Reference : Dependency of Premature Ventricular Contractions on Heart Rate and Circadian Rhythms ...
Scientific journals : Article
Human health sciences : Pediatrics
Human health sciences : Cardiovascular & respiratory systems
http://hdl.handle.net/2268/99262
Dependency of Premature Ventricular Contractions on Heart Rate and Circadian Rhythms During Childhood
English
Massin, M. M. [> > > >]
Maeyns, K. [> > > >]
Withofs, Nadia mailto [Centre Hospitalier Universitaire de Liège - CHU > > Médecine nucléaire >]
Gérard, Paul mailto [Université de Liège - ULg > Département de mathématique > Statistique (aspects expérimentaux) >]
2000
Cardiology
93
1-2
70-3
Yes (verified by ORBi)
International
0008-6312
[en] PrPremature ventricular contraction ; Arrythmic pattern ; Heart rate ; Circadian rhythms
[en] The aim of the present study was to identify and quantify the rate dependence of premature ventricular contractions (PVC) during childhood. A 24-hour Holter recording was performed in 16 consecutive children, aged 22 days to 11 years (mean age 5.6 years), with frequent (>5,000/day), isolated monomorphic PVC. Those PVC were identified and the length of the preceding sinus cycle was measured. The values were ordered into 50-ms class intervals, and the percentage of PVC for each class was calculated and then analyzed by linear regression analysis. On the basis of the significance of the p value, and the positive or negative value of the slope, we identified a tachycardia-enhanced, a bradycardia-enhanced, and an indifferent pattern. Chronobiologic analysis was made by the cosinor method. All the patients had upper and lower limits of cycle length beyond which PVC disappeared. A tachycardia-enhanced pattern was present in 7 patients and an indifferent one in 9 patients. In the latter a second-degree polynomial correlation was systematically found. Children but not infants had a significant circadian variation in the frequency of PVC with a very variable time of highest incidence. In conclusion, it is possible to identify a circadian rhythm of PVC and a spontaneous trend between their incidence and the length of the preceding cardiac cycle in children.
http://hdl.handle.net/2268/99262

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