Most people are either born with a deviated septum or get it as a result of an injury, but there are multiple other causes. Learn more. The septum in the heart, also known as the cardiac septum , is a muscular wall that separates the heart into left and right sides. It is essential for the proper functioning of the cardiovascular system. Deviated Nasal Septum A deviated nasal septum is a common condition that can significantly impact one's quality of life. The nasal septum is the bone and cartilage that divides the nasal cavity into two nostrils. When it is deviated or off-centre, it can cause a range of issues, from difficulty breathing to chronic sinus infections. In this comprehensive guide, we will delve into the causes, symptoms, diagnosis, and treatment options for a deviated nasal septum . We will also explore ...