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Cardiac Cycle
12 Lead EKG
Electrical Pathways
EKG Measurements
Heart Rhythms
100
This the first wave of activity in the cardiac cycle is called this.
What is a P wave
100

The first chest lead on the right side of the chest is called what?

What is V1

100
This node normally begins or paces the electrical activity located in the atrias
What is Sino Atrial Node (SA Node).
100

One small square on the EKG paper represents what fractional measurement?

What is .04 seconds.

100
What is the name of the rhythm used for a normal EKG.
What is Normal Sinus Rhythm.
200
This wave follows the QRS complex.
What is a T wave
200

This lead represents the electrical activity recorded from the left arm to the right arm.

What is lead I

200
These nerves transfers electrical activity from the AV Node to the myocardium of the Ventricles
What is Bundle of His
200

One large square represents what fractional measurement?

What is .20 Seconds

200
A slow heart rate of less than 50 would be called
What is Bradycardia
300
This complex follows the P wave.
What is the QRS complex
300
This lead represents electrical activity from the right arm to the left leg.
What is lead II
300

These nerves deliver electricity from the SA Node into the myocardium of the atria.

What are the Internodal pathways

300

When measuring an estimated heart rate, you measure the number of heavy lines between these two points.

What is "R to R"

300
A rhythm of greater than 100 would be called
What is Tachycardia
400
This part of the Cardiac Cycle represents the beginning of atrial contraction to the beginning of ventricular contraction
What is PR interval
400

This lead represents electrical activity collected from the left arm and left leg and directed toward the right arm.

What is aVR

400

This node receives electrical activity from the inter-nodal pathways of the atria and delivers it into the Bundle of His.

What is the AV Node

400
Normal QT interval should be less than this fractional measurment.
What is .40 seconds
400
When the distance between R waves are not the same distance throughout EKG tracing, the rhythm would be called what type of rhythm.
What is an irregular rhythm.
500
This segment represents the end of the QRS complex to the beginning of the T wave
What is ST segment
500
This lead represents electrical activity from the Right Arm to the Left Leg.
What is Lead II
500

This bundle of nerves located in the top right of the right atrium is also know as the hearts natural pacemaker

What is the SA node

500
If the QRS complex is 2 small squares in length, the measurement will equal what?
What is .08 seconds
500
This rhythm is shockable with an AED.
What is ventricular fibrillation.