Key result
The Heartcheck single-lead ECG device was not accurate for measuring QTc-intervals compared to a standard 12-lead ECG, with a mean difference of -31.9 ms.
Why the study?
The study was conducted to assess the diagnostic accuracy of a single-lead portable ECG device for measuring QTc-intervals compared with standard 12-lead ECG.
Does a portable single-lead ECG recorder accurately measure QTc-intervals compared to a standard 12-lead ECG in adult cardiology outpatients?
Cross-Sectional (n=101)
Does a portable single-lead ECG recorder accurately measure QTc-intervals compared to a standard 12-lead ECG in adult cardiology outpatients?
The Heartcheck single-lead ECG device is not accurate for measuring QTc-intervals compared to a standard 12-lead ECG.
Answers are grounded in this paper and cite their sources.
Do not use the Heartcheck device for QTc assessment; leaves open the reliability of single-lead ECGs and requires prospective validation.
BACKGROUND: To assess the diagnostic accuracy of a single-lead portable ECG device for measuring QTc-intervals in comparison with a standard 12-lead ECG. METHODS: Adult patients visiting the cardiology outpatient clinic for a 12-lead recording were also measured with a portable single-lead ECG recorder (HeartcheckTM). QTc-intervals were determined by two cardiologists. Perfect agreement was defined as a limit of ≤10 ms between the two measurement methods. RESULTS: Hundred one ECGs were recorded. QTc-interval mean differences between the two measurement methods was substantially outside our definition of perfect agreement (-31.9 [SD±41.3] ms). CONCLUSION: In conclusion, the Heartcheck single-lead ECG device is not accurate for measuring QTc-intervals.
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Bekker et al. (2019) conducted a cross-sectional in Cardiology outpatient (n=101). Portable single-lead ECG recorder (HeartcheckTM) vs. Standard 12-lead ECG was evaluated on QTc-interval mean differences between the two measurement methods (MD -31.9 ms). The Heartcheck single-lead ECG device was not accurate for measuring QTc-intervals compared to a standard 12-lead ECG, with a mean difference of -31.9 ms.
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