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.
Paroxysmal atrial tachycardia is a type of arrhythmia (irregular heartbeat). Paroxysmal means that the episode of arrhythmia begins and ends abruptly. Atrial means that arrhythmia starts in the atria or upper chambers of your heart. Tachycardia means that the heart is beating abnormally fast. Paroxysmal atrial tachycardia (PAT) is also known as paroxysmal supraventricular tachycardia (PSVT). Other types of tachycardia that start in the atria include atrial fibrillation, atrial flutter, and Wolff-Parkinson-White syndrome. PAT can cause an adultâs heart rate to increase from between 60 and 100 beats per minute to between 130 and 230 beats per minute.