i had heart surgery on march twenty second of this year.  it was for a valve leak repair and mitral valve prolapse.  both were done minervally invesive.  i had an echo and treadmill stress test done yesterday.  it showed a heartrate of 115.  the nurse said she thinks she sees fluid around the heart, but the echo is okay.  they sent me for blood tests .  what will this show and what if they find something with the blood tests.  why is this happening.  i am really scared.
Don't worry about it, its called as pericardial effusion...which sometimes happens after surgery. Sometimes, It will resolve by its own.