HUBUNGAN ANTARA BESARNYA PAPARAN KUAT ARUS LISTRIK BOLAK-BALIK (AC) DI AIR TERHADAP KERUSAKAN OTOT JANTUNG TIKUS WISTAR

Abstract

Background : Electrical injuries are damages on human bodies that leave burnt marks and can even cause organs impairment when a person is directly exposed to an electrical current. The factors determining the severity of electrical injury are electrical intensity, type of circuit, duration, resistance of tissues, voltage, amperage and pathway of current.. Cellular damages due to electrical shock depends on several mechanisms such as direct injury of electroporation, muscle tetany, heat and mechanical injury. All these mechanisms will then lead to organ failure. Objective : To determine the relation of various AC electricity exposure in water and the severity of myocardial impairment in wistar rats Method : This was an experimental study using The Post Test Only Control Group Design. 15 Wistar rats samples were devided into 3 groups, that was 5 rats for each group. The P1, P2 groups were given 220V of voltage, 50mA and 100mA of current. The K1 group was not given any procedures, as for control/standard; The P1 and P2 groups was exposed to electricity for 10 seconds. Statistical analysis was done using Kruskal Wallis and Post Hoc ( Mann Whitney ). Result : Nonparametric Kruskal-Wallis test revealed significant differences for all three groups of hyperemia (Kruskal-Wallis Test P = 0,000). The mean value for control group was 5,60 ± 0,548 (means ± SD). The largest mean value was from P2 group (means ± SD 12,00 ± 0,707 ). Mann-Whitney U Test revealed significant differences between control group and P1 group (Mann-Whitney U Test P = 0,006), control group and P2 group (Mann-Whitney U Test P = 0,007), P1 group and P2 group (Mann-Whitney U Test P = 0,018). Conclusions : There was a severity of myocardial impairment in relation between the groups that were given AC electricity in water and the groups that were not given AC electricity in water, and between each group that were given AC electricity in water with various exposure duration. The staging of histopathological changes in myocardium cells that were found hyperemia. Keywords : electrocution, electrical injury,myocardium,current