| VER | <abbreviation> Visual evoked response. See: evoked response. (05 Mar 2000) |
|---|---|
| verapamil | <drug> A calcium channel blocking drug, used as a coronary vasodilator and antiarrhythmic. Pharmacologic action: Calcium channel blockade, direct, potent negative chronotrope and inotrope, slows conduction in AV node, systemic and coronary vasodilation. Uses: Supraventricular tachycardias. Dose: 2.5 - 5.0 mg IV over 1-2 minutes May repeat at 5.0 - 10 mg every 15-30 minutes until 30 mg total dose. Onset: 3 - 5 min. