Renal Artery Stenosis
What is Renal Artery Stenosis? Renal artery stenosis is a condition where one or both of …
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REM Rebound Effect
What is REM Rebound Effect? Rapid eye movement (REM) sleep, or the REM rebound effect, is …
Relapsing Fever
What is Relapsing Fever? Relapsing fever is a disease similar to malaria that regularly causes fever, …
Refsum Disease
What is Refsum Disease? Refsum disease was first explained by Sigvald Refsum in 1945, originally named …
Reflux Nephropathy (chronic pyelonephritis)
What is Reflux Nephropathy (chronic pyelonephritis)? Reflux nephropathy (RN), a condition that damages the kidneys, typically …
Reentrant Arrhythmias
What is Reentrant Arrhythmias? Tachyarrhythmias, a type of heart disorder where the heart beats too quickly, …
Rectus Sheath Hematoma
What is Rectus Sheath Hematoma? A rectus sheath hematoma is a rare condition that usually happens …
Rectovaginal Fistula
What is Rectovaginal Fistula? A fistula is an unnatural connection that forms between two layers of …
Rectocele
What is Rectocele? Rectocele is a type of condition known as pelvic organ prolapse (POP), where …