- When a dog's heart loses the ability to pump efficiently, the kidneys will respond by retaining water and sodium. This can cause a buildup of fluid (i.e., congestion) in the tissues of the dog's limbs, lungs and other organs and bodily systems.
- Heart failure in dogs typically develops gradually. It's usually the result of a heart valve's failure to close tightly. When this heart valve malfunction occurs, the heart stretches to accommodate more blood to pump throughout the body and meet the body's oxygen and nutrient needs. This stretching results in a weakened and thin cardiac muscle, and an inability to efficiently pump blood.
- You rarely see congestive heart failure in dogs younger than 5. The first visible signs include loss of appetite, lethargy, excessive panting, anxiety and weight loss.
- When the body can no longer adjust (through faster or stronger heart beat), your dog might collapse, drool or have a blue-gray tongue. Other symptoms include shortness of breath, excessive coughing, fainting and swelling of limbs or the abdomen because of fluid buildup.
- Be alert for any changes in a dog's behavior. If your dog exhibits behavioral changes or any of the above signs, schedule a visit to the veterinarian. Your veterinarian will likely schedule chest X-rays, blood tests, chest auscultation and electrocardiogram (EKG).
- Congestive heart failure is the result of many years of heart malfunction. There is little you can do aside from diet to slow the disease's progression. However, you can treat the effects of heart failure with various medications, and make your dog's remaining years comfortable.
