رضا بهمنش - Department of Radiology, Faculty of Specialized Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
محمد نصراله زاده ماسوله - Department of Small Animal Internal Medicine, Faculty of Veterinary Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
احسان خاکسار - Department of Small Animal Internal Medicine, Faculty of Veterinary Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
سعید بکایی - Department of Food Hygiene and Quality, Epidmiology and Zoonoses Division of Faculty of Veterinary Medicine, University of Tehran, Iran

Background and aim: Oryctolagus cuniculus are an excellent model for cardiovascular research because the size of these animals is more suitable for study and experimentation than smaller animals and are economical and cost-effective in research. One of the most important diagnostic imaging techniques is echocardiography, which is used today to perform anatomical and functional evaluation of the cardiovascular system and is one of the most accurate and sensitive non-invasive methods for examining heart diseases. Ventricular function indices could be assessed by cardiac imaging techniques. One of these important cardiac parameters is the ejection fraction, which has a valuable position along with other involved parameters. Ejection fraction is a measure of blood percentage that comes out of the heart with each contraction. Materials and Methods: For this study, ۱۰۰ six-month to one-year adult, standard and young Oryctolagus Cuniculus (in Iran) and in healthy   appearance of both sexes (۵۰ female rabbits and ۵۰ male rabbits) were studied without anesthesia and sedation. Results: In this study, the mean ejection fraction in the studied Oryctolagus cuniculus was ۵۸.۷۵۳±۶.۸۸۹ in male animals and ۶۱.۳۹۷±۶.۵۳۰ in females which indicates that the ejection fraction in the assessed male population was significantly higher than the female population. Conclusion: The measured ejection fraction values were comparable to those mentioned in the authoritative books and there is no significant difference in the average size of ejection fraction measured in this study with the previous research.

Echocardiography, Oryctolagus Cuniculus, Ejection fraction, Heart, اکوکاردیوگرافی, خرگوش اهلی, کسر جهشی, قلب