ventricular rhythms Flashcards
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
c. torsades de pointes
The heart ventricle with the thickest myocardium is the:
Select one:
a. right
b. left
b. left
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
d. 20-40
PEA, a life-threatening dysrhythmia, may result from:
Select one:
a. hypokalemia
b. hypomagnesemia
c. tricyclic antidepressant drug overdose
d. all of the above
d. all of the above
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. true
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
c. A-fib
PVC’s characteristically have a __________________ pause.
Select one:
a. noncompensatory
b. uncompensatory
c. compensatory
d. 0.30 seconds
c. compensatory
The coronary arteries receive oxygenated blood from the:
Select one:
a. aorta
b. coronary arteries
c. pulmonary veins
d. pulmonary arteries
a. aorta
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. ventricular depolarization
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
c. two
The neurotransmitter for the parasympathetic nervous system is acetylcholine. Release of acetylcholine:
- slows the heart rate
- increases the heart rate
- slows atrioventricular conduction
- increases atrioventricular conduction
Select one:
a. 1 and 3
b. 2 and 3
c. 3 and 4
d. 1 and 4
a. 1 and 3
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. true
Oscilloscopic evidence of ventricular fibrillation can be mimicked by artifact.
Select one:
a. true
b. false
a. true
Ventricular diastole refers to ventricular:
Select one:
a. contraction
b. relaxation
c. systole
d. pressure ratio
b. relaxation
The QRS interval should normally be _________ seconds or smaller.
Select one:
a. 0.20
b. 0.12
c. 0.18
d. 0.36
b. 0.12
