Is any heart disease that results in the inability to put out enough blood to meet the dog's needs. It can be caused by the above two diseases, heat stroke, electric shock, injury, infection, developmental heart defects, or high blood pressure. Signs depend on which side of the heart is affected. Left-sided heart failure may result in coughing and difficulty breathing from a build-up of fluid in the lungs (pulmonary edema) and fainting. Right-sided heart failure may result in a build-up of fluid in the abdomen (ascites), fluid around the lungs (pleural effusion), or peripheral edema.
(kidney failure) is common in dogs and may be found in acute or chronic forms. It is defined by a loss of function of about 75 percent of the filtration system of the kidney and characterized by azotemia and low specific gravity of the urine. Acute renal failure can be caused by loss of blood supply, hypercalcemia, or toxins such as ethylene glycol (antifreeze) or aminoglycoside antibiotics. Chronic renal failure can be congenital and/or inherited or caused by cancer, infection, hypertension, glomerulonephritis, amyloidosis, progressive interstitial fibrosis, or any of the causes of acute renal failure.