Does she have a history of CHF? There has to be a siginifcant and important reason for that water pill.
Sure get the tests done. Give it a name but watch out for those drugs they will want her to take!
Look into Colostrum from https://www.excellentthings.com/
This will strengthen the heart muscle. 500mg per 50 lbs of weight 2xday.
Next is serrapeptase. This will rotorooter the vessels and reestablish good blood flow. The serrapeptase sold at excellentthings may be good but I get mine from here:
use their Blockbuster Allclear for a few months then you can go to a less expensive serrapeptase product
and and excellent vitamen E product with mixed tocotrinols.
And Antarctic Krill oil.
and my opinion of aspirin is very very low and even 81 mg is now reported to be harmful for some and doubly harmful when combined with certain other drugs.. The serrapeptase will cover that ground as will the vit E.