ventricular rhythms Flashcards

1
Q

This rhythm resembles a turning about or twisting motion along the baseline (isoelectric line)

Select one:

a. ventricular tachycardia
b. ventricular asystole
c. torsades de pointes
d. pulseless electrical activity

A

c. torsades de pointes

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2
Q

The heart ventricle with the thickest myocardium is the:

Select one:

a. right
b. left

A

b. left

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3
Q

Pacemaker cells found in the Purkinje network in the ventricles have an intrinsic firing rate of ________BPM.

Select one:

a. 20-30
b. 60-80
c. 40-60
d. 20-40

A

d. 20-40

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4
Q

PEA, a life-threatening dysrhythmia, may result from:

Select one:

a. hypokalemia
b. hypomagnesemia
c. tricyclic antidepressant drug overdose
d. all of the above

A

d. all of the above

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5
Q

The most notable characteristics of asystole is the total absence of waveforms on an EKG strip or cardiac monitor.

Select one:

a. true
b. false

A

a. true

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6
Q

Atrial activity is not discerned on an EKG strip in all of the following rhythms except:

Select one:

a. IVR
b. AIVR
c. A-fib
d. V-tach

A

c. A-fib

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7
Q

PVC’s characteristically have a __________________ pause.

Select one:

a. noncompensatory
b. uncompensatory
c. compensatory
d. 0.30 seconds

A

c. compensatory

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8
Q

The coronary arteries receive oxygenated blood from the:

Select one:

a. aorta
b. coronary arteries
c. pulmonary veins
d. pulmonary arteries

A

a. aorta

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9
Q

The QRS complex corresponds to what electrical activity in the heart?

Select one:

a. ventricular depolarization
b. atrial depolarization
c. ventricular contraction
d. atrial contraction

A

a. ventricular depolarization

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10
Q

It may be difficult to distinguish asystole from very fine V-fib; therefore, you must always check ______________ different leads in order to definitively identify asystole.

Select one:

a. four
b. three
c. two
d. five

A

c. two

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11
Q

The neurotransmitter for the parasympathetic nervous system is acetylcholine. Release of acetylcholine:

  1. slows the heart rate
  2. increases the heart rate
  3. slows atrioventricular conduction
  4. increases atrioventricular conduction

Select one:

a. 1 and 3
b. 2 and 3
c. 3 and 4
d. 1 and 4

A

a. 1 and 3

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12
Q

PEA is not an actual rhythm; rather, it represents a clinical condition wherin the patient is clinically dead, despite the fact that some type of organized rhythm appears on the monitor.

Select one:

a. true
b. false

A

a. true

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13
Q

Oscilloscopic evidence of ventricular fibrillation can be mimicked by artifact.

Select one:

a. true
b. false

A

a. true

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14
Q

Ventricular diastole refers to ventricular:

Select one:

a. contraction
b. relaxation
c. systole
d. pressure ratio

A

b. relaxation

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15
Q

The QRS interval should normally be _________ seconds or smaller.

Select one:

a. 0.20
b. 0.12
c. 0.18
d. 0.36

A

b. 0.12

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