Intracardiac and pulmonary hemodynamics and arterial blood gases in patients with chronic stable angina pectoris associated with chronic obstructive pulmonary disease

Aim. To study intracardiac and pulmonary hemodynamics and arterial blood gases in patients with chronic stable angina pectoris associated with chronic obstructive pulmonary disease (COPD). Material and methods. The study included 103 patients: 49 people with Functional Class II chronic stable angina pectoris and COPD, plus 54 individuals with COPD only. Arterial blood gases, left and right ventricular (LV, RV) diastolic function (echocardiography with colour Doppler ultrasound), and right heart pressure levels (right heart and pulmonary artery (PA) catheterisation) were assessed. Results. The patients with chronic stable angina pectoris associated with COPD were characterised by progressing RV and LV diastolic dysfunction. In contrast to patients with isolated COPD, RV diastolic dysfunction was more pronounced in participants with combined pathology. In both groups, pulmonary hemodynamics was characterised by equivalent increases in systolic, diastolic, and mean PA pressure (Stage I). The manifestations of this increase were determined by the COPD stage. Conclusion. Combined cardio-respiratory pathology was characterised by progressing RV andLV diastolic dysfunction. In both groups, the factors with the strongest correlation with pulmonary hypertension included arterial hypoxemia, hypercapnia, and RV diastolic dysfunction

Highly Crystalline WO3 Nanoparticles Are Nontoxic to Stem Cells and Cancer Cells

Tungsten oxide sol, containing highly crystalline nanoparticles of orthorhombic WO3 and having good sedimentation stability, was synthesized using a facile, ultrasonic-assisted technique. An additional steric stabilizer, dextran, was proposed to enhance the stability of WO3 nanoparticles in biological media and to reduce their in vivo toxicity. The cytotoxicity of dextran-stabilized and nonstabilized WO3 sols was studied in vitro using dental pulp stem (DPS) cell lines and breast cancer (MCF-7) cell lines. Both tungsten oxide sols demonstrated low cytotoxicity and low genotoxicity for both stem cells and malignant cells and only slightly reduced their metabolic activity in the concentration range studied (from 0.2 to 200 μg/ml). The data obtained support possible theranostic applications of tungsten oxide colloidal solutions