what differences are abserved between EKG traces in figure 5 and figure 6,7,or 8
ID: 301549 • Letter: W
Question
what differences are abserved between EKG traces in figure 5 and figure 6,7,or 8?
uony other cardiac problems con be dognosed by meosuring the intervals and neight of the peaks in an EXG. QRS Complex PR Segment ST Segment PR Interval s QT Interval Figure 5: An electrocardiogram In this investigation, you ill learn how to (1) take a pulse, 12] listen to a heart, (3) take blood pressure, and (4) interpret a simple EKG. This will be done in four separate activities, which can be performed sequentially or in parallel with each other.Explanation / Answer
Fig 5 vs Fig 6
Both show a healthy EKG. Infact, Fig 6 is representation of Fig 5 on the Rhytm Strip.
Count the no of Large Squares in between the two R peaks (refer Fig 5) in Fig 6.
They are 5. To find the heart rate, we divide 300 by 5. = 60.
Hence a normal heart rate. (60-100).
Heart rhythm is regular.
PR interval is between 3-5 small sqaures. (normal) or 120-200 milli seconds.
Width of QRS complex around 0.12 seconds. (normal- 2-3 small squares)
( 1 small square = 1mm/25 mm per sec = 0.04 seconds)
ST segments are straight ( isoelectric line, neither depressed nor elevated)
Fig 5. vs Fig 7.
In Fig 7, Distance between R to R peak is irregular because of atrial fibrillation.
Normal P wave is absent.
ST segments are irregular.
Fibrillatory waves (normally absent) between the ST of previous and QRS of next wave.
Fig 5 vs Fig 8.
In Fig 8, Heart rate is aproximately 60 beats per minute.
Shortened P-R interval, less than 3 squares.
R peak heights attained are different.
QRS complex of around 3-4 small squares
ST segment elevated a bit but less than 1mm, hence not significant.
T waves of normal height. (less than 10mm)
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