What is the most logical next event?

How to treat heart conditions in doberman pinschers
Get your doberman screened for the condition.
Dcm affects young to middle aged dogs. It is now known that early treatment with a drug called pimobendan before symptoms develop can protect the heart in dogs that have dcm.
Therefore it's important to screen your doberman for the condition even if they show no signs. Pimobendan is proven to increase survival times by improving the ability of the heart to contract.