A six-month-old infant in Somerset County, U.K., was diagnosed with a dangerous congenital heart condition after his family’s Doberman exhibited obsessive behavior that alerted his mother to a life-threatening medical emergency.
Kim Reynolds noticed her dog, Saraya, pacing, whining, and licking the face of her son Alexander on the morning of Sept. 3, The Washington Post reported. Reynolds found the sudden neediness puzzling until later that day, when Alexander began screaming and crying inconsolably.
“I tried taking him outside, tried giving him a bath,” Reynolds recalled, noting that none of the usual soothing methods worked. Remembering the dog’s strange morning behavior, Reynolds and her mother decided to rush the infant in for emergency care.
Medical staff at the hospital discovered that Alexander’s heart rate was dangerously high, registering well over 200 beats per minute. Newser reported that doctors found the baby’s heart racing at nearly 300 beats per minute, prompting immediate intervention.
Hospital staff initially attempted to lower the infant’s heart rate by placing him in icy water, a technique that ultimately proved unsuccessful. Clinicians then administered medication via an intravenous line, which finally managed to settle the heart rate.
Alexander spent two nights in a pediatric ward while doctors monitored his condition and ran diagnostic tests. Physicians diagnosed him with Wolff-Parkinson-White syndrome, a congenital heart condition that triggers dangerous heart palpitations known as supraventricular tachycardia.

Vassilios Bezzerides, a cardiologist at Boston Children’s Hospital, explained that the condition forces an infant’s heart to function like someone running a marathon as fast as possible without taking a break. Without intervention, this constant strain can weaken the heart over time.
| Detail | Sourced Fact |
|---|---|
| Patient Location | Somerset County, U.K. |
| Incident Date | Sept. 3 |
| Diagnosed Condition | Wolff-Parkinson-White syndrome |
| Hospital Stay | Two nights in a pediatric ward |
Alexander was prescribed beta blockers following his discharge, and doctors informed the family that he may eventually require a procedure to regulate his heart rate. Reynolds stated that the infant is currently doing well.
Experts note that dogs frequently detect medical issues in humans before instruments do, relying on heightened senses of smell and hearing. Clara Wilson, a postdoctoral researcher at the University of Pennsylvania, explained that rapid changes in heart rate release chemical signals that dogs detect on human breath and sweat.
Clive Wynne, a dog behavior expert at Arizona State University, added that medical detection stems from a combination of sensory acuity and strong emotional attachment to humans. Reynolds expressed profound gratitude for her pet’s persistent warnings, admitting she likely would not have sought medical attention otherwise.