For which of the following arrhythmias would an electronic ...

[fox]

For which of the following arrhythmias would an electronic pacemaker be indicated?
 
  a. First-degree block
  b. Sinus tachycardia
  c. Third-degree block
  d. Ventricular fibrillation

Question 2

On inspection of an ECG rhythm strip from an adult patient, you notice the following: regular sawtooth-like waves occurring at a rate of 280/min and a regular ventricular rhythm occurring at a rate of approximately 140/min.
 
  What is the most likely interpretation?
  a. Atrial fibrillation
  b. Atrial flutter
  c. Ventricular tachycardia
  d. Ventricular fibrillation

[tdewitt]

Answer to Question 1

ANS: C
In almost all cases, treatment usually includes medication to speed up the ventricles and a tem-porary external pacemaker until a permanent pacemaker can be surgically placed.

Answer to Question 2

ANS: B
Atrial flutter is the rapid depolarization of the atria resulting from an ectopic focus that depolar-izes at a rate of 250 to 350 times/min. Typically, only one ectopic focus is causing the arrhythmia, which results in each P wave appearing similar. The result is a characteristic sawtooth pattern.