Solutions An instrument for recording heart muscle activity has 4 entries with similar clues
- 9-letter words
- polygraphMedical instrument used for recording changes in heartbeat, breathing rate, and blood pressure
- 15-letter words
- electromyographMedical instrument used for recording muscle activity
- 18-letter words
- electrocardiographInstrument used for recording changes in heartbeat
- 21-letter words
- electroencephalographMedical instrument used for recording the brain activity