| Abbreviation | Meaning |
| E | ecstasy
electrolytes
Enterococcus
epinephrine
estradiol
estrogen |
| E1 | estrone |
| E2 | estradiol |
| EAC | external acoustic meatus |
| EACA | epsilon-aminocaproic acid |
| EAEC | enteroadhesive Escherichia coli |
| EAF | enteric adherence factor |
| EAM | external auditory meatus |
| EB | epidermolysis bullosa |
| EBRT | external beam radiation therapy |
| EBL | estimated blood loss (see bleeding) |
| EBM | evidence-based medicine
expressed breast milk |
| EBT | electron beam tomography |
| EBV | Epstein–Barr virus |
| EC | enteric coating |
| ECC | endocervical curettage |
| ECD | endocardial cushion defect |
| ECF | extracellular fluid
enteric cytopathic human orphan |
| ECG | electrocardiogram |
| ECM | extracellular matrix |
| ECHO | enteric cytopathic human orphan virus |
| ECI | febris e causa ignota (normally written as febris E.C.I.)
fever of unknown origin |
| ECLS | extracorporeal life support |
| ECMO | extracorporeal membrane oxygenation |
| ECP | emergency care practitioner |
| ECT | electroconvulsive therapy |
| ECTR | endoscopic carpal tunnel release |
| ED | eating disorder
emergency department
erectile dysfunction
ectodermal dysplasia
effective dose
emotional distress |
| EDC | estimated date of confinement (at 40/40 weeks of pregnancy) |
| EDD | estimated date of delivery (at 40/40 weeks of pregnancy); expected date of delivery
estimated date of discharge |
| EDF | end diastolic flow (describing the flow of blood through the umbilical artery) |
| EDH | epidural hematoma |
| EDM | esophageal Doppler monitor |
| EDRF | endothelium-derived relaxing factor aka nitric oxide |
| EDTA | ethylene-diamine-tetraacetic acid |
| EDS | Ehlers-Danlos syndrome |
| EDV | end-diastolic volume |
| EEE | eastern equine encephalitis |
| EEG | electroencephalogram |
| EENT | ears, eyes, nose, throat (see otolaryngology) |
| EEX | electrodiagnosis |
| EF | ejection fraction |
| EFM | electronic fetal monitoring, aka external fetal monitoring (cardiotocograph) |
| EFS | event-free survival |
| EFW | estimated fetal weight |
| EGBUS | external genitalia, Bartholin's glands, urethra & Skene's glands |
| EGD | esophagogastroduodenoscopy |
| EGF | epidermal growth factor |
| EGPA | eosinophilic granulomatosis with polyangiitis (formerly known as Churg–Strauss syndrome) |
| EHEC | enterohemorrhagic Escherichia coli |
| EIEC | enteroinvasive Escherichia coli |
| EIA | external iliac artery External iliac artery |
| EIB | Exercise Induced Bronchospasm |
| EJ | elbow jerk (triceps reflex) |
| EKG | electrocardiogram |
| ELLSCS | elective lower segment caesarean section |
| ELISA | enzyme-linked immunosorbent assay |
| EM | erythema multiforme |
| EMB | ethambutol
endometrial biopsy or endomyocardial biopsy |
| EmBx | endometrial biopsy |
| EMC | encephalomyocarditis |
| EMD | early morning discovery
electromechanical dissociation |
| EMDEX | essential medicines index |
| EMF | endomyocardial fibrosis |
| EMG | electromyography |
| EMLSCS | emergency lower segment Caesarean section |
| EMS | Emergency Medical Service(s) |
| EMU | early morning urine sample (being the most concentrated, generally used for pregnancy testing) |
| Emul | emulsion |
| ENT | ear, nose, and throat (see otolaryngology) |
| EOB | edge of bed |
| EoL | End-of-life (adjective) |
| EoLC | End-of-life care |
| EOM | extraocular muscles |
| EOMI | extraocular movements intact (see eye movement) |
| EPCT | estrogen-progesterone challenge test |
| EPEC | enteropathogenic Escherichia coli |
| EPH | edema, proteinuria, hypertension |
| Epi | epinephrine |
| EPO | erythropoietin |
| EPS | electrophysiology
extrapyramidal syndromes |
| EQ | Empathy quotient |
| ER | emergency room |
| ERCP | endoscopic retrograde cholangiopancreatography |
| ERM | epiretinal membrane |
| ERMS | embryonal rhabdomyosarcoma |
| ERT | enzyme replacement therapy |
| ESA | erythropoiesis-stimulating agent |
| ESHAP | etoposide, cisplatin, cytarabine, methylprednisolone (chemotherapy regimen for relapsed Non-Hodgkin lymphoma) |
| ESI | epidural steroid injection |
| ESL | extracorporeal shockwave lithotripsy (also ESWL) (see lithotriptor);
English as a second language (affects provider–patient communication) |
| ESBL | extended spectrum beta-lactamase (see also gram-negative bacteria) |
| ESM | ejection systolic murmur |
| ESR | erythrocyte sedimentation rate |
| ESRF | end-stage renal failure |
| ESRD | end-stage renal disease |
| ESS | empty sella syndrome
enhanced support service |
| EST | endodermal sinus tumor |
| ESV | end-systolic volume |
| ESWL | extracorporeal shockwave lithotripsy (also ESL) (see lithotriptor) |
| ET | endothelin
endotracheal embryo transfer
Essential thrombocythemia |
| ETEC | enterotoxigenic Escherichia coli |
| Etiol | etiology |
| ETOH | ethanol (ethyl alcohol) |
| ETS | endoscopic thoracic sympathectomy |
| ETT | endotracheal tube |
| EUA | examination under anesthesia |
| EUP | extrauterine pregnancy |
| EUS | endoscopic ultrasonography |
| EVA | enlarged vestibular aqueduct |
| EVAR | endovascular aneurysm repair |
| EVD | external ventricular drain |
| EVF | erythrocyte volume fraction (see hematocrit) |
| Ex-n | previously; used for premature infants that have been born (ex-28 = born at 28 weeks gestation) |
| Exam | examination (for example, physical examination) |
| Exp Lap | exploratory laparotomy |
| Ext | extremities |
