreases SVR
Define Preload. What conditions/factors affect preload?
Preload affected by venous return and wall stretch as per the Frank Starling Law of the heart. Preload indicators are RAP and PAWP
Afterload is the impedance or oppositon to the ventricle ejecting its contents. There is a normal afterload pressure for the right and left ventricles
What conditions/factors affect afterload?
Afterload is affected by vascular resistance (PVR or SVR)
Holding heart rate constant, what effect will increasing the stroke volume have on the cardiac output?
increase the CO
Holding SV constant what is the effect of decreased HR on CO?
decrease the CO
Define contractility and what factors influence it
Contractilty is the force of contraction. The EF, CO, SV all assess contractilty. The EC calicium level is the ion that primarily affects myocardial contractilty
PAWP means __________ _________ _________ _________.
pulmonary artery wedge (occlusive) pressure
PAWP reflects LVED pressure under normal conditions?
Describe how the PA catheter advances through the heart
When the balloon of the PA catheter is inflated the catheter "floats" more distally in the pulmonary artery until it wedges into a smaller tributary. The end on the catheter then senses pressure from the left side of the heart
What does "getting a wedge pressure" mean
When the mitral valve is open a LVEDP or LV preload value is obtained
What are 2 other names used for PA catheter insertions?
Swan Ganz catheter insertion and right heart catherization
Chest tubes are placed in the mediastinum during cardiac surgery. What is true in relationship to care of a patient with this type of chest tube drain?
Drainage from the mediastinum can be collected and re-transfused to the patient during the early post-op period.
Positive pressure in the pleural space
results in lung collapse
Bubbling in water seal chamber =
air entering into the system
Tidalling in water seal chamber =
intrapleural pressure changes
No movement in water seal chamber =
lung fully inflated
Reservoir for drainage of blood, pus, pleural or lymph fluid
Acts as a one-way valve (allows air out but not in)
water seal chamber
Regulates the amount of negative pressure in wet and dry chest drainage systems.
suction control chamber
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