hello Mr.Jarad Maryott
well to health care magic
your wife already has been operated to sort out one of her valve problems putting her at a higher risk of getting heart problems because already her heart has a problem.
from her symptoms she might be suffering from some block in the heart she needs a cardiology work up done, like get a ecg done with troponin
levels to rule out heart attack
needs an echo done with other cardiac markers to be done as well.
suggest take your wife to see a cardiologist for full workup and appropriate treatment please do not delay.
wish your wife a quick recovery.