Special Forces

I went into the Army in 1973 with a known disability (Heart Murmur) While in the army I was stationed at Fort Carson in 1981, while at work I was walking to the Motor Pool and passed out. The Ambulance took me to the hospital and the did test on me to include a Holter Monitor but were unable to catch anything on tape. After that I was never able to run PT without being winded. I went on for another couple years and ETS in 1985. In 1986 I had another episode of passing out, I went to the VA hospital in Reno, Nv. They did test and diagnosed me Super Ventricular Tachycardia. I have since had two Heart Oblassions and take a lot of meds to keep my heart from running away. When I applied for disability I was only rated for my back injury. Should'nt they have rated me for my heart condition being aggravated?