Its probably not going to reoccur if you build up slow and dont go all out at first; but if it is blood pressure related or heart which can be the same thing really; A fantastic first aid remedy which balances out any pressure either high or low (low is actually immediatley more dangerous than high) 'to balance either out instantly' is cayene powder or a hot red chilli .chew off an end chew it up and swallow it down with water,or a teaspoon of powder stirred in water it pays to keep some in your kit.can save a life ;so can squashing around your left little finger tip around where the nail grows out from and also the ring finger next to it as well and in the centre of the palm of your hand right underneath and between those fingers (on the heart line)as you breathe long and slow, these moves retrigger off your heart meridian and balance out erregular rythyms.