Shunt lesions in the septum separating the two atrial chambers are among the most common congenital heart malformations. It is in most cases associated with morbidity and mortality. A 12-year-old mixed-breed female canine was referred for a detailed examination due to symptoms, such as exercise...

Congenital heart diseases occur due to morphological and functional changes, caused by malformations that persist after birth, with the animal at risk of sudden death or hemodynamic repercussions. The defect of the atrial septum is a disease with little occurrence, but of great importance,...

A 1.2-year-old male-intact Standard Poodle underwent transvenous placement of an Amplazter™ atrial septal occluder for correction of a large secundum atrial septal defect. Thirty-six hours post-operatively, the dog developed high-grade Mobitz type II second-degree atrioventricular block, which...

An American Pit Bull Terrier with history of ostium secundum atrial septal defect correction, by the time of surgery the patient presented dyspnoeic, normal capillary refill time and rectal temperature, exercise intolerance and delayed development compared to other dogs of the same age or from the...

A 5-year-old male toy poodle was referred for corrective surgery of an atrial septal defect. A sinus venosus-type atrial septal defect (ASD) with partial anomalous venous connection, suspected pulmonary hypertension, and pulmonary edema was confirmed by radiography, echocardiography, and cardiac...

Background: Portosystemic shunt and atrial septal defect (ASD) are generally congenital diseases in dogs. Rarely, dogs with congenital vascular anomalies could be related to other vascular anomalies. Case Description: A 1-year-old male Maltese dog, neutered and weighing 1.7 kg, was brought in for...

Atrial septal defects have been well reported in humans and dogs and the principles of intervention have been well established. In contrast, there is very little information published about these congenital anomalies in horses. True ASDs are regarded as rare and little is known about the clinical...

Trifoliate left atrioventricular (AV) valve with common atrioventricular junction is considered part of the spectrum of atrioventricular septal defect. This valve morphology is typically associated with defects in the AV septum resulting in communication at the atrial or ventricular level, but has...

Background: Atrial septal defect (ASD) is a rare congenital cardiac disease, and there have been no reports about the treatment of ASD in midget breed dogs. Case Description: A 7-month-old female toy poodle weighing 1.4 kg presented with cardiac enlargement. Echocardiography revealed a...

Congenital alterations of the heart and large vessels (CAHLV) are defined as morphological defects associated with birth and are the most frequent congenital anomalies of domestic animals. The aim of this study was to determine the frequency of CAHLV in dogs in Rio Grande do Sul, with emphasis in...