A circadian pattern of occurrence of ventricular tachycardia and atrial fibrillation is present during periods of analgosedation
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KeywordsPublic Health Atrial Fibrillation Sine Frequency Distribution Emergency Medicine
Ventricular tachycardia (VT) and atrial fibrillation (AF) are the single most frequent arrhythmias (ARRHY) in our ICU. The present study investigated whether there is a circadian variation in the onset of these ARRHY in critically ill patients in a medical cardiologic ICU which also admits cardiac surgery patients.
The distribution of VT and AF episodes across the day in critically ill patients is nonuniform. The distribution of VT episodes follows a sine wave function showing a peak in the early afternoon between 1 and 2 pm. The circadian variation and its representation by a sine wave function is less clear for the onset of AF episodes. Most striking, the circadian variation is present even during periods of analgosedation.