Many reasons: There are many reasons for this and the best thing is to get a full workup by your doctor. Causes when EKG and CXR normal: drug use, anxiety, recent lung infection like pneumonia or bronchitis, smoking (anything), reflux disease, coronary vasospasm, subtle cardiac rhythm abnormality not caught on EKG, and others.
Answered 8/11/2014
3.8k views
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question