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.
photoShtterSto In. The PR Interval Conduction Overview A s mentioned in the Basic Beat chapter, the PR interval is the interval from the beginning of the P wave to the beginning of the QRS complex.hotoShtterSto In. The PR Interval Conduction Overview A s mentioned in the Basic Beat chapter, the PR interval is the interval from the beginning of the P wave to the beginning of the QRS complex.