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iPhone 12s displayed in Shanghai, China, in April 2020. Photo: Wang Gang/VCG via Getty Images

A study published in the Journal of the American Heart Association this week found that the iPhone 12's magnetic charging system may interfere with cardiac implantable electronic devices.

Why it matters: Authors of the study said the phone's Magsafe charging technology can produce a magnetic field strong enough to potentially "inhibit lifesaving therapy" if placed directly on the skin over one of the implantable devices.

How it works: The team of researchers studied the charger's affects on 11 different types of CIEDs and found it was able to trigger "magnet reversion mode" in the devices.

  • In pacemakers, this means the device is pacing at an asynchronous rate while the mode in implantable cardioverter defibrillators may suspend antitachycardia therapies, which are needed to interrupt a tachyarrhythmia episode.

The big picture: Another study in the Heart Rhythm Journal in January also concluded the charging system can affect CIEDs.

  • Apple has recommended that users with CIEDs keep their devices away from their iPhone 12s and charging accessories by "more than 6 inches / 15 cm apart or more than 12 inches / 30 cm apart if wirelessly charging."

Go deeper

Dan Primack, author of Pro Rata
58 mins ago - Economy & Business

The mental health deal boom

Illustration: Sarah Grillo/Axios

The positive social media response to Simone Biles withdrawing from Olympic competition highlights how the artificial line between health care and mental health care is finally beginning to dissolve. And startup investors have taken notice.

By the numbers: Venture capital investments in mental health startups rose 72.6% between Q1 2020 and Q1 2021, per CB Insights.

U.S. economy grew at a 6.5% rate last quarter, missing expectations

Contractors work on a home under construction. (Photo: Micah Green/Bloomberg via Getty Images)

The U.S. economy grew at an annualized 6.5% rate last quarter, the government said Thursday — slower than the 8.4% economists expected.

Why it matters: It came as the economy made strides toward further reopening, vaccinations rolled out and government stimulus bolstered spending. But supply crunches held the pace of growth back.

2 hours ago - Sports

U.S. gymnast Suni Lee wins Olympic gold in individual all-around

Suni Lee Photo: Jamie Squire/Getty Images

U.S. gymnast Sunisa "Suni" Lee won Olympic gold on Thursday in the individual all-around event.

The big picture: Simone Biles, who withdrew from the event to focus on her mental health, cheered from the stands with the rest of the women's gymnastics team as they watched Lee and teammate Jade Carey compete. Brazil's Rebeca Andrade won the silver and Russian Angelina Melnikova took the bronze.