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This is very interesting.
Persistent shortness of breath can be due to the pulmonary embolism
or blood clot in the lung
A VQ scan should be considered.
Since all the blood vessels to the heart could not be fixed, that can be a problem here.
Your heart may not be able to take too much work load due to the compromise in coronary blood flow.
I am not certain what tests exactly were done, but you definitely need a stress echo test or a CT coronary angiogram.
If this is angina related, then anti angina treatment can be considered with Ranolazine, calcium channel blocker etc.
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