PASCO CI-6539A EKG SENSOR - Manual (Page 12)

EKG Sensor 012–06852A
8
Suggested Experiments
Resting EKG
• Measure the EKG of a person who is at rest. The person whose
EKG is being measured should remain calm and relaxed.
Encourage the person to breath normally. Use the Graph to
display the recorded data.
• Record the information specified in Table 1.1:
• Compare your values to the ones given earlier. What could
explain the differences?
EKG after Mild Exercise
• Measure the EKG of a person who is initially at rest. Disconnect
the sensor wires from the electrode patches, but leave the patches
on the person whose EKG is being measured. Have the person
exercise for three minutes by jogging in place or by “stepping-in-
time”.
• Reattach the sensor wires to the electrodes on the person within
thirty seconds after the exercise is done, and measure the EKG.
Compare the EKG after mild exercise to the rest EKG.
EKG and Different Body Positions
• Use body position as your independent variable. Measure the
rest EKG as before. Then have the person sit or stand or lie down.
Make no other changes. Note any changes in heart rate, interval
times, height of R wave, etc. In other words, compare your results
with your rest EKG.
EKG and Mild Stimulants
• Drink a couple of cups of strong caffeinated coffee as your
independent variable. (This might show less effect on people
who are accustomed to large amounts of coffee.) Compare your
results with the resting EKG results and mild exercise EKG
results.
Time (milliseconds) Interval
P-Q
QRS
Q-T
Rate (per minute) Item
Minimum
Maximum
Average
Table 1.1 Interval Analysis
Table 1.2 Heart Rate Analysis