117 KB35 KB199420251998Meglič, Dušankaletnik:37številka:4str. 497-514ISSN:0025-8121COBISSID:9992921URN:URN:NBN:SI:doc-AQUXBQOYslMedicinski razglediMedicinski razglediAutonomic nervous systemBlood pressureChildheartHeart function testsHeart rateotrociPathologyPhysiologysrcesrčna frekvencaStandardstestiranjeValsalva's maneuverStandardizacija nekaterih kardiocirkulatornih testov pri zdravih otrocih| Standardization of some cardiovascular tests in healthy children|Tests of cardiovascular reflexes and heart rate variability are reliable and noninvasive and therefore useful in children with suspected autonomic nerve dysfunction. The aim of this study was to calculate normal reference values and investigate the relationship between cardiovascular reflex ratios, gender and age. A batery of cardiovascular tests was performed in 81 healthy children, aged 7 to 16 years. The Valsalva, deep breathing, handgrip and orthostatic ratios were calculated and changes in blood pressure were measuredduring handgrip (diastolic) and orthostatic (systolic and diastolic) tests. Heart rate variability was quantified by spectral analysis for low and high frequency bands (LFB and HFB), and the LFB/HFB ratio was calculated. Normal Valsalva, deep breathing, handgrip and orthostatic ratios and integralsof LFB and HFB were calculated for two-year age groups (e.g. 7-8 yearolds, 9-10-years olds etc.) There was a significant negative correlation between the handgrip ratio, systolic blood pressure during orthostatic test, supine LFB/HFB ratio and age. There was also a significant positive correlation between the supine HFB and age. The deep breathing ratio and HFB integral were signifcantly higher in girls aged 11 to 12 years, and the handgrip diastolic pressure increase was greater in girls 15 to 16 yeras of age. Cardiovascular tests are a safe and reliable tool for the evaluation of autonomic nerve function in children. Since age-related variations are more dynamic in children than in adults, we would recommend that reference values for children be determined in groups of smaller age range (e.g. two years). Also, gender grouping should be done when determining reference values in childrenKlasični kardiocirkulatorni testi in spektralna analiza spremeljivosti srčne frekvence predstavljajo zanesljivo in neinvazivno obliko testiranja delovanja avtonomnega živčevja pri otrocih s sumom na okvare le-tega. Namen te naloge jebil določitev razpona normalnih vrednosti in proučevanje vpliva starosti in spola na rezultate srčnožilnih testov. V raziskavi je sodelovalo 81 zdravih otrok, starih od 7 do 16 let. Razdelili smo jih v 5 starostnih skupin (7 do 8,9 do 10 let...). V vsaki skupini smo testirali 8 deklic in 8 dečkov. Opravili smo že uveden klasične kardiocirkulatorne teste (Valsalvin preizkus, preizkus z globokim dihanjem, test stiskanja pesti, ortostatski preizkus). S spektralno analizo smo določili nizko- in visokofrekvenčni vrh (NFV in VFV) amplitudnega spektra in izračunali razmerje NFV/VFV. Za vsako starostno skupino in spol smo določili razpon normalnih vrednosti za Valsalvin količnik,respiratorni količnik, količnik stiska pesti, ortostatski količnik, spremembe krvnega tlaka pri testu stiska pesti (diastoličnega) in pri ortostatskem preizkusu (sistoličnega in diastoličnega), NFV, VFV ter razmerje NFV/VFV. Statistično pomembne negativne povezave s starostjo smo našli pri količniku stiska pesti, spremembi sistoličnega tlaka pri otostatskem preizkusuinpri razmerju NFV/VFV leže; pozitivno povezavo s starostjo smo našlipri VFV leže. Respiratorni količnik v VFV stoje sta značilno višja pri deklicah v starostni skupini 11 do 12 let, prav tako porast diastoličnega tlaka pri deklicah v starostni skupini 15 do 16 let. Srčnožilno testiranje je varna zanesljiva oblika testiranja funkcije avtonomnega živčevja pri otrocih. Zaradi večje dinamičnosti sprememb pri otrocih priporočamo določanje referenčnih vrednosti v manjših starostnih skupinah kot pri odraslih (npr. na dve leti). Pri določanju normalnih vrednosti je priporočljiva delitev po spoluTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaDruštvo Medicinski razgledi