CCT Test Exam Questions and
Answers 100% Pass
The heart is divided into _ chambers - ✔✔4 chambers
Which of the following supplies blood to the arterial system after contraction - ✔✔Left
Ventricle
The sensitivity switch controls the - ✔✔Amplification
The little "spark" that makes the heart beat, originates in the - ✔✔SA node
Which of the following is a poor conductor of electric current? - ✔✔Dry skin
Right sided Electrocardiograms (ECGs) - ✔✔to detect right ventricular STEMI
associated with occlusion of the right coronary artery, obtain a right sided ecg
Significance of right sided ecg - ✔✔they are time sensitive, right sided and posterior
ecgs may be useful in identifying STEMI of the right ventricle and/or posterior wall
populations for right sided ecg - ✔✔adults and geriatric, not sufficient evidence to
recommend this to pediatric
When a 15 lead/ 18 lead machine arent available - ✔✔manipulation of the leads from a
standard 12 lead ecg machine allow additional areas of the heart to be imaged
Indications of a RV wall infarction may include - ✔✔-ST elevation in the inferior leads,
II, III, aVF
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,-ST elevation that is greatest in lead III is especially significant
-ST elevation in V1( considered to be the only precordial lead that faces the RV on the
standard 12 lead ECG
-Other findings may include; right bundle branch block, second and third degree
atrioventricular block, ST segment elevation in lead V2 50% greater than the magnitude
of ST segment depression in leads aVF
What do you do with the right sided ecg printout - ✔✔label "Right sided ecg",
handwrite it if printout cant, re label v1-v6 to V1R-V6R
Presence of a right ventricular wall infarction is seen when - ✔✔there is ST elevation
greater than 1 mm in V4R
Up to 50% of pts with inferior wall MI may have.. - ✔✔RV infarction or ischemia
Occlusion of the right coronary artery proximal to the right ventricle branch is
associated with.. - ✔✔inferior wall MI involving the RV
in approximately 10% of the population, the left circumflex artery supplies the right
ventricle and may therefore.. - ✔✔cause an associated lateral wall MI in conjunction
with the RV infarction
pts with coexisting RV infarct have more myocardium involved increasing their rick of
complications up and including.. - ✔✔death
isolated RV infarct is rare, reported to be - ✔✔>3%
Hypotension results from the RV dysfunction = - ✔✔Patients are preload dependent,
they rely on RV filling pressure to maintain cardiac output, use of vasodilators should
be avoided
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,when to obtain a posterior ECG - ✔✔to detect posterior STEMI associated with
occlusion of the circumflex artery or dominant right coronary artery
indications of a posterior wall infarction may include - ✔✔-changes in V1-V3 on
standard 12 lead ecg predominantly, which include
-horizontal ST depression
-A tall, wide R wave
-A tall upright T wave
-R?S wave ratio greater than 1
-Inferior or lateral wall MI (especially if accompanied by ST depression or prominent R
waves in leads V1-V3
approximately 15-20% of all myocardial infarctions involve the posterior wall of the
ventricle and when found in conjunction with an inferior or lateral wall MI, it
significantly increases mortality .. - ✔✔up to 11% of all MIs are thought to be isolated
posterior wall MIs
ST elevation >.5mm in leads V8-9 is sensitive for posterior wall infarction - ✔✔as high
as 90% with predictive accuracy up to 93.8%
Due to the distance of the heart (which is more anterior in the chest) - ✔✔voltage
recorded in the posterior leads is often less
coronal plane (frontal plane) - ✔✔vertical division of the body into front (anterior) and
back (posterior) portions
sagittal plane - ✔✔a vertical plane that divides the body into right and left parts
axial plane - ✔✔A horizontal flat surface dividing the body into upper and lower parts;
also known as the transverse plane
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, bipolar standard limb leads (frontal or coronal pane) - ✔✔lead 1= right arm to left arm
lead 2= right arm to left leg
lead 3= left arm to left leg
Augmented voltage leads - ✔✔Lead AVR to RA
Lead AVL to LA
Lead AVF to LL (foot)
Precordial leads- unipolar- transverse or horizontal plane - ✔✔V1 red
V2 yellow
V3 green
V4 blue
V5 orange
V6 violet
if an impulse travels toward a positive pole it will make a - ✔✔positive deflection
if an impulse travels away from a positive pole it will make a - ✔✔negative deflection
Einthovens law - ✔✔lead 1+lead 3 = lead 2
check which leads when lead 1 is negative and AVR is positive - ✔✔check arm leads
inferior leads - ✔✔Leads II,III, aVF Look at electrical activity from the vantage point of
the inferior surface
anterior leads - ✔✔V1, V2, V3, V4
lateral leads - ✔✔I, aVL, V5, V6
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Answers 100% Pass
