Anyone here suffer from it? Just been reading about it. Had to hurriedly lie on the kitchen floor earlier as I was about to faint for the first time in my life. Decidedly worrying as I am being investigated for various heart issues at present. I did check my blood pressure within a few mins of standing up again (I didn't lose consciousness but it all went black and I would have fallen over). It was normal but my heart was racing. Anyway, I understand that the above could cause my symptoms and the reason I've latched onto it is that I have been suffering from right shoulder pain which has extended up my neck, it has got worst again in the last day or so. I understand that muscle pressing on the carotid sinus can cause the 'almost fainting.'