NSG 460- Care of the Critically Ill patient-Cardiac exam questions with answers

NSG 460- Care of the Critically Ill patient-
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Cardiac exam questions with answers |\ |\ |\ |\




SA node - CORRECT ANSWERS ✔✔The electrical pacemaker of
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the heart
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AV node - CORRECT ANSWERS ✔✔relays electrical impulses from
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atria into ventricles
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What part of the PQRS represents atrial depolarization? -
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CORRECT ANSWERS ✔✔P wave |\ |\ |\




What is that standard PR interval? - CORRECT ANSWERS ✔✔0.12-
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0.20


How long is the standard QRS complex? - CORRECT ANSWERS
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✔✔0.08-0.10


What concerns us with arrhythmia? - CORRECT ANSWERS ✔✔We
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are concerned with their effect on the heart as a pump.
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Arrhythmias can mean the heart is beating too fast or slow for
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effective pumping or there is no pumping.
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What are concerns with Supraventricular tachycardia - CORRECT
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ANSWERS ✔✔It can tire the heart and contribute to inadequate
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filling of the heart.
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, What type of rhythm is associated with atrial fibrillation? -
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CORRECT ANSWERS ✔✔No p waves, irregularly regular |\ |\ |\ |\ |\ |\




How do we know if a person has a third degree heart block from
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a ECG? - CORRECT ANSWERS ✔✔If P's and Q's don't agree then
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we have third degree
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What rhythms are considered lethal rhythms? - CORRECT
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ANSWERS ✔✔Ventricle fibrillation and asystole |\ |\ |\ |\




What is the calculation for cardiac output? - CORRECT ANSWERS
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✔✔CO = stroke volume * heart rate
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What things affect stroke volume? - CORRECT ANSWERS
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✔✔preload, afterload, contractility |\ |\




What is preload? - CORRECT ANSWERS ✔✔the degree of stretch
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on the heart before it contracts
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What is afterload? - CORRECT ANSWERS ✔✔Pressure/resistance
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in aorta and peripheral arteries that left ventricle has to pump
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against to get blood out. |\ |\ |\ |\




What does CVP mean? - CORRECT ANSWERS ✔✔central venous
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pressure, pressure in the thoracic vena cava near the right
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atrium (used to assess a patients fluid volume status and cardiac
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function)
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