See Also: diphtheria toxoid(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
toxoid(dictionary)
Toxoid(health)
toxoid(encyclopedia)
toxoid(medicine)
Diphtheria(health)
diphtheria(dictionary)
diphtheria(dictionary)
Diphtheria(medicine)

A-V malformation (medicine) and diphtheria toxoid (medicine)


A-V malformation (medicine)


A-V malformation -->
arteriovenous malformation
<anatomy, embryology> A tangled collection of abnormal blood vessels where there is an abnormal communication between the arterial and venous systems. The afferents flow directly into the venous efferents without the usual resistance of an intervening capillary bed.

They are mostly congenital. If large enough, they may produce a shunt of sufficient magnitude to raise the cardiac output.

Common sites include; skin, liver, brain, brainstem and spinal cord, where they may cause headaches, seizures or bleeding (subarachnoid haemorrhage).

See: arteriovenous fistula, cerebral arteriovenous malformations.

Synonym: haemangioma


diphtheria toxoid (medicine)


diphtheria toxoid


The formaldehyde-inactivated toxin of corynebacterium diphtheriae. It is generally used in mixtures with tetanus toxoid and pertussis vaccine (dtp) or with tetanus toxoid alone (dt for paediatric use and td, which contains 5- to 10-fold less diphtheria toxoid, for Other use). Diphtheria toxoid is used for the prevention of diphtheria; diphtheria antitoxin is for treatment.