Category: E

Recurring episodes of unstable ventricular tachycardia or ventricular fibrillation within 24 hr of a first life-threatening arrhythmia.  

A stimulus resulting from initiation of or cessation of a flow of electrons as from a battery, induction coil, or generator.  

The presence or absence of a receptor to the hormone estrogen on breast cancer cells. Tumors that possess receptors either to estrogen alone or to both estrogen and progesterone are more responsive to estrogen-blocking agents such as tamoxifen than are tumors that lack these receptors.  

Staphyloma in the equatorial region of the eye.  

The period in which an exanthem appears.    

A tubular hypomineralized structure extending a short distance from the dentinoenamel junction into enamel, seen in ground sections of teeth.  

In people who have had laryngectomies, the modulation by the pharynx, mouth, and tongue of air expelled from the esophagus to produce speech.  

A short, funnel-shaped tube, tubular or bivalve (the former being preferable), used to examine the external auditory canal and eardrum.  

Any noise made during cardiac systole by the valves of the heart or the root of the aorta.  

The location on the skin where an implanted device (e.g., a surgical drain) leaves the body.