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Vectorcardiography was developed by E. Frank in the mid 1950s. [2][3] Since the human body is a three-dimensional structure, the basic idea is to construct three orthogonal leads containing all the electric information. The three leads are represented by right-left axis (X), head-to-feet axis (Y) and front-back (anteroposterior) axis (Z).
MDCalc is a free online medical reference for healthcare professionals that provides point-of-care clinical decision-support tools, including medical calculators, scoring systems, and algorithms. [1] MDCalc is also a mobile and web app. [2] The decision-support tools are based on published clinical research, [3] and MDCalc’s content is ...
SARS. severe acute respiratory syndrome. SB. small bowel (see small intestine) SBE. subacute bacterial endocarditis. SBFT. small bowel follow through. SBMA.
Lead augmented vector left (aVL) has the positive electrode on the left arm. The negative pole is a combination of the right arm electrode and the left leg electrode: = (+) = Lead augmented vector foot (aVF) has the positive electrode on the left leg. The negative pole is a combination of the right arm electrode and the left arm electrode:
List of abbreviations used in medical prescriptions. This is a list of abbreviations used in medical prescriptions, including hospital orders (the patient-directed part of which is referred to as sig codes). This list does not include abbreviations for pharmaceuticals or drug name suffixes such as CD, CR, ER, XT (See Time release technology ...
Medical usage. In medical diagnosis, test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate). If 100 patients known to have a disease were tested, and 43 test positive ...
Abbrev. Meaning Latin (or Neo-Latin) origin ; a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night ...
human anti-chimeric antibody. HACE. High-altitude cerebral edema. HACEK. acronym for a group of bacteria that are a frequent cause of endocarditis in children. HAD. HIV-associated dementia. HADS. Hospital Anxiety and Depression Scale.