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Aritel is Angiotensin Receptor Blocker
(ARB) - it has no direct effect on the block..
Embeta is a Beta blocker
(BB) - it may rarely increase the block!
But these drugs have effects beyond the pressure - ARB on re-modelling / BB on rate, angina
and so on. It is not clear why they were prescribed in your case... Probably, it is not the block.
Life style changes like diet and exercise help in general / they do nothing for the block.
You need to see your doctor.
You need further investigations as to the reason for the syncope
.- then only proper treatment can be advised. Simple RBBB will not do this...
Wishing speedy recovery