Suggest Treatment For High Blood Pressure And Chest Pain

my 22 yr. old son has been experiencing high blood pressure which according to charts he is in stage 1 hypertension. The latest reading was 151 over 93. The last 2 weeks he s experienced something not right in his upper left shoulder/chest area. (uncomfortable or light pain) He did see his doctor (a family physician) and had a EKG done. His doctor stated that he has some constriction going on therefore the blood flows back. she put him on some blood pressure pills (I don t recall the name) to calm the vessels. Our history is as follows: His great grandfather died of a heart attack at age 49, his great uncle who was in his sixties died of a heart attack, his grandmother had Chronic kidney disease in her fifties (she had to go on dialyis) and she did have a stroke. I am the mother and also have Kidney disease like my mother. I am concerned about my son. My son has to go back in two weeks to have some blood work done. I m just wondering if this is enough testing. Could there be a blockage? Should he see a cardiologist?