NURS 5354 EKG EXAM 2025/2026
QUESTIONS AND ANSWERS 100% PASS
Heart 4 chambers - ANS Right and Left atrium & Right and Left ventricle
Perfusion to the various chambers of the heart is via - ANS RCA & Left main descends into
LAD (left anterior descending artery)
RCA supplies blood to - ANS RA, RV, SA (sinoatrial node) & AV (atrioventricular node)
LAD supplies blood to - ANS L front side of the heart
L circumflex artery supplies - ANS to left outer side as well as posterior side of the heart
Both the LAD & RCA supply blood to - ANS the septum
Cardiac contraction happens when - ANS depolarization of the heart
3 heart components which spread electrical currents - ANS cardiac pacemaker cells,
specialized conduction tissue, & the heart muscle
1 @COPYRIGHT 2025/2026
, Depolarization originates in - ANS 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 - ANS activate ventricular muscle
Only electrical conduction between the atria and ventricles (healthy heart) - ANS AV node
12-lead ECG - ANS electric potentials generated by the heart and captures the electrical
component (depolarization & repolarization)
12 lead ECG electrical activity measured from - ANS 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 - ANS I, II, III, aVR, aVL, & aVF
Horizontal plane provides for leads - ANS V1, V2, V3, V4, V5, & V6
Lateral leads are - ANS Lead I, aVL, V5, and V6
Lateral leads represent - ANS Left circumflex artery
Inferior leads are - ANS Lead II, III, and aVF
Inferior leads represent - ANS RCA
2 @COPYRIGHT 2025/2026
QUESTIONS AND ANSWERS 100% PASS
Heart 4 chambers - ANS Right and Left atrium & Right and Left ventricle
Perfusion to the various chambers of the heart is via - ANS RCA & Left main descends into
LAD (left anterior descending artery)
RCA supplies blood to - ANS RA, RV, SA (sinoatrial node) & AV (atrioventricular node)
LAD supplies blood to - ANS L front side of the heart
L circumflex artery supplies - ANS to left outer side as well as posterior side of the heart
Both the LAD & RCA supply blood to - ANS the septum
Cardiac contraction happens when - ANS depolarization of the heart
3 heart components which spread electrical currents - ANS cardiac pacemaker cells,
specialized conduction tissue, & the heart muscle
1 @COPYRIGHT 2025/2026
, Depolarization originates in - ANS 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 - ANS activate ventricular muscle
Only electrical conduction between the atria and ventricles (healthy heart) - ANS AV node
12-lead ECG - ANS electric potentials generated by the heart and captures the electrical
component (depolarization & repolarization)
12 lead ECG electrical activity measured from - ANS 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 - ANS I, II, III, aVR, aVL, & aVF
Horizontal plane provides for leads - ANS V1, V2, V3, V4, V5, & V6
Lateral leads are - ANS Lead I, aVL, V5, and V6
Lateral leads represent - ANS Left circumflex artery
Inferior leads are - ANS Lead II, III, and aVF
Inferior leads represent - ANS RCA
2 @COPYRIGHT 2025/2026
