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brandonb
9,346karma·1,335submissions·January 17, 2011
about
Data for good.
Co-Founder at Empirical Health (https://empirical.health). Don't die of heart disease.
Before: Co-Founder @ Cardiogram (ML for heart health)
CTO at Sift Science (YC S11, machine learning to fight fraud)
Data Science @ UCSF Cardiology
HealthCare.gov rescue team
Google (Android speech recognition, search ads ML)
brandonb.cc
recent activity (1,335 total)
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Correct -- the abstract will be included in a special issue of Circulation:
http://circ.ahajournals.org/content/136/Suppl_1/A21042 The study was presented at the Americ…
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I'm one of the co-founders of Cardiogram and involved in this study -- happy to answer questions if folks have them! (EDIT: heading to bed, but will answer questions in the morning!)
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If you don't want to wait, we launched a study with UCSF Cardiology which showed 97% accuracy at detecting atrial fibrillation in May: https://itunes.apple.com/us/app/ca…
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I'd guess it's a 136 thousand run rate, and there's just a typo in the article. $136 million would really be something.
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This looks quite cool. Let me know if you'd like any feedback on the API.
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(Cardiogram co-founder here) 97% refers to c-statistic (area under the ROC curve).
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Is it possible you're talking about blood oxygen saturation?
http://www.cultofmac.com/320322/apple-watch-sensors-are-capa... …
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You'll find most most medical algorithms pretty disappointing. :) For example, the algorithm in implantable cardioverter defibrillators generates unnecessary shocks in 1 in 6 patients. Its accura…
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Full journal publication is coming--as you likely know, the system doesn't always move as fast as we'd like. > quick back of the envelope calculation a positive test result is still 5× mo…
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This is exactly right—the benefit is to prevent strokes by detecting undiagnosed atrial fibrillation.
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Circulation published a nice review this week on the rationale for atrial fibrillation screening:
circ.ahajournals.org/content/135/19/1851.full?ijkey=StzSPk8eljGaP2G&keytype=re…
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Thanks! You can use the Cardiogram app today to understand your heart rate data:
https://itunes.apple.com/us/app/cardiogram/id1000017994?ls=1... We'll be incorpora…
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First validation study is on atrial fibrillation, although we've had users who have discovered other arrhythmias through the app. Here's on example of a person who discovered supraventricula…
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Here, 97% accuracy refers to a c-statistic (area under the ROC curve) of 0.9740. An example operating point would be 98% sensitivity with 90% specificity. For reducing false positives, rather than sta…
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(Cardiogram Co-Founder here) Let me know if any of you have questions on the study, app, or deep learning algorithm. My colleague Avesh wrote a post with a little more technical detail here:
https:&#…