ECG

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Across
  1. 3. the pen which produces the ECG drawing
  2. 5. a missed heartbeat
  3. 6. to check or adjust an instrument before use
  4. 7. an exercise _____ test (checks how well a patient deals with exercise)
  5. 8. the flow of electric current
Down
  1. 1. ____ disturbance (change in chemical composition of body fluids)
  2. 2. testing for disease before there are symptoms
  3. 4. the marks produced by an ECG stylus