Cardiovascular response of human diving reflex on heart rate variability [Elektronski vir] = Kardiovaskularni odziv potapljaškega refleksa na variabilnost frekvence srca
Pungerčar, Erika ; Križmarić, Miljenko
Uvod Na spremembo frekvence srca (HR) vpliva parasimpatično in simpatično živčevje, katerega se ugotavlja s pomočjo komponent spektralne gostote (LFnizke frekvence, HF-visoke frekvence, VLF-zelo ...nizke frekvence). Ugotavljali smo variabilnost frekvence srca (HRV) med potopom z dihalko, potopom na dah in mirovanjem. Metode V raziskavo smo vključili 10 preiskovancev, katerim smo s Task Force monitorjem merili hemodinamične parametre v mirovanju (2 minuti), med potopom z dihalko (2 minuti) in potopom na dah, pri temperaturi vode 16,2° C. Rezultati Na podlagi merjenja hemodinamičnih parametrov med potopom z dihalko, med potopom na dah in v mirovanju, smo ugotovili da se HRV komponente (LF, HF in VFL) spreminjajo. V mirovanju je LF-RRI najvišji, med potopom z dihalko in med potopom na dah pa pade. HFRRI je med mirovanjem in potopom z dihalko isti, medtem ko med potpom na dah pade. Diskusija in zaključek Potapljaški refleks vpliva na znižanje frekvence srca, zmanjša pretok krvi in s tem dotok kisika organom, ki so odpornejši na takšne pogoje delovanja. Parasimpatični in simpatični živčni sistem vplivata na aktivnost frekvence srca, kar se kaže v njeni variabilnosti.
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