EKG Quiz 3

Question 1

Define “torsades de pointes”

Answer 1

french for “twisting of points”

represents ventricular tachycardia that oscillates and rotates around the axis on an EKG

Question 2

Define IVR

Answer 2

AKA idioventricular rhythm is a rhythm originating in the ventricle at its inherent rate; higher pacemakers have failed so the ventricle escapes to save the patient’s life

Rate is between 20-40bpm

Question 3

What is “Wenckebach” also known as?

Answer 3

Wenckebach is aka a type I second-degree AV block

Question 4

Define trigeminy

Answer 4

every 3rd beat is abnormal

Question 5

Define usurpation

Answer 5

act of a lower pacemaker stealing control from the predominant pacemaker; results in a faster heart rate

Question 6

Be able to count the seconds in a QRS Complex

Answer 6

1 box equates to 0.04 seconds

Question 7

Define tachycardia

Answer 7

fast heart rate; over 100bpm

Question 8

Know the 3 degrees of AV block & the characteristics of its P waves

Answer 8

First-degree AV block: least dangerous type of AV block; there’s a delay in impulse transmission from sinus node to the ventricles, but every impulse still gets there, just takes longer

P waves: upright, matching; ONE P TO EACH QRS COMPLEX

Second-degree AV block: some impulse from the sinus node gets through to the ventricles, some do not

P waves: all Ps except the blocked P are folllowed by a QRS; find 2 consecutive P waves adn the rest after should have the same P-P interval

Third-degree AV block: none of the impulses from the sinus node get through to the ventricles

P waves: not associated with QRS complex but should have regular P-P intervals

Question 9

Be able to count the seconds in a PR interval

Answer 9

PR interval is the interval between a P wave and a QRS complex; these intervals can be consistent or can vary