My father was facing difficulty in deep breathing, and so we did some tests. In his 2D echo test, the EF of LV has come out to be 47% , earlier it was 60%. Is this a serious issue...?? Even though his cardiologist has stated, it's nothing serious, we're worried. Please answer. I've attached the report. He has no chest pain or any other problems in his chest, except the problem i mentioned above.