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Bruno Molino says an Apple Watch alert helped him recognize that feeling overheated was something more serious. His heart rate kept climbing, and he asked his partner to call an ambulance. The watch did not diagnose or treat him; it gave him a warning he says prompted him to seek help.
What happened to Bruno Molino?
In an account published by Time+Tide Watches on January 5, 2021, Molino, then 55 and living in Melbourne, described sitting on the couch after dinner when he began to feel hot. He went outside to cool down. His Apple Watch beeped and showed a heart rate of about 110 beats per minute, compared with his usual resting rate of roughly 62.
The number continued rising: about 120, then 130, then 140 beats per minute. Molino told his partner to call an ambulance. Paramedics took him to Monash Medical Centre, where, according to his account, his heart rate reached 210 beats per minute. He said hospital doctors diagnosed atrial fibrillation and restored his rhythm with electrical cardioversion after earlier electrical attempts.
Did the Apple Watch diagnose atrial fibrillation?
No such diagnosis is established by the published account. It describes a heart-rate alert and a later hospital diagnosis reported by Molino; it does not identify the watch model, reproduce an ECG or medical record, or say that the watch recorded an ECG during the episode. The precise alert type and its configured threshold are also not stated.
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![Apple Watch Series 11 [GPS 46mm] Smartwatch with Jet Black Aluminum Case with Black Sport Band - M/L. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/416RQ0rtsUL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
The careful conclusion is that the watch showed Molino an unusually high, rising heart rate and he says that information helped him decide to call for an ambulance. He believes the warning may have saved his life. The article does not establish that the watch detected AFib specifically, or that he would have died without it.
Why the warning mattered
Molino initially thought he was simply overheated. A number that differed sharply from his normal resting rate—and kept increasing—gave him a concrete reason to take his discomfort seriously. The useful part of the watch’s role, as he tells it, was prompting action, not making a diagnosis.
Rank #2
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Rose Gold Aluminum Case with Light Blush Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31caPPnRysL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
That distinction matters. A heart rate of 110 beats per minute can have many causes, and a single reading cannot identify AFib, a heart attack or another condition. Conversely, a normal reading does not rule out a serious problem.
What Apple Watch heart features can and cannot tell you
Apple offers several distinct functions that are easy to conflate. Which are available depends on the watch model, software, region and setup.
Rank #3
![Apple Watch SE 3 [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band - S/M. Fitness and Sleep Trackers, Heart Rate Monitor, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31YiTby0pOL._SL160_.jpg)
- GET SMARTER HEALTH INSIGHTS—Apple Watch SE 3 is an advanced health tracker that helps you better understand your body. The smartwatch sends alerts for an irregular heart rhythm, or an unusually high or low heart rate.* You can view your overnight health tracking metrics with the Vitals app,* track your sleep score, and get sleep apnea notifications.*
- A GREAT FITNESS TRACKER—SE 3 can track your workouts in a healthy number of ways—from running and strength training to simply achieving your 10K steps a day. With real-time metrics and Workout Buddy powered by Apple Intelligence from your nearby iPhone,* you’ll hit your goals like never before.
- KEEP HELP CLOSE AT HAND—SE 3 is a smartwatch that can detect a hard fall or severe car crash and automatically help connect you to emergency services and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- WOMEN’S HEALTH INSIGHTS—SE 3 has advanced sensors that track your wrist temperature while you sleep. With this smartwatch, you can log your periods and symptoms, get period predictions, and get notified of cycle deviations.*
- GREAT BATTERY LIFE AND FASTER CHARGING—Enjoy a smartwatch with all-day, 18-hour battery life* from sunup to sundown. Then charge up to twice as fast as SE 2* and get up to 8 hours of battery in just 15 minutes.*
- Heart-rate readings and high- or low-rate notifications: Show pulse information and can notify a wearer when the rate crosses a configured threshold under the feature’s conditions. A notification is not a diagnosis.
- Irregular-rhythm notifications: Screen for patterns that may suggest AFib; they are not continuous monitoring or a guarantee that an arrhythmia is absent. Apple says this feature is not designed to detect heart attacks and does not guarantee freedom from a health condition. See Apple’s Irregular Rhythm Notification Instructions for Use.
- ECG app: On compatible models, records a single-lead tracing and classifies certain results, such as sinus rhythm, AFib, high heart rate or inconclusive. It is not a general-purpose diagnostic test; see Apple’s ECG Instructions for Use.
- Emergency SOS, Fall Detection and Crash Detection: These are separate emergency features, not heart-rhythm diagnosis. Their ability to call for help depends on device status, connectivity, location and regional support.
These present-day feature descriptions should not be read back into Molino’s 2021 incident: the article does not specify his watch generation, whether it had an ECG sensor, whether an ECG was taken, or whether the watch was connected to a phone or cellular service.
