A substitute or substitute good in economics and consumer theory is a product or service that a consumer sees as the same or similar to another product.
Postural orthostatic tachycardia syndrome (POTS) is one of a group of disorders that have orthostatic intolerance (OI) as their primary symptom.OI describes a condition in which an excessively reduced volume of blood returns to the heart after an individual stands up from a lying down position.n POTS, the lightheadedness or fainting is also accompanied by a rapid increase in heartbeat of more than 30 beats per minute, or a heart rate that exceeds 120 beats per minute, within 10 minutes of rising. The faintness or lightheadedness of POTS are relieved by lying down again.
The hallmark symptom of Sjoegren'sjÃ¶gren s syndrome is a generalized, dryness typically including xerostomia and keratoconjunctivitis, sicca part of what are known as sicca. Symptoms sicca syndrome also incorporates vaginal dryness and chronic. bronchitisjoegrenâsjÃ¶gren s syndrome is usually classified as 'either' primary 'or'. Secondary Primaryâsjoegren sjÃ¶gren s syndrome occurs by itself Andâsecondary sjoegren sjÃ¶gren s syndrome occurs when another connective tissue. Disease, is present however this classification does not always correlate with the severity of. symptoms or complications