but they are believed to be rare and contribute only a small portion of the SCD burden. Normally, there is no electrical activity (flat ECG) between ventricular depolarization (reflected by the ...

This is called WPW-alternans. The accessory pathway that is exists is refractory on an alternating basis creating this appearance. This is a relatively rare ECG finding.

This is called WPW-alternans. The accessory pathway that is exists is refractory on an alternating basis creating this appearance. This is a relatively rare ECG finding.

Unlike the Circular Ring 2 and many Android smartwatches, the Rare lacks ECG functionality. There's no mention of battery life, but like the Ring Air, Ultrahuman's newest smart ring should offer ...