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===Incorrect ECG data===
 
===Incorrect ECG data===
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1. Ensure that you are taking the measurements correctly [[TeltoHeart_First_Start#Recording_an_ECG | Recording an ECG]]<br>
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2. During ECG measurement, stay calm and do not make any movement.<br>
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3. Make sure electrodes are not dirty. Dirt, sweat, or other debris on the sensors can interfere with the ECG readings. Clean the sensors and the area around them regularly with a soft, dry cloth.<br>
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4. Excessive hair on the wrist may hinder the performance of optical sensors. Ensure the skin beneath the device is free from obstructions for accurate readings.
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5. If you have higher melanin levels, it can sometimes affect the accuracy of certain types of sensors, including those used for ECG monitoring.<br>