Author Question: Atrial fibrillation is characterized by _____. a. one P wave before each QRS and a regular ... (Read 72 times)

soccerdreamer_17 · **on:** Jun 25, 2018

Atrial fibrillation is characterized by _____.

a. one P wave before each QRS and a regular ventricular rate of 60 to 100 beats/min
b. an erratic, wavy baseline and irregular ventricular rhythm
c. saw-tooth or picket-fenceshaped waveforms preceding each QRS
d. P waves occurring before, during, or after the QRS complex; when seen, they are inverted

Question 2

The most common type of supraventricular tachycardia (SVT) is _____.

a. atrial tachycardia
b. atrial flutter
c. AV reentrant tachycardia (AVRT)
d. AV nodal reentrant tachycardia (AVNRT)

momtoalll · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

B
Characteristics of atrial fibrillation:
Rhythm Ventricular rhythm usually irregularly irregular
Rate Atrial rate usually 400 to 600 beats/min; ventricular rate variable
P waves No identifiable P waves, fibrillatory waves present; erratic, wavy baseline
PR interval Not measurable
QRS duration 0.11 seconds or less unless abnormally conducted

Answer to Question 2

D
AVNRT is the most common type of SVT. It is caused by reentry in the area of the AV node.