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                        How many years can a person go with hypertension before stroke, heart disease, or renal failure occur.  If I am a 58 yr. old Black Male, and have gone 10 years with it being usually between 180/100 and 212/105, and have been told the cause is unknown, what is most likely to happen in the years to come? I've had no problems with it.  I exercise, am not overweight and use low salt though.  If stress is the factor, then what?  How much could medicine extend my life? Side effects?