NHA EKG Module 2 Exam ACTUAL
QUESTIONS AND CORRECT ANSWERS
Which valves are atrioventricular valves? - CORRECT ANSWERS tricuspid and
bicuspid
Which valves are semilunar valves? - CORRECT ANSWERS aortic and pulmonary
Which vessels arise from the root of the aorta? - CORRECT ANSWERS right and left
coronary arteries
What does the left main coronary artery split into? - CORRECT ANSWERS left
circumflex (LCx) and left anterior descending (LAD) arteries
Occlusion of what vessel can lead to ventricular arrhythmia and death? - CORRECT
ANSWERS left anterior descending artery (LAD)
SA node - CORRECT ANSWERS natural pacemaker of the heart
rate: 60-100
located in the right atrial wall
Occlusion of the SA node artery can manifest...? - CORRECT ANSWERS extreme
sinus brady
What two vessels branch off from the RCA? - CORRECT ANSWERS sinoatrial node
artery and atrioventricular node artery
AV node - CORRECT ANSWERS rate: 40-60
- holds electrical signal received from SA node to allow ventricles to fill with blood
what shows on the EKG tracing when the AV node is not conducting as expected? -
CORRECT ANSWERS increases PR interval
, Why does a complete heart block happen? - CORRECT ANSWERS the AV node is
unable to conduct electrical impulses from SA node to the ventricles
What happens when there is occlusion of the AV node artery? - CORRECT
ANSWERS high-degree heart block
Collateral circulation - CORRECT ANSWERS circulation formed by smaller blood
vessels branching off from or near larger, occluded blood vessels
Why don't patients with coronary heart disease experience symptoms until it is in advanced
stages? - CORRECT ANSWERS collateral vessels compensate for reduced oxygen
supply
ectopic beats - CORRECT ANSWERS Impulses originating outside normal conduction
pathways of the heart.
How are ectopic beats seen on an EKG tracing? - CORRECT ANSWERS premature
atrial complex, premature junctional complex, premature ventricular complex
Bundle of His - CORRECT ANSWERS where the AV node conducts its impulse to
Right bundle branch (RBB) - CORRECT ANSWERS - carries impulses from Bundle
of His to purkinje fibers of right ventricle
- causes right ventricular depolarization
What vessel supplies the RBB and LBB with blood? - CORRECT ANSWERS LAD
Left bundle branch (LBB) - CORRECT ANSWERS - carries impulse from Bundle of
His to purkinje fibers of the left ventricle
- causes left ventricular depolartization
QUESTIONS AND CORRECT ANSWERS
Which valves are atrioventricular valves? - CORRECT ANSWERS tricuspid and
bicuspid
Which valves are semilunar valves? - CORRECT ANSWERS aortic and pulmonary
Which vessels arise from the root of the aorta? - CORRECT ANSWERS right and left
coronary arteries
What does the left main coronary artery split into? - CORRECT ANSWERS left
circumflex (LCx) and left anterior descending (LAD) arteries
Occlusion of what vessel can lead to ventricular arrhythmia and death? - CORRECT
ANSWERS left anterior descending artery (LAD)
SA node - CORRECT ANSWERS natural pacemaker of the heart
rate: 60-100
located in the right atrial wall
Occlusion of the SA node artery can manifest...? - CORRECT ANSWERS extreme
sinus brady
What two vessels branch off from the RCA? - CORRECT ANSWERS sinoatrial node
artery and atrioventricular node artery
AV node - CORRECT ANSWERS rate: 40-60
- holds electrical signal received from SA node to allow ventricles to fill with blood
what shows on the EKG tracing when the AV node is not conducting as expected? -
CORRECT ANSWERS increases PR interval
, Why does a complete heart block happen? - CORRECT ANSWERS the AV node is
unable to conduct electrical impulses from SA node to the ventricles
What happens when there is occlusion of the AV node artery? - CORRECT
ANSWERS high-degree heart block
Collateral circulation - CORRECT ANSWERS circulation formed by smaller blood
vessels branching off from or near larger, occluded blood vessels
Why don't patients with coronary heart disease experience symptoms until it is in advanced
stages? - CORRECT ANSWERS collateral vessels compensate for reduced oxygen
supply
ectopic beats - CORRECT ANSWERS Impulses originating outside normal conduction
pathways of the heart.
How are ectopic beats seen on an EKG tracing? - CORRECT ANSWERS premature
atrial complex, premature junctional complex, premature ventricular complex
Bundle of His - CORRECT ANSWERS where the AV node conducts its impulse to
Right bundle branch (RBB) - CORRECT ANSWERS - carries impulses from Bundle
of His to purkinje fibers of right ventricle
- causes right ventricular depolarization
What vessel supplies the RBB and LBB with blood? - CORRECT ANSWERS LAD
Left bundle branch (LBB) - CORRECT ANSWERS - carries impulse from Bundle of
His to purkinje fibers of the left ventricle
- causes left ventricular depolartization
