Faculty of Veterinary Medicine, Urmia University Veterinary Research Forum 2008-8140 16 12 2025 12 01 Diagnostic imaging of ventricular septal defect in an Iranian Shall lamb 713 717 731822 10.30466/vrf.2025.2046929.4564 EN Javad Abbasi Department of Animal and Poultry Health and Nutrition, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran Institute of Biomedical Research, University of Tehran, Tehran, Iran 0000-0003-3143-3178 Mohammadreza Mokhber Dezfouli Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran Institute of Biomedical Research, University of Tehran, Tehran, Iran 0009-0001-6112-7975 Alireza Vajhi Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran Institute of Biomedical Research, University of Tehran, Tehran, Iran 0000-0002-8048-7124 Sirous Sadeghian Chaleshtori Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran Institute of Biomedical Research, University of Tehran, Tehran, Iran Peyman Dehghan Rahimabadi Department of Clinical Sciences, Ka.C., Islamic Azad University, Karaj, Iran Mohammad Reza Esmailinejad Department of Clinical Science, Faculty of Veterinary Medicine, Shahid Bahonar University of Kerman, Kerman, Iran Omid Zehtabvar Department of Basic Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran 0000-0002-4343-4453 Mohammad Nouri Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran Institute of Biomedical Research, University of Tehran, Tehran, Iran Journal Article 2025 01 06 Ventricular septal defect (VSD) is a common congenital anomaly in large animals, but it is rarely documented in small ruminants. This report described a case involving a three-month-old male lamb of the Iranian Shall breed that was presented to a Veterinary Hospital of University of Tehran with nasal discharge and growth retardation. Clinical examination revealed a heart rate of 120 beats per min, a respiratory rate of 50 breaths per min, pale mucous membranes and a low-grade pansystolic murmur that was auscultated bilaterally in the thoracic region. Echocardio-graphy revealed a 10.00 mm defect between the right and left ventricles, located in the supraventricular region behind the aortic valve, along with evidence of left-to-right shunting. Imaging studies including echocardiography and radiography indicated increased cardiac volume particularly in the right ventricle. These findings were corroborated by necropsy. This case study aimed to elucidate the imaging findings associated with Ventricular septal defect in an Iranian Shall lamb. https://vrf.iranjournals.ir/article_731822_bbfff4cbfd589121061cf40ce2744cd7.pdf