Answer and Explanation 20

20. B is the correct answer.  ST depression occurs with posterior wall MI rather than elevation.  We see it in septal and anterior leads (V1-V4).  This occurs because the pathology is on the posterior portion of the heart and the leads or on the anterior chest.  There is no ST changes in the inferior leads (Leads II, III, and AVF).

Question 20

20.  Please interpret the EKG below:

A.  Inferior Ischemia

B.  Posterior Wall MI

C.  Septal MI

D.  Anterior MI

Answer and Explanation 19

19. B is the correct answer.  There is lengthening of the PR interval and a QRS complex drops off.  With second degree type 2 there is no prolongation of the PR interval.  There is no regularity of the P waves or the QRS complexes like you would see with third degree AV block.  This is not wandering atrial pacemaker.

Question 19

19.  Please interpret the EKG strip below:

A.  Third Degree Block

B.  Second Degree Type 1 AV Block

C.  Second Degree Type 2 AV Block

D.  Wandering Atrial Pacemaker

Answer and Explanation 18

18.  C is the correct answer.  Defibrillation is the patients best chance of survival.  Amiodarone and Lidocaine are anti-arrythmics both used in the ACLS protocol for ventricular fibrillation.  If the patient does not quickly recover from this they will need to be intubated.

Question 18

18.  What is the most important therapeutic intervention in the strip listed below?

 
A.  Intubation

B.  Amiodarone

C.  Defibrillation

D.  Lidocaine

Answer and Explanation 17

17.   B is the correct answer.  There is no ST depression in the inferior leads (II, III, and AVF) but elevation.  Pericarditis shows diffuse ST elevation but throughout and this is not present either.  There is no infarction in the lateral leads either (Leads I, AVL, V5, and V6) We do see reciprocal changes though for an inferior wall MI.