Hi there, Thanks for writing in. I am a qualified and certified cardiologist and I read your question with diligence. A normal chest x-ray in fact does not exclude the possibility of PE (Pulmonary Embolism). You are taking broncho dilators, are you a patient of bronchial asthma? Do you smoke? Is your shortness of breath occurs at rest even or it is always related to exertion. Later could be suggestive of coronary artery disease. Poor r wave progression can be suggestive of chronic pulmonary obstructive disease, coronary artery disease or a non specific finding. Inverted p wave in II, III avF are more specific and can occur either because of junctional rhythm or left atrial rhythm. I hope your fasting blood sugar would have been done by now. Do you get up from sleep because of shortness of breath and gasping or for passing urine and found that you are short of breath? Please list your symptoms in chronological order and then relate the reports of various tests you have, healthcaremagic.com will be able to help you in more effective manner then. Best Wishes. Dr Anil Grover