NURS 5354 EKG EXAM LATEST UPDATE
QUESTIONS and ANSWERS GRADED A+
heart 4 chambers - CORRECT ANSWER-Right and Left atrium & Right and Left ventricle
Perfusion to the various chambers of the heart is via - CORRECT ANSWER-RCA & Left
main descends into LAD (left anterior descending artery)
,RCA supplies blood to - CORRECT ANSWER-RA, RV, SA (sinoatrial node) & AV
(atrioventricular node)
LAD supplies blood to - CORRECT ANSWER-L front side of the heart
L circumflex artery supplies - CORRECT ANSWER-to left outer side as well as posterior
side of the heart
Both the LAD & RCA supply blood to - CORRECT ANSWER-the septum
Cardiac contraction happens when - CORRECT ANSWER-depolarization of the heart
3 heart components which spread electrical currents - CORRECT ANSWER-cardiac
pacemaker cells, specialized conduction tissue, & the heart muscle
Depolarization originates in - CORRECT ANSWER-SA node & spreads through the R&L
atrium which is followed by atrial contraction. The impulse travels to AV node emerges and
transmits through bundle of His, then L&R bundle branches, and finally through the Purkinje
fibers which facilitates activation of the ventricular muscle
Purkinje Fibers - CORRECT ANSWER-activate ventricular muscle
, Only electrical conduction between the atria and ventricles (healthy heart) - CORRECT
ANSWER-AV node
12-lead ECG - CORRECT ANSWER-electric potentials generated by the heart and
captures the electrical component (depolarization & repolarization)
12 lead ECG electrical activity measured from - CORRECT ANSWER-12 perspectives
(leads) of the heart can be evaluated through 2 electrical planes (vertical and horizontal). 4
extremity or limb leads and 6 precordial or chest leads
Vertical plane provides info for leads - CORRECT ANSWER-I, II, III, aVR, aVL, & aVF
Horizontal plane provides for leads - CORRECT ANSWER-V1, V2, V3, V4, V5, & V6
Lateral leads are - CORRECT ANSWER-Lead I, aVL, V5, and V6
Lateral leads represent - CORRECT ANSWER-Left circumflex artery
Inferior leads are - CORRECT ANSWER-Lead II, III, and aVF
Inferior leads represent - CORRECT ANSWER-RCA
QUESTIONS and ANSWERS GRADED A+
heart 4 chambers - CORRECT ANSWER-Right and Left atrium & Right and Left ventricle
Perfusion to the various chambers of the heart is via - CORRECT ANSWER-RCA & Left
main descends into LAD (left anterior descending artery)
,RCA supplies blood to - CORRECT ANSWER-RA, RV, SA (sinoatrial node) & AV
(atrioventricular node)
LAD supplies blood to - CORRECT ANSWER-L front side of the heart
L circumflex artery supplies - CORRECT ANSWER-to left outer side as well as posterior
side of the heart
Both the LAD & RCA supply blood to - CORRECT ANSWER-the septum
Cardiac contraction happens when - CORRECT ANSWER-depolarization of the heart
3 heart components which spread electrical currents - CORRECT ANSWER-cardiac
pacemaker cells, specialized conduction tissue, & the heart muscle
Depolarization originates in - CORRECT ANSWER-SA node & spreads through the R&L
atrium which is followed by atrial contraction. The impulse travels to AV node emerges and
transmits through bundle of His, then L&R bundle branches, and finally through the Purkinje
fibers which facilitates activation of the ventricular muscle
Purkinje Fibers - CORRECT ANSWER-activate ventricular muscle
, Only electrical conduction between the atria and ventricles (healthy heart) - CORRECT
ANSWER-AV node
12-lead ECG - CORRECT ANSWER-electric potentials generated by the heart and
captures the electrical component (depolarization & repolarization)
12 lead ECG electrical activity measured from - CORRECT ANSWER-12 perspectives
(leads) of the heart can be evaluated through 2 electrical planes (vertical and horizontal). 4
extremity or limb leads and 6 precordial or chest leads
Vertical plane provides info for leads - CORRECT ANSWER-I, II, III, aVR, aVL, & aVF
Horizontal plane provides for leads - CORRECT ANSWER-V1, V2, V3, V4, V5, & V6
Lateral leads are - CORRECT ANSWER-Lead I, aVL, V5, and V6
Lateral leads represent - CORRECT ANSWER-Left circumflex artery
Inferior leads are - CORRECT ANSWER-Lead II, III, and aVF
Inferior leads represent - CORRECT ANSWER-RCA
