The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m 2 or kgÂ·m â1 Â·s â2). This name for the unit was added in 1971; before that, pressure in SI was expressed simply in newtons per square metre.
A leaking mitral valve allows blood to flow in two directions during the contraction. Some blood flows from the ventricle through the aortic valve â as it should â and some blood flows back into the atrium. A leaking (or regurgitant) aortic valve allows blood to flow in two directions.
Mitral regurgitation or mitral insufficiency is a condition in which the mitral valve does not close completely, so it allows blood to flow backward from the left ventricle into the left atrium.atients with mild mitral regurgitation do quite well. In cases of more severe mitral regurgitation, the left heart may grow larger as it needs to accommodate a larger volume of blood, and the patient may eventually become fatigue or weak.