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Flashcards in Rate Deck (16):
1

When reading an EKG you should first consider the

Rate

2

Sinus rhythm

60-100 bpm

3

Sinus bradycardia

Rate less than 60 bpm

4

Sinus tachycardia

Rate more than 100 bpm

5

Automaticity foci

SA node, AV junction, Ventricles

6

Junction foci inherent rate

40-60

7

Ventricular foci inherent rate

20-40 beats per min

8

Rapid automaticity suppresses slower automaticity this is called

Overdrive suppression

9

An automaticity focus only emerges to function as a pacemaker when it is no longer

Overdrive suppressed

10

If SA node pacing failed, what can take over the active pacemaking responsibilty at its inherent rate of 60-80 bpm

An alternate atrial automaticity focus

11

An automaticity focus in the AV junction begins active backup pacing only

In the absence of pacing stimuli coming down from the atria

12

Because the AV node is the only conduction link between the atria and the ventricular conduction system, a complete block of the proximal AV node

Blocks all pacing stimuli from atrial automaticity focus

13

In an emergency, an irritable focus may suddenly discharge at a rapid rate of

150-250 bpm, this is the same for all foci

14

An R on a heavy black line is known as the start line, the dark lines after that are called the

300, 150, 100, 75, 60, 50

15

The distance between the heavy black lines represents

1/300th

16

To determine heart rate based on 3 second marks

Take the number of complete R intervals within 6 seconds and times by 10