Electrocardiography

Question 1

where is conductance in the heart slowed down to allow atria to contract before the ventricles?

Answer 1

AV node

Question 2

what does the P wave indicate?

Answer 2

atrial depolarization

Question 3

what is the PR interval?

Answer 3

conduction time (the slowing of the AV node to let atria fire)

Question 4

what occurs during the QRS complex?

Answer 4

ventricular depolarization and atria repolarization

Question 5

is it okay to continue PT after a PVC?

Answer 5

after one yes, any more stop and ask for assistance

Question 6

what does st elevation indicate?

Answer 6

MI

Question 7

what does ST depression indicate?

Answer 7

cardiac ischemia

Question 8

what must the HR be below for sinus bradycardia?

Answer 8

60 BPM

Question 9

what must the HR be over for for sinus tachycardia?

Answer 9

150 BPM

Question 10

what is the difference between atrial fibrillation and atrial flutter?

Answer 10

atrial fibrillation is inconsistent while atrial flutter is regular

Question 11

are atrial or ventricular dysrhythmias more life threatening?

Answer 11

ventricular

Question 12

what should you do if a pts ecg indicates VTAC?

Answer 12

cease activity and notify physician

Question 13

will a patient undergoing VTAC always show symptoms?

Answer 13

no

Question 14

will a patient undergoing VFIB always show symptoms

Answer 14

they will be unconscious and have no circulation

Question 15

what should you do if a pts ecg indicates VFIB?

Answer 15

immediate code, CPR and defib