my 25 years old son diagnosed with SVT.He is also suffering weight loss problem.In october 2009 when he was diagnosed with svt his weight was 45 kgs now his weight is 39 kgs only.Almost lost 06 kgs.is this problem related with thyroid malfunctioning or stress or this is linked with choclate,tea and cola drinks.The latest SVT episode was happened 02-05-2110.Pls,pls answer the situation and suggest any test or medication to overcome this problem.
There is only two episodes in last six months.