background : left ventricular (lv) dyssynchrony is a prevalent feature in heart failure (hf) patients. the current study aimed to evaluate the prevalence of inter and intraventricular dyssynchrony in hf patients with regard to the qrs duration and etiology. methods: the available data on the tissue doppler imaging (tdi) of 230 patients with refractory hf were analyzed. the patients were divided...

one of the main problems in dynamic customer segmentation is finding the dominant patterns of customer movements between different segments via time. accordingly, we concentrate on the customer dynamics in this paper and try to find different groups of customers in transmissions between segments via time. the dominant characteristics of these groups are also investigated. to obtain this objecti...

objective(s) definite diagnosis of hirschsprung’s disease (hd) is based on histopathological study, but there are limitations associated with standard histology and histochemistry in this regard. the aim of this study was to investigate calretinin immunostaining patterns in both ganglionic and aganglionic hd intestinal specimens and to compare them with control specimens. materials and methods ...