Sorry to hear about your situation, had a friend who's pet got hit by this as well. The outlook is not good, the best thing you can do is make the next few weeks/months the best for your pet.
Here is more information if you want to know more:
Heart Failure In Your Dog - Cardiomyopathy
Yes, to your question. I am a small animal practitioner here in NW Houston. I am so sorry to hear about your pet's diagnosis:sad:. DCM is a common heart ailment in Dobies, it is believed to be a familial, and probably dominant trait in this particular breed. There are four common clinical presentations of DCM - occult DCM, Congestive Heart Failure (CHF), Cardia arrhythmia, and sudden cardiac death. I am sure that your veterinarian has recommended a full cardiac workup that includes Chest Radiographs, CBC, Chemistry, Echo, ECG, and Blood Pressure. In my clinical experience, it has been very important to have the Echo (ultrasound of the heart) performed in order to determine wall thickness, volume, and flow in order to determine how efficient the heart is working. It is also important in these case to have ECG run in order to determine if there are any underlying arrhythmias to be dealt with -- many can have syncope events and different rhythm disturbances. Is your pup having any signs of Congestive Heart Failure? (lethargy, depression, weakness, coughing, exercise intolerance, dependent edema, anorexia, etc). As far as medications are concerned, most deal with protection of the myocardium and management of serous arryhthmias. This management is different if the case is occult or in clinical heart failure. I hope this information helps, if you need any more information please feel free to write more or PM me.
Sincerely,
CloneSolo, DVM