Company Spotlight: Eko Health EFAST - Transformers hit the digital stethoscope — AI in Medicine - curated summaries making complex issues easy to understand

We unpack the FDA 510(k) summary for Eko Health's EFAST software, which brings transformer-based AI to the digital stethoscope. Listeners will learn how the cloud-based system analyzes heart sounds and ECGs, its real-world performance numbers for detecting structural murmurs and atrial fibrillation, and the crucial caveats regarding pediatric screening and retrospective testing.

Key points

EFAST is a cloud-based Software as a Medical Device (SaMD) that analyzes 15-second heart sound and ECG recordings via an API, returning a JSON format data structure rather than using a primary display.
For structural murmur classification, EFAST showed an overall sensitivity of 83.4% and specificity of 86.0%, closely matching its predicate device.
Specificity for pediatric patients dropped to 76.0%, which the document notes is likely due to confusion with innocent murmurs.
For atrial fibrillation detection in adults, sensitivity leaped to 94.7% (compared to 73.1% in the older reference device), with a specificity of 94.1%.
Testing was retrospective, and experts excluded 259 out of 2,460 murmur recordings and 97 out of 1,256 ECG recordings because they could not come to an agreement.
Both test datasets heavily skewed White (90.0% for murmurs, 86.6% for ECG), which the FDA summary describes as representative of the intended use population.

Source: FDA 510(k) summary K251494: Eko Foundation Analysis Software with Transformers (EFAST) (Eko Health) - U.S. Food and Drug Administration, 2025

This episode is an AI-generated conversation summarising a public document; the hosts' voices are synthetic. It is for information only and is not medical advice. Always refer to the original source.

Company: Eko Health (ekohealth.com) · Product: Eko Foundation Analysis Software with Transformers (EFAST) · FDA 510(k) K251494

Full transcript: https://ai-in-medicine-podcast.vercel.app/episodes/company-spotlight-eko-health-efast-transformers-hit-the-digital-stetho-989647