Severe respiratory failure in a patient with obstructive sleep apnoea was treated successfully with nasal intermittent positive pressure ventilation. Nasal intermittent positive pressure ventilation is a non-invasive method of respiratory support originally developed for the treatment of chest wall and neuromuscular disorders.'2 Recent studies suggest that this technique may be applicable to a ...

In this issue of Circulation: Heart Failure, Drazner et al1 report the findings of their study on the relationship of right and left ventricular (LV) filling pressures in patients with heart failure and preserved LV ejection fraction (HFPEF) (also referred to as heart failure with preserved systolic function, diastolic heart failure). They noted good concordance (79%) in this patient population...

although some 3d slope stability algorithms have been proposed in recent three decades, still role of pore pressures in three dimensional slope stability analyses and considering the effects of pore water pressure in 3d slope stability studies needs to be investigated. in this paper, a limit analysis formulation for investigation of role of the pore water pressure in three dimensional slope sta...