I am a 67-year-old, male, I weigh 218 and 5 9 . I am in relatively good health. In May 2011 I was diagnosed with prostate cancer. And in July of 2011 I underwent a prostatectomy. Within less than a week following the surgery, I started having shortness of breath. My primary care physician called to do a follow-up to see how I was doing. When he heard me struggling to talk and breath, he told me to come into his office immediately. I was later diagnosed with a saddled PE that traveled from my leg to my lungs. I was placed on medication for the PE. I no longer take any medication for the PE. Lately, I have experienced shortness of breath. I went to the ER about 2 months ago, and no problems were detected, discovered. But I continue to have shortness of breath with doing things like climbing the stairs at home, tying my shoes, or minor physical activity. I don t have chest pain. My Fitbit shows that my heartrate ranges from mid 50s to upper 90s. I workout at the gym every other day...walking 20 minutes on the treadmill, stationary bike about 10 minutes, and weight lifting. I can go for 60 minutes with no problems. But the shortness of breath comes and goes. Could this be the onset of another PE or something else? Thank you, Gerald Thompkins