These are all excellent questions and they do need to be addressed by his doctor. There are many different reasons he could be having the shortness of breath including ischemia, heart failure and lung problems. Encourage him to follow-up on these things with his doctor and not to worry that he is complaining. Doctors want to hear what the problems are with their patients and then seek appropriate therapy. I hope you find this information useful.
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Only your physician can provide specific diagnoses and therapies. Please feel free to write back with additional questions. The Heart Center website contains a directory of the cardiology staff that can be used to select the physician best suited to address your cardiac problem. Information contained within this forum is intended solely for general educational purposes and is not intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Only your physician can provide specific diagnoses and therapies.