Middle-aged adults who need an aortic valve replacement fare better with mechanical devices than with the valves made from ...

we mounted the leaflets such that the hinge areas were exposed to rapidly moving blood, hoping to avoid thrombus formation (Fig. 2c). We implanted several of these modified valves but observed the ...

THE human aortic valve consists of three cusps made of relatively ... and works so efficiently that very little blood is regurgitated at each pulse. In order to support this large pressure ...

Mechanical valves last longer, but blood can clot on them. A patient may need long-term medication that prevents blood clots developing. Biological valves are more likely to wear out.

The researchers reviewed data on nearly 110,000 patients who underwent surgical replacement of aortic valves between the ages of 40 and 79. They found that in those aged 60 or younger, mechanical ...

When functioning normally, this valve allows blood to flow in one direction - from the atrium to the ventricle. MVD occurs when the mitral valve deteriorates and fails to function properly.

Aortic-valve disease severe enough to require definitive ... Hg. P.B.F. = pulmonary blood flow in ml./sec. Comparison of the Mean Pressure Gradient across the Pulmonary Vascular Bed (P.A. Mean ...

Aims Exercise testing remains underused in patients with aortic stenosis (AS), partly due to concerns about an ...