What Causes Shortness Of Breath Despite A Normal EKG Report?

The past few years, I have been experiencing a progressively worsening shortness of breath, syncope, and recently, and many other symptoms that were diagnosed as pulmonary hypertension. I was examined by a cardiologist and a pulmonologist including a couple of EKGs, an electrocardiogram, a sonogram (right term?), etc., but an angiograph proved normal blood pressure in my heart and pulmonary artery and no other heart defects. These two experts are at a loss. What else might it be? I didn t know what PH was, let alone what all of these other conditions might be.