The heart is divided into _ chambers - ✔✔4 chambers
Which of the following supplies blood to the arterial system after contraction - ✔✔Left
Ventricle
The sensitivity switch controls the - ✔✔Amplification
The little "spark" that makes the heart beat, originates in the - ✔✔SA node
Which of the following is a poor conductor of electric current? - ✔✔Dry skin
Right sided Electrocardiograms (ECGs) - ✔✔to detect right ventricular STEMI
associated with occlusion of the right coronary artery, obtain a right sided ecg
Significance of right sided ecg - ✔✔they are time sensitive, right sided and posterior
ecgs may be useful in identifying STEMI of the right ventricle and/or posterior wall
populations for right sided ecg - ✔✔adults and geriatric, not sufficient evidence to
recommend this to pediatric
When a 15 lead/ 18 lead machine arent available - ✔✔manipulation of the leads from a
standard 12 lead ecg machine allow additional areas of the heart to be imaged
Indications of a RV wall infarction may include - ✔✔-ST elevation in the inferior leads,
II, III, aVF
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,-ST elevation that is greatest in lead III is especially significant
-ST elevation in V1( considered to be the only precordial lead that faces the RV on the
standard 12 lead ECG
-Other findings may include; right bundle branch block, second and third degree
atrioventricular block, ST segment elevation in lead V2 50% greater than the magnitude
of ST segment depression in leads aVF
What do you do with the right sided ecg printout - ✔✔label "Right sided ecg",
handwrite it if printout cant, re label v1-v6 to V1R-V6R
Presence of a right ventricular wall infarction is seen when - ✔✔there is ST elevation
greater than 1 mm in V4R
Up to 50% of pts with inferior wall MI may have.. - ✔✔RV infarction or ischemia
Occlusion of the right coronary artery proximal to the right ventricle branch is
associated with.. - ✔✔inferior wall MI involving the RV
in approximately 10% of the population, the left circumflex artery supplies the right
ventricle and may therefore.. - ✔✔cause an associated lateral wall MI in conjunction
with the RV infarction
pts with coexisting RV infarct have more myocardium involved increasing their rick of
complications up and including.. - ✔✔death
isolated RV infarct is rare, reported to be - ✔✔>3%
Hypotension results from the RV dysfunction = - ✔✔Patients are preload dependent,
they rely on RV filling pressure to maintain cardiac output, use of vasodilators should
be avoided
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,when to obtain a posterior ECG - ✔✔to detect posterior STEMI associated with
occlusion of the circumflex artery or dominant right coronary artery
indications of a posterior wall infarction may include - ✔✔-changes in V1-V3 on
standard 12 lead ecg predominantly, which include
-horizontal ST depression
-A tall, wide R wave
-A tall upright T wave
-R?S wave ratio greater than 1
-Inferior or lateral wall MI (especially if accompanied by ST depression or prominent R
waves in leads V1-V3
approximately 15-20% of all myocardial infarctions involve the posterior wall of the
ventricle and when found in conjunction with an inferior or lateral wall MI, it
significantly increases mortality .. - ✔✔up to 11% of all MIs are thought to be isolated
posterior wall MIs
ST elevation >.5mm in leads V8-9 is sensitive for posterior wall infarction - ✔✔as high
as 90% with predictive accuracy up to 93.8%
Due to the distance of the heart (which is more anterior in the chest) - ✔✔voltage
recorded in the posterior leads is often less
coronal plane (frontal plane) - ✔✔vertical division of the body into front (anterior) and
back (posterior) portions
sagittal plane - ✔✔a vertical plane that divides the body into right and left parts
axial plane - ✔✔A horizontal flat surface dividing the body into upper and lower parts;
also known as the transverse plane
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, bipolar standard limb leads (frontal or coronal pane) - ✔✔lead 1= right arm to left arm
lead 2= right arm to left leg
lead 3= left arm to left leg
Augmented voltage leads - ✔✔Lead AVR to RA
Lead AVL to LA
Lead AVF to LL (foot)
Precordial leads- unipolar- transverse or horizontal plane - ✔✔V1 red
V2 yellow
V3 green
V4 blue
V5 orange
V6 violet
if an impulse travels toward a positive pole it will make a - ✔✔positive deflection
if an impulse travels away from a positive pole it will make a - ✔✔negative deflection
Einthovens law - ✔✔lead 1+lead 3 = lead 2
check which leads when lead 1 is negative and AVR is positive - ✔✔check arm leads
inferior leads - ✔✔Leads II,III, aVF Look at electrical activity from the vantage point of
the inferior surface
anterior leads - ✔✔V1, V2, V3, V4
lateral leads - ✔✔I, aVL, V5, V6
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