-Adrenergic blocking agents, such as propranolol, can cause: ...

[burton19126]

-Adrenergic blocking agents, such as propranolol, can cause:
 
  a. sinoatrial block. c. sinus bradycardia.
  b. sinus tachycardia. d. premature atrial beats.

Question 2

What is the cardiac rhythm depicted on the following electrocardiogram?
 
  a. Atrial fibrillation c. Paroxysmal atrial tachycardia
  b. Premature atrial beats d. Premature ventricu-lar contractions

[tranoy]

Answer to Question 1

ANS: C
-Adrenergic blocking agents block stimulation by the sympathetic nervous system, causing the heart to slow down its rate. This can lead to sinus bradycardia.

Answer to Question 2

ANS: A
Atrial fibrillation is characterized by gross irregularities in both atrial and ventricular depolariza-tion. The P waves have been replaced by fibrillatory waves, which have caused an undulation of the baseline. Not every atrial depolarization has been transmitted by the atrioventricular node.