Valves

The mitral valve is a valve that allows blood flow from one chamber of the heart, the left atrium, to another called the left ventricle. In mitral valve prolapse, the valve slips backward due to the abnormal size of or damage to the mitral valve tissues. Mitral valve prolapse is a common cause of a heart murmur caused by a "leaky" heart valve. For most people with mitral valve prolapse, the cause is unknown. It can be caused by conditions in which cartilage is abnormal (connective tissue…

septum, and four main valves with which the blood makes its directional flow into and out of the heart. Deoxygentated blood with which the blood flows into and out of the organ. Deoxygenated blood enters through the venae cava fills the right atrium (RA) and right ventricle (RV) through the tricuspid valve. Then, RV contracts pushing the blood to pulmonary circuit and returns oxygenated from the lungs and travels to left atrium (LA) and left atrium (LA) through the mitral valve. Left ventricle…

Introduction Mitral valve regurgitation, also called mitral regurgitation, is a condition in which blood leaks from the mitral valve in the heart. The mitral valve is located between the upper left chamber of the heart (left atrium) and the lower left chamber of the heart (left ventricle). Normally, this valve opens when the atrium pumps blood into the ventricle, and it closes when the ventricle pumps blood out to the body. Mitral valve regurgitation happens when the mitral valve does not close…

The mitral valve (MV) plays a crucial role in cardiac function, controlling blood flow between the left atrium and left ventricle. The components of the valve include an anterior leaflet, a posterior leaflet, tendinous chords, papillary muscles, and a saddle shaped annulus at the atrioventricular junction.[1] Deviation in the morphology of any of these components of the valve may result in comprised mechanical integrity of the valve and abnormal leaflet closure.[1] With studies suggesting that…

Clinical Context and Experience On 9/20 and 9/30 I completed my third and forth shift on 7 West at Sharp Memorial Hospital. Although these were not my first shift on the unit they were my first shift with my regular preceptor Elle. The first two shifts I was working with Laura who was my temporary preceptor, while Elle was on vacation. The first night was calm because of low census and the second night it was a bit busier throughout the night. On our first shift together we were the resources…

approach has beenevolving and is changing the face of medicine. Transcatheter Valve Replacement (TVR), is apercutaneous technique that uses fluoroscopic guidance to replace a diseased or dysfunctionalvalve without ever having to go under the knife. To be able to intervene percutaneously is the“most exciting advancement in the treatment of valve disease” (Kenny & Hijazi, 2013, p795).The pulmonary valve and aortic valve are two valves that can be treated or replaced in thecatheterization lab…

the method to study the pressure valve…

regurgitation (MR) which affects 200,000 people every year in the US alone. The Mitral valve is a key site of failure due to its location between the left atrium and left ventricle, it prevents the backflow of oxygenated blood into the atrium during ventricular systole and constantly experiences high pressures. MR is the backflow of blood into the atrium and pulmonary veins due to the partial or complete mitral valve failure. This failure is rated on a scale from 0 to 4, 4 being severe. MR can…

the breed being modified to become a short nosed dog with a very rounded skull similar to the popular pug; there are some common health problems that King Charles spaniels suffer from which include: * Mitral valve disease which is a condition that causes degeneration of the mitral heart valve that can be fatal for most dogs. All cavaliers should be screened for heart murmurs once a year beginning at age 1 year due to the commonness of the disease in the breed as it is the leading cause of…

A drill pipe non-return valve (NRV) is essential in MPD operations. A U-tube analogy demonstrates that any positive unbalance in the annulus will result in forcing fluid up the drill pipe. [4] Referred to as a float, the NRV is usually driven by a piston. During circulation, drilling fluid forces the valve open against the spring. When pumps are off the valve is closed through a combination of the spring and wellbore pressure. [2] Figure 2.7c Rig layout for MPD operations (KCA Deutag Source…