Hello thanks for posting here. rheumatoid arthritis is a disease of the joints leading to sever pain, swelling and deformity of the joints, mostly affrcting the small joints of the hands and legs ( wrist, fingers and toes). Rheumatoid arthritis also causes a disease affecting the lungs called ILD which i suppose is the cause of your breathing issues. your swollen finger joints are most probably due to rheumatoid arthritis and the associated lung disease. The symptoms of heart disease are chest pain, breathlessness on exertion initially later progressing to breathlessness at rest, fatigue, left arm pain and decreased effort tolerance. since your symptoms are already explained by RA and lung disease i dont think there is an element of heart disease. wishing you good health Regards.