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the power to hold, retain, or contain, or the ability to absorb; usually expressed numerically as the measure of such ability.
closing capacity (CC) the volume of gas in the lungs at the time of airway closure, the sum of the closing volume and the residual volume. See also closing volume.
decreased intracranial adaptive capacity a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as the state in which intracranial fluid dynamic mechanisms that normally compensate for increases in intracranial volumes are compromised, resulting in repeated disproportionate increases in intracranial pressure in response to a variety of noxious and nonnoxious stimuli.
diffusing capacity see diffusing capacity.
forced vital capacity the maximal volume of gas that can be exhaled from full inhalation by exhaling as forcefully and rapidly as possible. See also pulmonary function tests.
functional residual capacity the amount of gas remaining at the end of normal quiet respiration.
heat capacity the amount of heat required to raise the temperature of a specific quantity of a substance by one degree Celsius.
inspiratory capacity the volume of gas that can be taken into the lungs in a full inhalation, starting from the resting inspiratory position; equal to the tidal volume plus the inspiratory reserve volume.
maximal breathing capacity maximum voluntary ventilation.
thermal capacity heat capacity.
total lung capacity the amount of gas contained in the lung at the end of a maximal inhalation.
virus neutralizing capacity the ability of a serum to inhibit the infectivity of a virus.
vital capacity (VC) see vital capacity.
1. integrated circuit
2. intensive care
inter cibum (between meals)
Vaughan Williams classificationCardiology The system by EM Vaughan Williams, used to categorize effects of antiarrhythmics by class. See Antiarrhythmic drugs. Cf Sicilian Gambit.
Vaughan Williams Classification of Antiarrhythmic Drugs
Class I Sodium-channel blockers
IA Moderately slow conduction, moderately prolonged duration of action potential–active in atria, ventricles; most cardiotoxic group
Examples Quinidine, procainamide, diisopyramide
IB Minimally slowed conduction, shortened duration of action potential–active in atria; greatest potential for proarrhythmias
Examples Lidocaine, mexiletine, tocainamide, phenytoin
IC Markedly slowed conduction, minimally duration of action potential–active in atria, ventricles; most effective group
Examples Flecainide, encainide, propafenone, moricizine
Class II Beta blockers–active in AV nodes, ventricles; virtually no proarrhythmic effect
Class III Potassium-channel blockers; prolonged duration of action potential
Examples Amiodarone, bretylium, sotalol, ibutilide
Class IV Calcium-channel blockers–active in AV nodes; virtually no proarrhythmic effect
Abbreviation for intracardiac.