WorksheetsUnderstanding the Electrocardiogram (EKG/ECG)
Total questions: 10
Worksheet time: 5mins
What does an electrocardiogram (EKG/ECG) record?
The blood pressure levels
The oxygen levels in the blood
The electrical activity of the heart
The electrical activity of the brain
Where does the signal for the heart to contract start?
AV node
SA node
Purkinje fibers
Bundle fibers
What does the P wave represent in an EKG?
Ventricular depolarization
Ventricular repolarization
Atrial repolarization
Atrial depolarization
What is the QRS complex indicative of?
Atrial depolarization
Ventricular repolarization
Atrial repolarization
Ventricular depolarization
Why is the QRS complex larger than the P wave?
The atria are larger than the ventricles
The ventricles have more muscle and are larger than the atria
The signal in the atria is weaker
The electrodes are closer to the ventricles
What does the T wave represent?
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
Why don't we see atrial repolarization on the EKG?
It happens after the ventricles repolarize
It is represented by the T wave
It is overshadowed by the QRS complex
It does not produce a detectable signal
How are the electrical activities of the heart recorded in an EKG?
By measuring the heart's temperature
By recording the sound of the heart
By placing skin electrodes on different parts of the body
By using a stethoscope
What is the sequence of heart signal transmission?
Purkinje fibers -> Bundle fibers -> SA node -> AV node
AV node -> SA node -> Purkinje fibers -> Bundle fibers
SA node -> AV node -> Bundle fibers -> Purkinje fibers
Bundle fibers -> Purkinje fibers -> AV node -> SA node
What is the purpose of using an EKG?
To test for irregularities in heart function
To measure the blood's oxygen level
To record brain activity
To check the efficiency of the lungs
