PASCO CI-6539A EKG SENSOR - Manual (Page 9)

012–06852A EKG Sensor
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*Suggested Reading
The following are authoritative sources of information concerning
the use of EKG machines and electocardiographs in medical practice.
Carr, Joseph J. and John M. Brown. Introduction to Biomedical
Equipment Technology. New York: John Wiley & Sons, 1981.
Conover, Mary Boudreau. Understanding Electrocardiography,
Seventh Edition. St. Louis: Mosby, 1996.
Wagner, Galen S. Mariott’s Practical Electrocardiography, Ninth
Edition. Baltimore: Williams and Wilkens, 1994.
Figure 3
Sample EKG Graph
➤ ➤ ➤ ➤ ➤ Note: If your EKG does not
correspond to the above numbers, DO
NOT BE ALARMED! These numbers
represent typical averages and many
healthy hearts have data that fall
outside of these parameters. To read a
EKG effectively takes considerable
training and skill. This sensor is NOT
intended for medical diagnoses.*
The sequence from P wave to T wave represents one heart cycle. The
number of such cycles in a minute is called the heart rate and is
typically 70-80 cycles (beats) per minute at rest.
Some typical times for portions of the EKG are given in Figure 3.
P-R interval ....120-200 milliseconds
QRS interval ....under 100 milliseconds
Q-T interval .....under 380 milliseconds