Year: 2022 | Month: October | Volume 12 | Issue 5

Canine Dilated Cardiomyopathy: A Clinical and Diagnostic Study

K.S. Saikrishna K. Jeyaraja S. Vairamuthu Mohamed Shafi P. Selvaraj


Dilated cardiomyopathy (DCM) is an acquired myocardial disorder of dogs characterized by dilation of chambers, hypokinesis and reduced contractility. Echocardiography is a standard diagnostic test for DCM however its technical expertise as well as the cost of equipment, limits its use under field conditions. This paper focuses on the clinical, hematobiochemical, radiographic and electrocardiographic changes in fifty-two dogs affected with dilated cardiomyopathy. Among the clinical signs recorded, exercise intolerance, lethargy, dyspnea, ascites, and cough were commonly seen followed by edema and syncope. Cardiomegaly is the characteristic finding seen on lateral thoracic radiograph measured as a significant increase in vertebral heart score, along with pulmonary edema and rarely pleural effusions as a sequel to congestive heart failure. Among the hematobiochemical findings, anemia and neutrophilic leukocytosis were noticed with non-significant increase of ALP, BUN, and creatinine. In the present study common arrythmias recorded were atrial fibrillation while the common morphological change noticed was ST coving indicative of myocardial hypoxia.


  • Overt DCM is commonly expressed as exercise intolerance, lethargy, and dyspneainitially with gallop rhythm on cardiac auscultation.
  • Increased VHS, pulmonary edema on thoracic radiography.
  • Sinus tachycardia and atrial fibrillation on ECG are common.

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