We evaluated the efficacy of automated lamellar therapeutic keratoplasty (ALTK SystemÂ®; Moria/Microtek Inc., Doylestown, Pennsylvania, USA) in the treatment of various corneal disorders affecting the anterior to mid-stroma.
Whatâs the problem? Pulmonary regurgitation (PR, also called pulmonic regurgitation) is a leaky pulmonary valve. This valve helps control the flow of blood passing from the heart to the lungs. A leaky pulmonary valve allows blood to flow back into the heart chamber before it gets to the lungs for oxygen.
The heart is basically a pump. The heart is made up of specialized muscle tissue, called the myocardium. The heart's primary function is to pump blood throughout the body, so that the body's tissues can receive oxygen and nutrients and have waste substances taken away.Like any pump, the heart requires fuel in order to work. The myocardium requires oxygen and nutrients, just like any other tissue in the body.However, the blood that passes through the heart's chambers is only passing through on its trip through the body-this blood does not give oxygen and nutrients to the myocardium.he heart is basically a pump. The heart is made up of specialized muscle tissue, called the myocardium. The heart's primary function is to pump blood throughout the body, so that the body's tissues can receive oxygen and nutrients and have waste substances taken away.