What to do if your heart rate suddenly rises
If a high heart rate comes with chest pain or pressure, shortness of breath, fainting, severe weakness, confusion or other alarming symptoms, contact emergency services immediately. Do not drive yourself if you may be seriously ill, and do not delay getting help to take repeated ECG readings or troubleshoot the watch. Apple’s irregular-rhythm instructions likewise direct users with emergency symptoms to seek emergency care rather than rely on the feature.
Rank #4
![Apple Watch SE 3 [GPS 40mm] Smartwatch with Midnight Aluminum Case with Midnight Sport Band - S/M. Fitness and Sleep Trackers, Heart Rate Monitor, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/31Gq8SToFJL._SL160_.jpg)
- GET SMARTER HEALTH INSIGHTS—Apple Watch SE 3 is an advanced health tracker that helps you better understand your body. The smartwatch sends alerts for an irregular heart rhythm, or an unusually high or low heart rate.* You can view your overnight health tracking metrics with the Vitals app,* track your sleep score, and get sleep apnea notifications.*
- A GREAT FITNESS TRACKER—SE 3 can track your workouts in a healthy number of ways—from running and strength training to simply achieving your 10K steps a day. With real-time metrics and Workout Buddy powered by Apple Intelligence from your nearby iPhone,* you’ll hit your goals like never before.
- KEEP HELP CLOSE AT HAND—SE 3 is a smartwatch that can detect a hard fall or severe car crash and automatically help connect you to emergency services and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- WOMEN’S HEALTH INSIGHTS—SE 3 has advanced sensors that track your wrist temperature while you sleep. With this smartwatch, you can log your periods and symptoms, get period predictions, and get notified of cycle deviations.*
- GREAT BATTERY LIFE AND FASTER CHARGING—Enjoy a smartwatch with all-day, 18-hour battery life* from sunup to sundown. Then charge up to twice as fast as SE 2* and get up to 8 hours of battery in just 15 minutes.*
For a less urgent alert without severe symptoms, stop and assess how you feel; a watch reading can be affected by movement, fit, skin contact and sensor limitations. Do not dismiss a persistent or concerning change just because you feel mostly well. A clinician can determine whether evaluation or a medical monitor is appropriate.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which current Apple Watch models have relevant features?
Apple’s U.S. buying pages list these features and starting prices. Prices are U.S. signals shown on Apple’s pages on August 16, 2026; they can change, and features and availability vary by region and configuration.
Best Value
![Apple Watch Series 11 [GPS 42mm] Smartwatch with Jet Black Aluminum Case with Black Sport Band - S/M. Sleep Score, Fitness Tracker, Health Monitoring, Always-On Display, Water Resistant](https://m.media-amazon.com/images/I/41s72HIk5TL._SL160_.jpg)
- A FULL-FEATURED HEALTH TRACKER—Apple Watch Series 11 gives you invaluable insights about your body, right from your wrist. Take an ECG anytime* and get alerts for a high and low heart rate or an irregular rhythm*—so you can stay closer to your heart. You can also view your overnight health tracking metrics with the Vitals app* and be notified of possible sleep apnea.*
- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
| Model | Relevant features listed by Apple | U.S. starting price | Practical fit |
|---|---|---|---|
| Apple Watch SE 3 | High- and low-heart-rate notifications, irregular-rhythm notifications, Emergency SOS, Fall Detection and Crash Detection; ECG is not listed for this model. | $249 | Lower-cost option for basic heart-rate alerts and emergency features if ECG recording is not a priority. |
| Apple Watch Series 11 | ECG, high- and low-heart-rate notifications, irregular-rhythm notifications, Emergency SOS and Fall Detection. | $399 | Mainstream option for buyers who specifically want ECG as well as heart-rate alerts. |
| Apple Watch Ultra 3 | ECG and heart-rate notifications, plus emergency features and outdoor-oriented hardware, including longer advertised battery life. | $799 | Better suited to buyers who also value ruggedness and outdoor features; its premium hardware does not make its health functions diagnostic. |
For someone considering a watch because of heart monitoring, check the exact model’s feature list and regional availability, wear it consistently with a suitable fit, and enable the notifications they intend to use. GPS-only watches may rely on a paired iPhone for connectivity; cellular models may be more useful away from the phone but require supported service and coverage. Neither cellular service nor Emergency SOS guarantees that help will be available in every circumstance.
What this story can—and cannot—prove
The account is a first-person report, not independent clinical verification. Molino’s published story reports the hospital diagnosis and treatment, but supplies no medical records, ECG tracing, paramedic statement or clinician interview. It also does not give the watch model or alert settings. One compelling experience cannot show how well watch alerts work for everyone: alerts can be missed, readings can be misleading, and some emergencies may produce no alert at all.
A smartwatch can provide a useful signal at a consequential moment, but it is not a clinical ECG, Holter or event monitor, and it is not a substitute for a clinician’s assessment. People with recurring palpitations or a known arrhythmia should ask a clinician what monitoring is appropriate rather than treating a consumer watch as a care plan.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
