Measurement and normal ECG.ppt

文档介绍：measurement
and
normal ECG
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A graph paper
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This diagram illustrates ECG waves and intervals as well as standard time and voltage measures on the ECG paper.
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P wave duration:×3=
plex duration:×=
T wave duration:×5=
P-R interval:×4=
Q-T interval:×9=
R wave amplitude:×10=
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Characteristics of the normal ECG
Measuring intervals and rates in EKG strips
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Measuring the Heart Rate
Normal sinus rhythm
Heart Rate: 60 - 100 bpm
How to calculate the heart rate on ECG paper ?
ECG
10 Second Rule
Calculation
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Heart rate (HR) is readily calculated from the ECG as follows:
HR= 60 / RR interval in seconds
HR =1,500 / RR interval in millimeters
HR =300 / number of large squares between essive R waves
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Rule of 300
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