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12 Cards in this Set

  • Front
  • Back
What is the normal range for the duration of the PR interval in an EKG?
120 - 200 ms
What is the normal duration of the QRS complex in an EKG?
80 - 120 ms
What is Wolfe-Parkinson-White Syndrome?
Abnormal EKG pattern where the PR interval is small due to the signal bypassing the AV node via the bundle of Kent
How would one differentiate between a premature ventricular and atrial contraction on an EKG?
PVCs have wide QRS complexes and PACs have similar looking QRS complexes
An EKG is performed on a patient that reveals an absence of P-waves and is not tachycardic. What type of rhythm does this patient exhibit?
How would one differentiate between sinus tachycardia and supraventricular tachycardia (SVT)?
P-waves are absence in SVT
What is the difference between a supraventricular and ventricular tachycardia on an EKG?
Ventricular tachycardias have wide QRS complexes
Patients with ventricular fibrillation or tachycardia are likely to present with what clinical findings?
They won't have a pulse and may be unconscious
Where is the pacemaker located in a junctional rhythm?
Just in front of the AV node
Where is the pacemaker located in an idioventricular rhythm?
Just behind the AV node into the ventricles, hence the widened QRS
What is a first degree heart block?
Prolonged PR interval
What is the difference between type I and II second degree heart blocks?
Type I has progressively increasing PR intervals followed by a dropped beat

Type II has fixed prolonged PR intervals with extra atrial contractions