क्यों खडे होते समय चक्कर व आंंखो के सामने अंधेरा आता हैं ?

This video is made for the awareness for the Orthostatic Hypotension condition . The lots of reason for the high heat beat, palpitations, weakness,and all the reason are not included in this video.if any one face this condition which is in this video please consult a professional a Doctor.
Note:- This video is not for medico legal purpose.
Thank you