Assess the effect of the following on the accuracy of the recorded ECG compared to a gold standard ECG:~Posture or position of the patient~Movement~Amount of hair on the ECG site~Skin condition (tone/dryness) Ability to detect a paced rhythm accurately A qualitative assessment of ECG devices, including the amount of artefact in the signal and ease of use of the device
To compare the accuracy of novel smartphone or wearable ECG devices to a gold standard ECG in patients with normal and abnormal ECGs.