IPhone heart monitor put to the test for QT interval accuracy

NCT ID NCT02241252

Completed Diagnosis Sponsor: University of Oklahoma Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether an iPhone ECG device (AliveCor) can accurately measure the QT interval of the heart compared to a standard 12-lead ECG. Researchers studied 29 hospitalized patients starting medications that can affect the QT interval. The goal was to see if the iPhone recording could reliably detect the same electrical changes as the traditional method.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: AliveCor iPhone ECG device
What this could lead to: If successful, this could show that a simple iPhone ECG can reliably monitor QT intervals, potentially enabling easier heart monitoring outside the hospital.
What could go wrong: This is a very small, early validation study with only 29 participants. It only tests one specific measurement and may not apply to other heart conditions or broader populations.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

Arrhythmias, Cardiac ventricular arrhythmias due to cardiac ryanodine receptor calcium release deficiency syndrome

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CARDIAC ARRHYTHMIA QT INTERVAL, VARIATION IN

Contacts and locations

Locations

University of Oklahoma Health Sciences Center

Oklahoma City, Oklahoma, 73104, United States

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