[Cardio-Ankle Vascular Index and Subclinical Peripheral Atherosclerosis in Patients With Stable Coronary Artery Disease].

Aim: To study relationship between cardio-ankle vascular index (CAVI) and subclinical manifestations of noncoronary atherosclerosis in patients with stable ischemic heart disease (IHD).

Material And Method: We included into this study 511 patients with IHD examined within framework of a register of patients before aorto-coronary bypass surgery. CAVI was determined using VaSera-1000 device.

[Role of multidetector computed tomography and stress- echocardiography in assessment of risk of cardiological complications of non-cardiac surgery].

Aim: to compare results of coronary angiography with data of multi-slice computed tomography (MSCT) - angiography, and analyze rate of detection of hemodynamically significant coronary artery lesions during preoperative examination of patients.

Material And Methods: We analyzed case histories of 92 patients (median age 59 years) examined prior to surgery on non-coronary vessels or for exclusion of ischemic heart disease. All patients were subjected to selective coronary angiography (CA) and MSCT - angiography.

Somatic versus dendritic resonance: differential filtering of inputs through non-uniform distributions of active conductances.

Synaptic inputs to neurons are processed in a frequency-dependent manner, with either low-pass or resonant response characteristics. These types of filtering play a key role in the frequency-specific information flow in neuronal networks. While the generation of resonance by specific ionic conductances is well investigated, less attention has been paid to the spatial distribution of the resonance-generating conductances across a neuron.

Effects of cooperative ion-channel interactions on the dynamics of excitable membranes.

Cooperative interactions between ion channels are known to exist, but have so far received relatively little attention in the study of excitable membranes. Based on bifurcation analysis and stochastic simulations of an extended Morris-Lecar model, we show that cooperativity and anticooperativity can modify the range of sustained firing and cell-intrinsic noise, induce multistability, and account for a number of experimental observations, including prolongation of action-potential duration. We hypothesize that channel interactions could be an efficient mechanism to regulate the activity of neurons or cardiac muscle cells.

Polytypism and oxo-tungstate polyhedra polymerization in novel complex uranyl tungstates.

Three new uranyl tungstates, α-, β-Cs(2)[(UO(2))(2)(W(2)O(9))], and Rb(6)[(UO(2))(7)(WO(5))(2)(W(3)O(13))O(2)], have been obtained by high temperature solid state reactions. All three compounds display novel structure topologies: α- and β-Cs(2)[(UO(2))(2)(W(2)O(9))] are based upon layers with a new topology that can be related to the uranophane topology; Rb(6)[(UO(2))(7)(WO(5))(2)(W(3)O(13))O(2)] is a rare example of a non-molecular inorganic phase with layers containing oxo-tungstate trimers. The structural relationship between α- and β-Cs(2)[(UO(2))(2)(W(2)O(9))] can be assigned to polytypism.