Your Smartwatch Could Detect a Hidden Heart Problem! 😱❤️

Your heart can slip out of rhythm without you feeling a thing, and the watch on your wrist might be the first to notice. In this 3D-animated explainer we break down atrial fibrillation (AFib) and how smartwatches screen for it: 0:00 Your watch noticed 0:13 Can a smartwatch catch AFib? 0:25 What is atrial fibrillation? 0:49 Why detecting it matters 1:11 Symptoms 1:32 Normal ECG vs. AFib 1:55 Two different technologies 2:14 How PPG detection works 2:36 How the smartwatch ECG works 2:59 How accurate is it? 3:25 What a smartwatch ECG can't do 3:48 How to take a good reading 4:08 What to do after an AFib alert 4:39 Who benefits most 5:01 Treatment overview 5:31 Pros and cons of smartwatch screening 5:50 Your turn Myths busted: "A smartwatch can diagnose AFib" · "No alert means my heart is healthy" · "A watch ECG is the same as a hospital ECG" · "AFib isn't serious if I feel fine" · "Only older people get AFib" Question of the day: in the Fitbit Heart Study, about 1% of all wearers got an alert, but 4% of those over 65. Would you give a smartwatch to an older parent or grandparent? Tell us why in the comments! This video is for education only and is not medical advice. A smartwatch cannot diagnose AFib. If you have chest pain, fainting, or signs of a stroke, call emergency services. #AFib #AtrialFibrillation #SmartwatchECG #HeartHealth #TheTheoryOfEveryTech Sources : *AFib basics, 300-600 chaotic atrial impulses per minute, irregular ventricles:* standard cardiology teaching; CDC "About Atrial Fibrillation" — https://www.cdc.gov/heart-disease/abo... *About 60 million people with AF/flutter worldwide (59.7 million, 2019):* Global Burden of Disease 2019 analysis — https://www.ncbi.nlm.nih.gov/pmc/arti... *AFib raises stroke risk about fivefold:* Wolf et al., Framingham Study, Stroke 1991 — https://pubmed.ncbi.nlm.nih.gov/1866765/ ; CDC page above *AFib causes about 1 in 7 strokes, and those strokes tend to be more severe:* CDC page above *Clots usually form in the left atrial appendage:* CDC; ESC 2024 AF guideline (LAA closure section) — https://www.acc.org/latest-in-cardiol... *Symptoms (racing/fluttering heartbeat, breathlessness, tiredness, dizziness, chest discomfort), episodes that come and go, many have no symptoms:* NHS — https://www.nhs.uk/conditions/atrial-... *Stroke risk is raised regardless of symptoms (silent AF):* Heart Rhythm Alliance patient information; review literature — https://www.ncbi.nlm.nih.gov/pmc/arti... *Normal ECG vs. AF (no P waves, fibrillatory baseline, irregularly irregular R-R):* standard ECG criteria; ESC 2020/2024 AF guidelines *How PPG works (green LEDs + photodiodes, blood absorbs green light), checks while still:* Apple — https://support.apple.com/120276 ; Macworld summary of Apple's explanation — https://www.macworld.com/article/2253... *Notification only after repeated irregular readings (5 of 6 tachograms within 48 h):* Perez et al., Apple Heart Study, NEJM 2019;381:1909-1917 — https://escholarship.org/uc/item/5n08... - *Apple Heart Study: 419,297 participants, 0.52% notified, 84% PPV of a notification against a simultaneous ECG patch:* Perez et al., NEJM 2019 (link above) *Fitbit Heart Study: 455,699 participants, 1% notified (4% of those 65+), 98% PPV:* Lubitz et al., Circulation 2022 — https://pmc.ncbi.nlm.nih.gov/articles... ; MGH press release — https://www.massgeneral.org/news/pres... *ECG app accuracy: 98.3% sensitivity for AF, 99.6% specificity, on classifiable recordings; 87.8% classifiable (about 1 in 8 not):* FDA De Novo DEN180044 (2018) — https://fda.innolitics.com/device/DEN... ; later version K201525 — https://fda.innolitics.com/device/K20... *Diagnosis must be confirmed by a clinician (12-lead ECG or monitor):* 2023 ACC/AHA/ACCP/HRS AF guideline — https://pubmed.ncbi.nlm.nih.gov/38033... ; ESC 2024 AF guideline *What to do after an alert / when to call emergency services:* NHS (link above); Apple (links above) *Who benefits (65+, hypertension, diabetes, heart failure, sleep apnoea, previous stroke):* ESC 2024 guideline key points (link above); CDC risk factors (link above) *Younger people: endurance athletes and alcohol ("holiday heart"):* BJSM review on AF in athletes — https://bjsm.bmj.com/content/38/2/230 ; The Conversation — https://theconversation.com/holiday-h...