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Ekg Unit 5 Exercise 1

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Words 655
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EKG chart: =our data =the average of the class
AT REST
AFTER EXERCISE
P-R INTERVAL (beginning of P to start of QRS
0.12, .17
.19
QRS COMPLEX (beginning of Q to end of S)
.09, .07
.26
Q-T INTERVAL (beginning of Q to end of T)
.3, .32
.44
R-R INTERVAL (peak of R to peak of R)
.83, .72
.60
HEART RATE
72.289
100
MAXIMUM HEART RATE
XXXXXXXXXXXXXXXXXXX
136.36

The similarities in the EKG are the QRS intervals only changed by +2% which is not very much. On the other hand the R-R changed by -43% which is a huge rate of change. The R-R changed so dramatically becouse the heart has to pump faster in order to supply enough oxygen to the body. 1. The prolonged P-R interval of this ECG is caused by abnormalities in the path between the sinoatrial node and the …show more content…
In this ECG, the P waves and QRS complexes appear at normal intervals, but are not attached to one another. This is a complete heart block and the ECG indicates that the electrical impulse generated by the SA node is completely blocked before it reaches the ventricles. As a result, the AV node takes over as its own pacemaker, but it has a slower rate and as a result, the waves operate independently of one another. This can be the result of scarring due to a heart attack. This kind of ECG indicates that a pacemaker needs to be implanted. b 5. The damage to the heart muscle is so severe that electrical forces in this ECG cannot cross the scarred tissue at all and so must follow an alternate pathway. This causes the heart to change electrical potential in a different direction and thus results in an inverted Q wave. This kind of damage results from a heart attack. e 6. The wide QRS in beat three of this ECG is the result of an electrical impulse arising at random in the ventricles. No P wave is present. The QRS is slightly longer because the electrical pattern is not following the usual pathways. This is a benign condition called premature ventricular contraction and may be the result of caffeine use.

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