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Dog's nose detects irregular heartbeat on flight
19 Aug
Summary
- A medical alert dog alerted a passenger to a heart issue during a flight.
- The dog's owner noted its unusual behavior was linked to heart problems.
- Doctors later confirmed the passenger had a mildly irregular heartbeat.

A medical alert dog's persistent pawing at a stranger on a flight led to a surprising discovery months later. The dog's owner explained that such behavior indicated a potential heart issue for the passenger. While initially overlooked, the passenger later had her heartbeat checked during a routine doctor's visit.
Doctors confirmed the passenger had a mildly irregular heartbeat, validating the dog's uncanny ability. Scientific studies support that dogs can detect subtle physiological changes, including those related to heart conditions, through scent. Their highly developed sense of smell allows them to identify chemical markers in human fluids associated with various medical issues, acting as natural biosensors.