NUR 347 Dysrhythmias
- What is depolarization of cardiac cells?
Answer
Contraction
- What is repolarization in cardiac cells?
Answer
relaxation
- What is clinical significance?
Answer
it means you need to do a really good evaluation of the patient
- T or F the patient should be treated and not the rhythm?
Answer
TRUE
- What are some clinical sx of decreased cardiac output?
Answer
-decreased BP
-Decrease O2 sat 1 / 4
-dizziness -syncope -palpitations -cold and clammy skin -diaphoresis -pallor -restlessness -weakness -fatigue -chest or arm pain, numbness or tingling of arms -feeling of impending doom
- What is the pathway of impulse transmission in the heart?
Answer
SA>AV>bundle of his> down bundle of branches and out purkinje fibers
- What do dysrhythmias result from?
Answer
disorders of impulse formation, conduc- tion of impulses, or both.
- What is the fxn of the SA node?
Answer
pace maker
- What is the intrinsic HR of the SA node?
Answer
60-100 2 / 4
- If the HR is over 60 this means the origin is most likely in the?
Answer
SA node
- What is the AV node?
Answer
the back up of the pacemaker
- What is the intrinsic HR of the AV node?
Answer
40-60
- What are the ventricles?
Answer
the back up of the back up
- What is the intrinsic HR of the ventricles?
Answer
20-45, usually not good
- What does the P wave represent?
Answer
atrial depolarization and correlates with atrial contraction 3 / 4
- What does the PR interval represent?
Answer
atrial depolarization + a delay in the AV junction
- What does the delay in the PR interval allow?
Answer
allows the atria to contract first
- What does the QRS represent?
Answer
ventricular depolarization, correlates with ventricular contraction
- What does the T wave represent?
Answer
ventricular repolarization, correlates with ventricular relaxation
- What does one small box on a horizontal ECG paper measure as?
Answer
0.04s
- What does one large box on a horizontal ECG paper measure as?
- / 4
Answer