Bold claim: a mattress literally saved a life. Your strangest bedfellow may be the very thing you lie on every night. While many stories focus on smart wearables like Oura rings spotting health issues, this time it was a bed that sounded the alarm for a 70-year-old man, nudging him toward life-saving care.
A recent report in the New England Journal of Medicine describes how the bed, equipped with ballistocardiogram sensors, tracked an unusually slow heart rate overnight. Cardiologist James Ip of Weill Cornell Medical College explained that once the alert appeared, the man cross-checked the bed’s data against his smartwatch and a home blood pressure monitor. The corroboration revealed bradycardia—a dangerously slow heartbeat.
Noticing shortness of breath, the man contacted his doctor, who directed him to the emergency department. The patient had a history of hypertension and coronary artery disease. The night-time average heart rate recorded by the bed was about 42 beats per minute, well below his typical rest rate of around 72 and close to levels associated with severe bradycardia. A normal resting heart rate usually ranges from 60 to 100 BPM.
At the ER, the heart rate had dropped a couple more beats. An electrocardiogram confirmed a complete heart block (third-degree atrioventricular block), an abnormal rhythm caused by a breakdown in the heart’s electrical signaling. Without timely intervention, the prognosis for complete heart block is poor and can lead to cardiac arrest or heart failure.
Thanks to the mattress’s alert, doctors promptly implanted a pacemaker, and the patient’s symptoms subsided. The bed’s non-invasive sensing relies on ballistocardiography, which can estimate heart rate and detect even subtle movements. This technology is already appearing in a growing lineup of consumer devices—from beds to wearables to smart textiles—and while it can’t diagnose conditions, it increasingly flags potential issues that merit clinical attention.
Experts like Ip remain hopeful about the broader role of wearable-enabled medical care. He told Gizmodo that raising awareness of these tools can help patients and clinicians manage cardiac arrhythmias more effectively through wearable-informed care. He also noted that asymptomatic bradycardia during sleep is common, though the emergence of symptoms such as shortness of breath should prompt a medical visit.
The old adage that a good night’s sleep fixes everything may not apply here, but in this case, a smart bed proved it can back you up when it matters most.
