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A fistula is defined as a communication between two major organs. A Rectovaginal Fistula (RVF) is a tract or hole between the rectum and the vagina. It allows the involuntary passage of faeces from the rectum through the vagina. Watch The Doctors TV: Rectovaginal Fistula explained.
Brain Dural Arteriovenous Fistula (BDAVF). The word âfistulaâ means abnormal connection between two structures that are normally not connected. An arteriovenous fistula is an abnormal connection between an artery and a vein.Any part of the body can have a fistula. The brain is surrounded by a tough fibrous cover called âdura materâ or âduraâ.When a fistula forms between an artery and a vein within the dura, it is called Brain Dural Fistula, or Brain Dural Arteriovenous Fistula, or BDAVF, etc.ny part of the body can have a fistula. The brain is surrounded by a tough fibrous cover called âdura materâ or âduraâ. When a fistula forms between an artery and a vein within the dura, it is called Brain Dural Fistula, or Brain Dural Arteriovenous Fistula, or BDAVF, etc.