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NUR 426 Dysrhythmias Exam Questions And Answers
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NUR 426 Dysrhythmias Exam QuestionsAnd Answers
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, NUR 426 Dysrhythmias Exam Questions
And Answers
what is the electrical conduction through the heart?
sinoatrial node, intraatrial pathway, internodal pathway, AV node, bundle of His, left
and right bundle branch, purkinje fibers
what is a normal SA node rate?
60-100Brainpower
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what is a normal AV node rate?
40-60
what is a normal ventricular rate?
20-40
what is a dysrhythmia/arrhythmia?
any deviation from the normal rhythm of the heart
what are the 4 specialized characteristics of the heart?
automaticity, contractility, excitability, conductivity
what are S/S of decreased CO?
cap refill slow, clammy, pallor, weak pulses, cold extremities, altered level of
consciousness, SOB, tachypneic
what is the equation for CO?
SV x HR
what is the heart controlled by?
autonomic nervous system; fight or flight
what nerve can activate the parasympathetic nervous system?
vagus nerve
what is an ECG?
graphic tracing of electrical activity in the heart
how many wires are on an ECG?
10! there are 12 LEADS
what is the isoelectric line?
baseline; a straight line when electrical activity is not changing
what is happening during the P wave?
atrial depolarization
what is happening during the QRS complex?
ventricular depolarization
what is happening during the T wave?
ventricular repolarization
what is excitability?
property of heart tissue that allows it to be depolarized by a stimulus
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