Do I qualify for 2nd injury fund through workers comp

In 1991 I had a heart attack which led, to a double by-pass operation. In 1996 I was in an industrail explosion where I was employed, this led me to develop PTS to which I take xanax as needed for heart palpitations. In 2004 I was in another industrial accident ( same employer) where I could not breath almost to the point of passing out. With in minutes I experienced a very fast fainting sensation a little later another one. The next day 2 more times. On the 2nd day the same thing but this time it didn't stop I called 911 from work and ended up in the hospital. I was told I had ventricular tachycardia and needed an implanted cardiac defibrillator.This accident led to me being unable to work, I am now on S.S.D.. My question is, I know when I couldn't breath because of lack of oxygen something happened to me that never happened before in my life. I felt a sharpe pain in my chest which made me drop to my knees and later the very fast faint feeling. The hospital said I did not have a heart attack but I do have VT. Staten Iland Heart in New York states on it's web site that changes in oxygen level in the blood can initiate V.T.. Do I have to prove 100% my work related accident is responsible for me going on S.S.D. to qualify for a 2nd fund claim with workers comp? Thank You