In this paper the Authors report the results gained after the treatment of paediatric idiopathic flat foot by means of Pisani's talocalcaneal arthroerisis and arthroerisis with Giannini's endo-orthotic implant. Two groups of patients have been treated according to the two techniques. According to clinical, radiographic and functional tests, the Authors believe that both the techniques can offer good results to correct idiopathic flat foot of childhood and they highlight the lower invasivity and less damage for the structures of sinus tarsi when Pisani's talocalcaneal arthroerisis is applied.
To evaluate the effects of a left ventricular assist device (LVAD) during the reperfusion period following acute coronary occlusion, sixteen mongrel dog hearts were subjected to 1 hour's occlusion of the circumflex coronary artery and then reperfused for 6 hours. In seven control dogs (control group), the hearts were reperfused without any support. In nine LVAD dogs (LVAD group), however, the left ventricles were supported by the application of a pneumatic driven diaphragm-type pump for 5 hours and then reperfused for another hour without any device. Triphenyltetrazolium chloride was used to determine the extent of infarction. The results showed a significant reduction in the area of infarct (AI) as a percentage of the area at risk (AR) in the LVAD group compared with the control group, the AI/AR being 22.3 per cent for the control group versus 4.8 per cent for the LVAD group (p less than 0.05). The cardiac output was also significantly higher in the LVAD group compared with the control group. The per cent systolic shortening in the ischemic region of the LVAD group showed a significantly better recovery, being 75.8 per cent for the LVAD group versus 24.4 per cent for the control group (p less than 0.01). It was concluded that the application of a LVAD during reperfusion after 1 hour's coronary occlusion results in a significant reduction of infarct size and provides improvement in both regional and global cardiac function.
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