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A chronobiological study on the relation between heart rate and QT interval duration in newborn infants


, : A chronobiological study on the relation between heart rate and QT interval duration in newborn infants. Chronobiologia 17(3): 195-200

The relation between heart rate and QT interval is the result of the autonomic nervous system control on cardiac function in healthy adults; accordingly, chronobiological studies have shown that adult subjects have circadian rhythms of heart rate (expressed as R-R interval) and QT interval in phase. We have employed chronobiological methods to study heart rate and QT interval relation in 10 newborn infants, who are known to have an immature cardiac control. Findings from this study indicate that not all the newborns show circadian rhythms of heart rate and QT interval and that when both rhythms are present they do not correlate like in the adults. Likely, this lack of relationship between heart rate and QT interval in newborns is due to different maturational stages of the newborns studied. As a practical implication, in newborn infants, mathematical correction of QT interval by heart rate is not a reliable method.

US$29.90

PMID: 2226047


Other references

Astiasaran I.; Sanchez Monge J.M.; Bello J., 1989: Study of the linear correlation between chemical and physical parameters used in the color evaluation of heat treated meat products. The lineal correlation between a physic parameter, the stability index of red color (IE), and a chemical parameter, the percentage of chemical conversion of total pigments in nitrous pigments (CQ), in hot-processed meat products have been studied....

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Bruce, AJ., 1983: Further information on Apopontonia dubia Bruce (Decapoda, Pontoniinae). Crustaceana (Leiden): 452: 210-213

Kvale G.; Bjelke E.; Heuch I., 1986: Occupational exposure and lung cancer risk. The importance of occupation held longest as a risk factor for lung cancer was examined in a prospective study in Norway of 11,995 men, among whom 125 cases occurred in a follow-up from 1966 through 1978. Based on information about occupation held...

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Maier, S.S.; Pelin, I.; Bulacovschi, V., 2008: Study on an injectable biomimetic hydroxyapatite--atelocollagen composite. The paper presents a procedure for preparing mineralized collagen nanofibrils, mixed with deficient nanoparticulate calcium hydroxyapatite in a ratio close to that found in living bone structures. Such a composition might represent an injectable o...

Iglesias S.G., 1987: Comparative study of the virulence of two different strains of aujeszky's disease virus. The aim of this work was to produce evidence of difference in the virulence of two strains isolated from a pseudorabies outbreak. The strains had different behavior in tissue culture, the strains were denominated S and R, for syncitia forming and...

Khatta, V.; Katoch, B.S., 1981: Nutrient components of some forages available in the sub-mountainous region of Himachal Pradesh. Samples from 6 cultivated fodders and 14 local grasses were collected at the initiation of flowering from a high rainfall mountainous zone (Palampur and Dharamsala) and from a hot humid shivalik zone (Jawalamukhi) in Himachal Pradesh. Barley and C...

L'Herminé, C.; Chastanet, P.; Delemazure, O.; Bonnière, P.L.; Durieu, J.P.; Paris, J.C., 1989: Percutaneous transhepatic embolization of gastroesophageal varices: results in 400 patients. During a 7-year period, bleeding esophageal varices were treated by means of percutaneous transhepatic embolization in 400 cirrhotic patients, including 258 patients with Child's class C cirrhosis (65%) and 142 patients with Child's clas...

Masse, L.; Tingaud, R.; Masse, C.; Sentucq, M.; Sentuc, R.Gal, F., 1964: On The Influence Of Therapy On The Remote Outcome Of Arteritis Caused By Overload. Statistics From A Hospital Service. Bordeaux Chirurgical 1: 39-44