Caitlyn, I can guarentee you that your brother felt no pain what so ever. My son Dairik passed 3 weeks ago of Hypertrophic Cardiomyopathy and this is what was told to us by the cardiologist..Please take comfort in knowing this more than likely pertains to your brother Joe also. ... He had a pre existing condition of an enlarged heart- likely since birth. Nothing anyone would have ever known- unless there were symptoms. The doctors say what happened was 1 in 1,000. Once the heart skips a beat it try's to make up for
that moment and goes into shock which creates an arrhythmia (it beats way too fast for the body to handle) the saving grace with this type of condition is that there is no thought process- no pain- no realization as to what was even going on. The last thing Dairik will ever remember is exactly what he was touching or doing. He had not a single clue that anything was going to happen so in turn there was no shock no being scared no regrets no feeling... What so ever.