The Effect of Coconut Water (Cocos Nucifera L.) and an Isotonic Drink on the Change of Heart Rate Frequency in the Rats Induced Hypertension

The objective of the present study was to evaluate the effect of coconut water (Cocos nucifera L) and an isotonic drink on the changes of heart rate frequency in the rats induced hypertension. Wistar male rats were divided into five groups: a negative group, a mineral-watered group, a coconut-watered group, a group with isotonic drink, and a group with medicine. The rats were induced hypertension by administering NaCl solution high concentration for 14 days, and then they were treated with the test materials given to each group for another 14 days without stopping the induction. Their heart rate was measured using a tail cuff before the induction (d0), at the beginning of the treatment (d14), and at the end of the treatment (d28). When being induced hypertension, higher heart rate frequency was significantly showed by the groups with coconut water and isotonic drink (p<0.05) compared with the control group. When the rats of coconut water group were treated with coconut water, their heart rate became significantly lower (p<0.05) compared to the control groups. When the rats of isotonic drink group were treated with isotonic drink, their heart rate was lower, although not significant, than the control groups. The results showed that coconut water (C. nucifera L) lowered the heart rate frequency better than the isotonic drink.