Phenylephrine and paradoxically increased muscle tissue oxygenation: is the mechanism related to local venoconstriction or augmented venous return?

contribution of setting to the study of characters and the main idea in e. brontes: wuthering heights and t. hardys: return of the native.

this thesis aims to adduce an unmitigated and comprehensive explication concerning the relationship of three significant elements of fiction: setting, chracter and theme. my research is basically placed on two outstanding novels of the 19th century: emily brontes wuthering heights and thomas hardys return of the native. my endeavour lies in studying the correlation among the three above-mention...

Local factors in tissue oxygenation.

Effects of augmented respiratory muscle pressure production on locomotor limb venous return during calf contraction exercise.

We determined effects of augmented inspiratory and expiratory intrathoracic pressure or abdominal pressure (Pab) excursions on within-breath changes in steady-state femoral venous blood flow (Qfv) and net Qfv during tightly controlled (total breath time = 4 s, duty cycle = 0.5) accessory muscle/"rib cage" (DeltaPab <2 cmH2O) or diaphragmatic (DeltaPab >5 cmH2O) breathing. Selectively augmenting...

Mechanism of decreased venous return with nitroglycerin.

It has been widely accepted that nitroglycerin (NG) causes a redistribution of the myocardial nutritional circulation and the mechanism could account for relief of angina pectoris by NG (1). In addition, some possible other extracoronary mechanism may be affected by a systemic administration of NG. Albad and Mellander (2) and Mason and Braunwald (3), showed that NG has a more pronounced dilator...

Heart rate and the assessment of changes in venous return after phenylephrine.

TO THE EDITOR: The article by Cannesson et al. (1) convincingly explains several analogous changes on dynamic preload variables, which we have only recently been able to monitor noninvasively in daily patient care. Although phenylephrine has been in clinical use for decades, measurements of advanced hemodynamic variables in a beat-to-beat fashion are regrettably much more laborious than simple ...