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Nurs 5354 Ekg Questions And Answers With Verified Solutions 100% Correct!!!
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Nurs 5354 Ekg Questions And AnswersWith Verified Solutions 100% Correct!!!
heart 4 chambers - ANSWER✔✔ Right and Left atrium & Right and Left ventricle
Perfusion to the various chambers of the heart is via - ANSWER✔✔ RCA & Left
main descends into LAD (left anterior descending artery)
RCA supplies blood to - ANSWER✔✔ RA, RV, SA (sinoatrial node) & AV
(atrioventricular node)
LAD supplies blood to - ANSWER✔✔ L front side of the heart
L circumflex artery supplies - ANSWER✔✔ to left outer side as well as posterior
side of the heart
Both the LAD & RCA supply blood to - ANSWER✔✔ the septum
Cardiac contraction happens when - ANSWER✔✔ depolarization of the heart
3 heart components which spread electrical currents - ANSWER✔✔ cardiac
pacemaker cells, specialized conduction tissue, & the heart muscle
Depolarization originates in - 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 - ANSWER✔✔ activate ventricular muscle
Only electrical conduction between the atria and ventricles (healthy heart) -
ANSWER✔✔ AV node
12-lead ECG - ANSWER✔✔ electric potentials generated by the heart and
captures the electrical component (depolarization & repolarization)
12 lead ECG electrical activity measured from - 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 - ANSWER✔✔ I, II, III, aVR, aVL, & aVF
Horizontal plane provides for leads - ANSWER✔✔ V1, V2, V3, V4, V5, & V6
Lateral leads are - ANSWER✔✔ Lead I, aVL, V5, and V6
Lateral leads represent - ANSWER✔✔ Left circumflex artery
Inferior leads are - ANSWER✔✔ Lead II, III, and aVF
Inferior leads represent - ANSWER✔✔ RCA
, Anteroseptal leads - ANSWER✔✔ V1, V2, V3, and V4
Anteroseptal leads represent - ANSWER✔✔ LAD
Septal leads - ANSWER✔✔ V1 and V2. Represents LAD
Anterior leads - ANSWER✔✔ V3 and V4. Represents LAD
PQRST complex represents - ANSWER✔✔ depolarization and repolarization of
the heart
ECG box horizontal axis measures - ANSWER✔✔ Speed
Vertical axis measures - ANSWER✔✔ Amplitude of a given wave or deflection
One small square within a large box is - ANSWER✔✔ 0.04 seconds and 0.1mV
A large square which contains five boxes across and five boxes down is -
ANSWER✔✔ .2 sec and 0.5mV
Speed equates to - ANSWER✔✔ the # of complexes on a ECG strip = HR
Isoelectric line - ANSWER✔✔ designates the flat part of the diagram between the
P wave and T wave & significant variations in positive and negative deflections
can correlate with certain diseases or disorders
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