SCIENCE-BACKED MEASUREMENTS
NOT ALL ECG MEASUREMENTS
ARE THE SAME
Here, we want to explain how measurements taken by conventional smartwatches differ from the medical-grade data collected by TeltoHeart.
SMARTWATCH OR TELTOHEART?
Wearable devices that monitor heart activity may look similar, but the ECG data they record and the amount of information they provide can differ significantly. Most smartwatches record a single-lead ECG, capturing the heart’s electrical activity from one direction and producing one ECG signal.
SMARTWATCH - 1 Derivation
One electrical direction → one ECG signal → one perspective on the heart’s electrical activity
Teltoheart - 6 Derivation
Six electrical directions → six ECG signals → a more comprehensive view of the heart’s electrical activity
TELTOHEART USES EINTHOVEN’S TRIANGLE
TeltoHeart features specially positioned electrodes that create three electrical contact points during a measurement, forming Einthoven’s triangle. This principle enables the device to record three standard leads—I, II, and III—and derive three additional augmented leads—aVR, aVL, and aVF—from their electrical potentials. Together, these six ECG views provide a more comprehensive picture of the heart’s electrical activity than a single perspective.
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WHY ARE MULTIPLE ECG LEADS IMPORTANT?
The heart’s electrical activity moves in different directions as an impulse travels through the atria and ventricles. ECG leads capture this activity along different axes, so the same heartbeat may appear differently in each lead.
A change that is less noticeable in one lead may appear more clearly in another. Multiple leads therefore provide more information for ECG evaluation.
