ELECTROCARDIOGRAPHY NUR 204-
CARE OF PATIENTS WITH CARDIAC
DISORDERS EXAM QUESTIONS WITH
COMPLETE ANSWERS { GRADED A+}
Polarization - ✔✔Is the state during which the heart cells are at their peak resting
energy during this portion of the cycle, the cells (in their resting state) are
electrically polarized
Depolarization - ✔✔On the other hand, is a state of cellular stimulation that
precedes contraction- the electrical activation of the cells of the heart that initiates
contraction of the heart muscle
Repolarization - ✔✔Is a state of cellular recovery that follows each contraction.
The return of the heart muscle cells to there resting electrical state, causing the
heart muscle to relax
, Isoelectric line - ✔✔The period when the electrical tracing of the ECG is at zero
or a straight line, and no positive or negative deflections are seen
P wave - ✔✔atrial depolarization resulting in atrial contractions
QRS complex - ✔✔ventricular depolarization resulting in ventricular contractions
0.06 to 0.10
T wave - ✔✔ventricular repolarization
PR interval - ✔✔0.12-0.20 seconds
P wave and baseline before QRS complex
QT interval - ✔✔ORS complex , ST segment and T wave
< 0.44
ST segment - ✔✔end of QRS to beginning of T wave
Five vertical heavy lines or boxes - ✔✔1 second
one vertical heavy line or box - ✔✔0.2 second
smallest vertical line or box - ✔✔0.04 second
Two large horizontal heavy lines or boxes - ✔✔1mV
CARE OF PATIENTS WITH CARDIAC
DISORDERS EXAM QUESTIONS WITH
COMPLETE ANSWERS { GRADED A+}
Polarization - ✔✔Is the state during which the heart cells are at their peak resting
energy during this portion of the cycle, the cells (in their resting state) are
electrically polarized
Depolarization - ✔✔On the other hand, is a state of cellular stimulation that
precedes contraction- the electrical activation of the cells of the heart that initiates
contraction of the heart muscle
Repolarization - ✔✔Is a state of cellular recovery that follows each contraction.
The return of the heart muscle cells to there resting electrical state, causing the
heart muscle to relax
, Isoelectric line - ✔✔The period when the electrical tracing of the ECG is at zero
or a straight line, and no positive or negative deflections are seen
P wave - ✔✔atrial depolarization resulting in atrial contractions
QRS complex - ✔✔ventricular depolarization resulting in ventricular contractions
0.06 to 0.10
T wave - ✔✔ventricular repolarization
PR interval - ✔✔0.12-0.20 seconds
P wave and baseline before QRS complex
QT interval - ✔✔ORS complex , ST segment and T wave
< 0.44
ST segment - ✔✔end of QRS to beginning of T wave
Five vertical heavy lines or boxes - ✔✔1 second
one vertical heavy line or box - ✔✔0.2 second
smallest vertical line or box - ✔✔0.04 second
Two large horizontal heavy lines or boxes - ✔✔1mV
