Answer 10

10.  Choice B is the correct answer.  With left axis deviation there is a positive deflection in lead I, and a negative deflection in lead avF.   A normal axis has positive deflections in leads I and avF.  Right axis deviation has a negative deflection in lead I, and a positive deflection in lead avF.  Extreme right axis deviation has negative deflections in leads I and and avF.

Question 10

10.  Please determine the axis on the EKG listed below:

A.  Normal Axis
B.  Left axis deviation
C.  Right axis deviation
D.  Extreme right axis deviation

Answer 9

9.  Choice D is the correct answer.  This patient has ST elevation in the inferior leads which are leads II, III, and avF.  Pericarditis usually has ST elevation in all leads.  The septal leads are leads V1 and V2 and there is no ST elevation there.  The lateral leads, leads I, avL, V5 and V6 have no ST elevation.

Question 9

9.  What is the diagnosis on the EKG listed below?

A.  Pericarditis

B.  Lateral Wall STEMI

C.  Septal Wall STEMI

D.  Inferior Wall STEMI

Answer 8

8.  Choice B is the correct answer.  A key characteristic with hyperkalemia is that the P wave is flattened, the QRS complex is widened, and the T waves are peaked.  This is contrasted with hypokalemia where the T waves become flattened and there can be a U wave.  Calcium affect the QT interval.  With hypercalcemia, the QT interval is shortened.  With hypocalcemia, the QT interval is prolonged.

Question 8

8.  Please identify the pathology listed below in the EKG:

A.  Hypokalemia
B.  Hyperkalemia
C.  Hypocalcemia
D.  Hypercalcemia

Answer 7

7.  Choice B is the correct answer.  A key characteristic of atrial fibrillation is that is an irregularly irregular rhythm.  Since the impulse is coming from multiple foci in the the atria there is a wavy irregular baseline.  This can be contrasted with atrial flutter that has only one ectopic focus in the atria, the baseline is sawtooth and regular.  Sinus arrhythmia is an irregular rhythm that varies with the patients respiration.  The difference is the P waves, QRS complex, and T waves vary with the patients respirations.  Sinus block is when the SA node quits pacing activity for one complete cycle.  The P waves are the same because the SA node is functioning before and after the pause.