Author Question: A 77-year-old woman is complaining of a sudden onset of palpitations. The cardiac monitor reveals ... (Read 69 times)

WWatsford · **on:** Jun 25, 2018

A 77-year-old woman is complaining of a sudden onset of palpitations. The cardiac monitor reveals atrial fibrillation with a ventricular response of 144 to 210 beats/min while the patient is at rest.

In this situation, the ventricular rate associated with this rhythm is considered to be _____.
a. controlled
b. uncontrolled

Question 2

To determine whether the ventricular rhythm on an ECG tracing is regular or irregular, compare _____ intervals.

a. PR
b. R to R
c. TP
d. P to P

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

Answer to Question 1

B
Atrial flutter or atrial fibrillation that has a ventricular rate of less than 100 beats/min is described as controlled. A controlled ventricular rate may be the result of a healthy AV node protecting the ventricles from very fast atrial impulses or medications used to control (block) conduction through the AV node, decreasing the number of impulses reaching the ventricles.

Answer to Question 2

B
To evaluate the rhythmicity of the ventricular rhythm on a rhythm strip, the interval between two consecutive R waves is measured. The distance between succeeding R-R intervals is measured and compared. If the ventricular rhythm is regular, the R-R intervals will measure the same.