A friend male 75yrs old withopen heart surgery, done aprox.7yrs ago went to Banos Ecuador, after a few day started vomiting,and very bad dizzines episodes,finally as taken to a local hospital,seems he had a mild stroke he has slurr speach, and willneed pisical therapy on his right side of hisbody my ???IS COULD THE HIGH ALTITUDE CAUSE A RISE OF BLOOD PRESURE. ITS ABOUT 6500FT. I BELIEVE IN THIS AREA. AWAIT YOUR RESPONSE.