1. Physiology, Health & Exercise
Lesson 3
ECG Tracings

2. ECG Electrocardiogram Easy to carry out
Graphic record of electrical activity of the heart as it contracts and relaxes
Used to check for problems with the heart
Also used to check condition of heart
shows
abnormal heart beats
Areas of damage
Inadequate blood flow

3. ECG
Leads attached to a persons chest & limbs to record electrical currents
Measures electrical current during cardiac cycle and at skin surface
Usually done when patient at rest, lying down & relaxed
May be done when patient on a treadmill (stress test)
ECG in action

4. ECG Can calculate 1 cardiac cycle time By (no of squares between each
QRS complex) x 0.2
Then x 60 for bpm

6. ECG If heart rate higher than 100bpm- tachycardia
If heart rate lower than 60bpm- bradycardia
Interrupted activity or rhythm- arrhythmia