When excess fluid collects in the sac (pericardium) surrounding the heart, doctors refer to this as pericardial
effusion. It may be caused by inflammation of the pericardium (pericarditits). Signs and symptoms of pericardial effusion may include:
Fluid retention (edema)
...LOW BLOOD PRESSURE... High pb is not a factor, but that doesn't rule out the medical condition, shortness of breath, dizziness or fainting, chest pain, cough, fast heart rate or heart palpitations.