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This study was designed to evaluate the effects of total extract of Phytolacca Decandra on electrophysiological properties of atrioventricular node. Male rat heart after isolation was attached to a Langendorff perfusion system. The stimulation protocol was carried out during control condition (No intervention) and on the presence of selected concentration (1.10-7 %w/v, 2.10-7 %w/v, 5.10-7 %w/v) of Phytolacca Decandra. The basic (Wenchebach, AVCT and ERP) and functional (Recovery) properties of AV-node were studied in solated, perfused male rat cardiac preparations. Total extract of P.decandra significantly increased WBCL, AVCT and ERP in the concentration dependent manner, but had no significant effect on the time constant of recovery. The results of this study demonstrate that total extract of P.decandra had parasympathic-like effect on time-independent properties of AV-node and the above results also showed a potential anti-arrhythmic role of P.decandra in terminating supraventricular tachyarrhythmia.

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Background and Objective: Control of postoperative pain is one of the most important stages in the recovery of patients after surgery. This study was done to compare the effectiveness of combined Ondansetron and Apotel on the post-operative pain after surgery of upper limb fractures.
Methods: This double blind clinical trial study was done on 50 individual (41 male and 9 female) with upper limb fractures referring to 5 Azar hospital in Gorgan northern Iran during 2017. Patients were assigned (block randomization) into control and intervention groups. After the end of operation in the recovery phase, both groups received pain PCA (Patient Controlled Analgesia). In control group, the pain pump consisted of 2 grams of Apotel and in the intervention group; the pain pump consisted of 2 grams Apotel and 8 mg of ondansetron. Visual Analogue Score (VAS) was evaluated in both groups after surgery for 24 hours. Pain score of patients compared in the 2 groups during the 3 time intervals after surgery.
Results: 4 hours after upper limb fracture surgery, the mean pain was significantly decreased in the intervention group (3.20±0.707) compared to control group (3.64±0.569) (P<0.05). 12 hours after upper limb fracture surgery The Mean pain, in the intervention group (1.88±0.927) was significantly reduced in compare to control group (2.64±1.186) (P<0.05). 24 hours after upper limb fracture surgery, The Mean pain was significantly reduced in the intervention group (1.40±0.645) in compare to control group (2.08±0.997) (P<0.05).
Conclusion: This study showed that administration of compination of Apotele and Ondansetron in post-operative pain of upper limb fractures is effective than apotele alone.