Adult Health II: Cardiac (Dysrhythmias) Exam Questions With Verified Answers
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Course
Dysrhythmias
Institution
Dysrhythmias
Adult Health II: Cardiac (Dysrhythmias)
Exam Questions With Verified Answers
Why we can have premature beats that arise from the atrium, or pre mature beasts that arise form
ventricles, v fib from - answerexcitability
ability to receive and respond to stimuli - answerexcitability
The ability o...
EXAM STUDY MATERIALS July 23, 2024 4:26 PM Adult Health II: Cardiac (Dysrhythmias) Exam Questions With Verified Answer s Why we can have premature beats that arise from the atrium, or pre mature beasts that arise form ventricles, v fib from - answer✔✔excitability ability to receive and respond to stimuli - answer✔✔excitability The ability of the heart to generate and conduct electrical impulses on its own. - answer✔✔automaticity transmit electrical impulse across cell membr anes cell to cell - answer✔✔conductivity The strength of contraction of the heart at any given end -diastolic volume - answer✔✔contractility where is the normal pacemaker of the heart? - answer✔✔SA node what is the normal firing rate of the SA node? - answe r✔✔60-100 times per minute when the SA node is firing that is indicated by a ___ wave - answer✔✔P this node holds the impulse for just a millisecond - answer✔✔AV node what is the normal pathway of an impulse?? starts with .. - answer✔✔SA node then intertri bal pathways then AV node into bundle of his and into the purkinje fibers what is the fire rate of AV junction? - answer✔✔40 to 60 what is the fire rate of perkinje fibers? - answer✔✔20-40 the parasympathetic is controlled by the _________ nerve - answer✔✔vagus the parasympathetic nervous system ________ rate of SA node and _______ impulse conduction of AV node - answer✔✔decreases slows the sympathetic nervous system _________ rate of SA no de, _________ impulse conduction of AV node, and ___________ cardiac contractility - answer✔✔increases; increases; increases what happens to someone's heart rate called vagal response?? - answer✔✔decreases it down EXAM STUDY MATERIALS July 23, 2024 4:26 PM if someone passes out having a bowel movem ent asking pt to cough what nerve is responsible is this?? - answer✔✔vagus nerve what is the last restrt pacemaker of the heart?? - answer✔✔purkinje fibers 20 -40 bpm what is the back up pacemaker of the heart? - answer✔✔AV node 40 -60 bpm ECG represents how impulse moves across __________ - answer✔✔myocardial cells how can we look at impulse transmission from different angles? - answer✔✔with leads you need to see exactly what the rhythm is what type of leads should you use?? - answer✔✔12 leads 3 lead or 5 le ad is usually used for - answer✔✔telemetry monitoring if you do a 12 lead on a patient and see ST segment elevation and two or more continuous leads this mens - answer✔✔they are having an acute coronary syndrome they need to go to cath lab!!!!! this wave r epresents atrial depolarization - answer✔✔P wave this interval represents atrial depolarization and conduction through the AV node time where AV junction grabs impulse and holds it for a second to let atria contract to let blood get into ventricles - answe r✔✔P-R interval what is the normal length of a PR interval?? - answer✔✔.12-.20 seconds (no more than 5 small blocks on the EKG paper) what if the PR interval is over .20 seconds what is this indicative of or if it varies?? - answer✔✔a heart block if P wave is inverted in lead 2 is it sinus or junctional rhythm? - answer✔✔junctional if inverted; if not then it's sinus what's the normal length of QRS complex?? - answer✔✔.12 (no more than 3 small blocks on EKG paper) what if you have a QRS complex greater than .12 (wider) or rabbit ears? - answer✔✔means a bundle branch block this represents ventricular depolarization - answer✔✔QRS complex this is the period between depolarization and repolarization - answer✔✔ST segment if you have a depressed ST segment what is this indicative of??? - answer✔✔hypoxia (person has a little bit of hypoxia and need oxygen) EXAM STUDY MATERIALS July 23, 2024 4:26 PM if you have an elevated ST segment what is this indicative of?? - answer✔✔an MI this represents ventricular repolarization - answer✔✔T wave this represents ventri cular depolarization and repolarization - answer✔✔QT interval if a QT interval is prolonged what is this indicative of?? - answer✔✔meds prolong them patients more at risk for having cardiac issues if they have this could result in sudden cardiac death How long should a QT interval be?? - answer✔✔.36-.44 seconds This is the time between two ventricular depolarizations (helps determine rate of rhythm helps determine if rhythm is regular or irregular) - answer✔✔R-R interval Normal QRS complex time - answer✔✔0.12 seconds or less (want it to be less than 3 small blocks) this is a very small wave past the T wave what is this little wave indicative of? - answer✔✔it's called a U wave and you see it in patient's who are cold or hyp othermic (late ventricular repolarization) one big block with 5 little blocks is equal to what? - answer✔✔20 each little block on an EKG represents what?? - answer✔✔4 Lead II, III, aVF - answer✔✔Reflect inferior wall of heart in EKG (let's you see ST segme nt elevation best and let's you know if person is having an MI) SD is a 45 yo woman, comes to the ED complaining of sudden onset of palpitations and shortness of breath. You need to obtain a 12 lead EKG and put her on telemetry. Describe the appropriate location to apply the leads for 5 lead tele and the 12 lead EKG - answer✔✔refer to drawing :) white on the right, smoke over fire, pickles on the left to calculate heart rate count number of ___ waves in a 6 second strip and multiply it by 10 - answer✔✔R waves x 10 = ur heart rate how do you tell if the atrial rate and rhythm are regular or irregular? - answer✔✔look at the R to R interval if you have more P waves than QRS's then what does this indicate? - answer✔✔a heart block Assessment of cardiac rhythm :
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