INTRODUCTION TO EKG/ECG INTERPRETATION
EXAM QUIZZES WITH ACCURATE ANSWERS .
What is an EKG? - correct Answers -An electrocardiogram — abbreviated as EKG or ECG — is a test that
measures the electrical activity of the heartbeat. With each beat, an electrical impulse (or "wave")
travels through the heart. This wave causes the muscle to squeeze and pump blood from the heart.
Describe the normal electrical conduction in the heart - correct Answers -The electrical impulse travels
from the sinus node (upper right atrium) to the atrioventricular node (lower right atrium) to the Bundle
of His and then down the Left and Right Bundle Branches throughout the left and right ventricles
Describe the Standard Limb Leads - correct Answers -Standard Limb Leads I, II, III
Lead I: (-) right arm to left arm (+)
Lead II: (-) right arm to left leg (+)
Lead III: (-) left arm to left leg (+)
Describe Lead I - correct Answers -Lead I: (-) right arm to left arm (+)
Describe Lead II - correct Answers -Lead II: (-) right arm to left leg (+)
Describe Lead III - correct Answers -Lead III: (-) left arm to left leg (+)
What are the 3 Augmented Limb Leads? - correct Answers -aVL
aVR
aVF
Describe the aVL lead - correct Answers -aVL means augmented Vector Left; the positive electrode is on
the left shoulder.
1
, Describe the aVR lead - correct Answers -aVR means augmented Vector Right; the positive electrode is
on the right shoulder.
Describe the aVF lead - correct Answers -aVF means augmented Vector Foot; the positive electrode is on
the foot.
On an ECG paper, the x axis represents ___________ - correct Answers -time (in milliseconds)
On an ECG paper, a 1mm (tiny box) represents on the x axis represents _________ seconds - correct
Answers -0.04
On an ECG paper, the y axis represents ___________ - correct Answers -voltage/amplitude (in millivolts)
On an ECG paper, 1 mm (tiny box) on the y axis represents ___________ - correct Answers -0.1mV
On an ECP paper, a larger square on the x-axis represents ___________ - correct Answers -0.2 seconds
If the electrical signal is moving towards a positive pole, it will lead to a(n) _____________ deflection on
paper - correct Answers -upwards
If the electrical signal is moving away from a positive pole, it will lead to a ______________ deflection
on paper - correct Answers -downwards
If the electrical signal is moving ___________________ to a vector then the deflection will be up and
down - correct Answers -perpendicular
Why is the QRS waveform upwards in lead II? - correct Answers -In lead II, the electrical conduction
signal (direction of depolarization) of the heart's muscle tissue travels towards the positive pole creating
an upward waveform.
What does the P wave represent? Describe it. - correct Answers --Sequential depolarization of RIGHT
and LEFT Atria
2
EXAM QUIZZES WITH ACCURATE ANSWERS .
What is an EKG? - correct Answers -An electrocardiogram — abbreviated as EKG or ECG — is a test that
measures the electrical activity of the heartbeat. With each beat, an electrical impulse (or "wave")
travels through the heart. This wave causes the muscle to squeeze and pump blood from the heart.
Describe the normal electrical conduction in the heart - correct Answers -The electrical impulse travels
from the sinus node (upper right atrium) to the atrioventricular node (lower right atrium) to the Bundle
of His and then down the Left and Right Bundle Branches throughout the left and right ventricles
Describe the Standard Limb Leads - correct Answers -Standard Limb Leads I, II, III
Lead I: (-) right arm to left arm (+)
Lead II: (-) right arm to left leg (+)
Lead III: (-) left arm to left leg (+)
Describe Lead I - correct Answers -Lead I: (-) right arm to left arm (+)
Describe Lead II - correct Answers -Lead II: (-) right arm to left leg (+)
Describe Lead III - correct Answers -Lead III: (-) left arm to left leg (+)
What are the 3 Augmented Limb Leads? - correct Answers -aVL
aVR
aVF
Describe the aVL lead - correct Answers -aVL means augmented Vector Left; the positive electrode is on
the left shoulder.
1
, Describe the aVR lead - correct Answers -aVR means augmented Vector Right; the positive electrode is
on the right shoulder.
Describe the aVF lead - correct Answers -aVF means augmented Vector Foot; the positive electrode is on
the foot.
On an ECG paper, the x axis represents ___________ - correct Answers -time (in milliseconds)
On an ECG paper, a 1mm (tiny box) represents on the x axis represents _________ seconds - correct
Answers -0.04
On an ECG paper, the y axis represents ___________ - correct Answers -voltage/amplitude (in millivolts)
On an ECG paper, 1 mm (tiny box) on the y axis represents ___________ - correct Answers -0.1mV
On an ECP paper, a larger square on the x-axis represents ___________ - correct Answers -0.2 seconds
If the electrical signal is moving towards a positive pole, it will lead to a(n) _____________ deflection on
paper - correct Answers -upwards
If the electrical signal is moving away from a positive pole, it will lead to a ______________ deflection
on paper - correct Answers -downwards
If the electrical signal is moving ___________________ to a vector then the deflection will be up and
down - correct Answers -perpendicular
Why is the QRS waveform upwards in lead II? - correct Answers -In lead II, the electrical conduction
signal (direction of depolarization) of the heart's muscle tissue travels towards the positive pole creating
an upward waveform.
What does the P wave represent? Describe it. - correct Answers --Sequential depolarization of RIGHT
and LEFT Atria
2
