Category: S

A prolapsed hemorrhoid that is trapped by the anal sphincter, thus compromising blood flow to the vein in the hemorrhoid.  

A hemorrhage occurring some time after primary hemorrhage, usually caused by sepsis and septic ulceration into a blood vessel. It may occur after 24 hr or when a ligature separates, usually between the 7th and 0th days.  

Hemiplegia resulting from a lesion of the spinal cord.  

Increased muscular tone occurring in half of the body. It results from an upper motor neuron lesion, such as a stroke, central nervous system trauma, or tumor.  

A hemorrhage between the arachnoid membrane and the pia mater; usually caused by the rupture of a congenital intracranial aneurysm or berry aneurysm, hypertension, or trauma.  

A spiral fold of the mucous membrane lining the cystic duct of the gallbladder. It keeps the lumen open.  

A form of atrioventricular block in which only some atrial impulses are conducted to the ventricles. Two variants exist: Mobitz I (Wenckebach) and Mobitz II. In Mobitz I, the P-R intervals become progressively longer until a QRS complex is dropped. Because of the dropped beats, the QRS complexes appear to be clustered (“grouped beating”) on…

Hearing loss that occurs in 72 hr or less. It may be temporary or permanent. Some of the most common causes include cerumen impaction, medication toxicities, acute infections, ear trauma, Meniere’s disease, and ischemia.  

A ring of choroidoretinal atrophy around the head of the optic nerve, a condition that may occur in the aged.  

Specialized epithelial cells with hairlike processes.