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ECG waveform Cardiomatics catalog of ECG events: Sinus rhythm – the normal heartrhythm is the sinus rhythm generated by the physiological pacemaker, the sinus node. Sinus tachycardia – sinus rhythm above 100 bpm is a sinus tachycardia. AFIB/AFL – atrial fibrillation or atrialflutter episodes.
REM Sleep: Each percent increase in nightly REM sleep duration was associated with a lower risk of atrial fibrillation, atrialflutter, and bradycardia (an abnormally slow heartrhythm).
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