Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. I passed carefully through your question and would explain that a chest X ray study is not the best tool to examine your heart. Considering your symptoms, I would recommend performing further tests: - a cardiac ultrasound - pulmonary function tests to exclude a lung disorder. - complete blood count for anemia - thyroid hormone levels for thyroid gland dysfunction. - blood electrolytes. You should discuss with your doctor on the above tests. Hope I have answered your query. Let me know if I can assist you further.