Answer and Explanation 15

15.   C is the correct answer.  There is Atrial and Ventricular Disassociation.  The P waves and the QRS complexes march out equally so this is a Third Degree AV block. Second Degree Type Two is when the QRS complex drops off every so often but not consistently with no prolonged PR interval.  This is not atrial tachycardia.

Question 15

15.  Please interpret the EKG strip below:

A.  Atrial Tachycardia

B.  Second Degree Type 2 AV block

C.  Third Degree AV Block

D.  Slow A Flutter

Answer and Explanation 14

14.  B is the correct answer.  This EKG strip shows the P wave (the pacemaker) wandering around in different positions.  The PR interval is not consistently long so it is not a first degree AV block.  Junctional rhythm shows P waves inverted occur before, during or after the QRS complex.  There are no PVC's

Question 14

14.  Please interpret the EKG strip below:

A.  First Degree AV Block

B.  Wandering Atrial Pacemaker

C.  Junctional Rhythm

D.  Premature Ventricular Contractions

Answer and Explanation 13

13.  B is the correct answer.  These EKG changes are consistent with digoxin toxicity.  With digoxin toxicity many changes can occur:  ST depression and T wave inversion in V5 and V6 in a reversed tick pattern, prolonger PR interval, shortened QT, heart block, and bigeminy.  This patient has no delta waves.  The P waves and the QRS complex are not dissociated so the patient does not have a third degree block.

Question 13

13.  Please interpret the EKG below:

A.  Right Ventricular Hypertrophy

B.  Digoxin Toxicity

C.  Wolf Parkinson White Syndrome

D.  Third Degree AV Block

Answer and Explanation 12

12.  C is the correct answer.  Left Ventricular Hypertrophy has many different criteria.  The criterion for LVH are as follows:  S wave in V1 plus R wave in V5 or V6 >35 mm, S wave V3 plus R in AVL > 28 mm in men, and >20 mm in females, R wave in AVL > 11 mm, R wave V4-V6 >25 mm, S wave V1-V3 >25 mm, S wave V1 or V2 plus R wave in V5 or  V6 greater than 35 mmm or an R wave in lead I plus a S wave in lead III greater than 25 mm.  This is not pericarditis because there is no diffuse ST elevation.