CCT Certification Exam Study Guide
UPDATE VERIFIED QUESTIONS &
DETAILED EXPLANATIONS GRADED
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Lead I records the electrical activity between the - Answer: right
arm (-) to left arm (+)
Lead II records the electrical activity between the - Answer: right
arm to left leg
Lead III records the electrical activity between the - Answer: left
arm to left leg
aVF records the electrical activity from the - Answer: center of
the heart to the left leg
aVL records the electrical activity from the - Answer: center of
the heart to the left arm
aVR records the electrical activity from - Answer: the center of
the heart to the right arm
,(usually negative deflection)
3 major functions of EKG machine - Answer: 1. Input: signals
coming from electrode into EKG machine
2. Signal processing: amplifies electrical impulse inside the
machine
3. Output: displayed on screen/printed report
Gain Control (controls height of waveform) normal setting -
Answer: 10 mm/mV
Artifact Filter normal setting - Answer: between 40-150 Hz
Continuous EKG monitoring leads - Answer: 3 leads
Lead II is most important
RA: white
LA: black
LL: red
,Modification for pediatric EKG - Answer: V3 may require
placement on the right side (V3R) to avoid crowding of
electrodes on the left side
Modification for pregnant patients - Answer: -place lower limb
leads on thighs instead of abdomen
-document that patient is pregnant and how many months along
Modification for patient with Dextrocardia - Answer: -reverse
leads from normal placement
-indicate "right side" on chart
(aVR tracing will produce a positive deflection)
Normal range of PR interval - Answer: 0.12 to 0.20 second
Normal range of QRS complex - Answer: 0.06 to 0.10 second
Normal length of Q wave - Answer: less than 0.04 second
Causes of ischemia (lack of blood supply to an area) - Answer: -
, clot
-plaque (cholesterol)
-vascular spasm
-emboli
Right coronary artery branches - Answer: -Posterior Descending
Artery
-Marginal Artery
Left coronary artery branches - Answer: -Circumflex Artery
-Left Anterior Descending Artery
Posterior descending artery - Answer: supplies blood to
posterior wall of the heart
Marginal artery - Answer: supplies blood to walls of right atrium
and right ventricle
Circumflex artery - Answer: supplies blood to lateral wall of left
ventricles
Left anterior descending artery - Answer: supplies blood to
anterior wall of left ventricle
UPDATE VERIFIED QUESTIONS &
DETAILED EXPLANATIONS GRADED
A+
Professional Academic Assistance Services
Lead I records the electrical activity between the - Answer: right
arm (-) to left arm (+)
Lead II records the electrical activity between the - Answer: right
arm to left leg
Lead III records the electrical activity between the - Answer: left
arm to left leg
aVF records the electrical activity from the - Answer: center of
the heart to the left leg
aVL records the electrical activity from the - Answer: center of
the heart to the left arm
aVR records the electrical activity from - Answer: the center of
the heart to the right arm
,(usually negative deflection)
3 major functions of EKG machine - Answer: 1. Input: signals
coming from electrode into EKG machine
2. Signal processing: amplifies electrical impulse inside the
machine
3. Output: displayed on screen/printed report
Gain Control (controls height of waveform) normal setting -
Answer: 10 mm/mV
Artifact Filter normal setting - Answer: between 40-150 Hz
Continuous EKG monitoring leads - Answer: 3 leads
Lead II is most important
RA: white
LA: black
LL: red
,Modification for pediatric EKG - Answer: V3 may require
placement on the right side (V3R) to avoid crowding of
electrodes on the left side
Modification for pregnant patients - Answer: -place lower limb
leads on thighs instead of abdomen
-document that patient is pregnant and how many months along
Modification for patient with Dextrocardia - Answer: -reverse
leads from normal placement
-indicate "right side" on chart
(aVR tracing will produce a positive deflection)
Normal range of PR interval - Answer: 0.12 to 0.20 second
Normal range of QRS complex - Answer: 0.06 to 0.10 second
Normal length of Q wave - Answer: less than 0.04 second
Causes of ischemia (lack of blood supply to an area) - Answer: -
, clot
-plaque (cholesterol)
-vascular spasm
-emboli
Right coronary artery branches - Answer: -Posterior Descending
Artery
-Marginal Artery
Left coronary artery branches - Answer: -Circumflex Artery
-Left Anterior Descending Artery
Posterior descending artery - Answer: supplies blood to
posterior wall of the heart
Marginal artery - Answer: supplies blood to walls of right atrium
and right ventricle
Circumflex artery - Answer: supplies blood to lateral wall of left
ventricles
Left anterior descending artery - Answer: supplies blood to
anterior wall of left ventricle
