Volume 13, Issue 1, Pages (January 2016)

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Volume 13, Issue 1, Pages 98-102 (January 2016) Effect of circadian variability in frequency of premature ventricular complexes on left ventricular function Hatice Duygu Bas, MD, Kazim Baser, MD, John Hoyt, MD, Miki Yokokawa, MD, Troy LaBounty, MD, Fred Morady, MD, Frank Bogun, MD Heart Rhythm Volume 13, Issue 1, Pages 98-102 (January 2016) DOI: 10.1016/j.hrthm.2015.07.038 Copyright © 2016 Heart Rhythm Society Terms and Conditions

Figure 1 Circadian distribution of premature ventricular complexes (PVCs) in patients with and without cardiomyopathy. Shown are the quartile periods of the day with the mean PVC% and the standard deviations per quartile. Heart Rhythm 2016 13, 98-102DOI: (10.1016/j.hrthm.2015.07.038) Copyright © 2016 Heart Rhythm Society Terms and Conditions

Figure 2 Receiver operating characteristic curve for the coefficient of variation (CoV) of 4 time periods of the day (area under the curve 0.74; 95% confidence interval 0.65–0.84, P = .0001). CoV value of 31% had 66% sensitivity and 81% specificity to predict cardiomyopathy. Heart Rhythm 2016 13, 98-102DOI: (10.1016/j.hrthm.2015.07.038) Copyright © 2016 Heart Rhythm Society Terms and Conditions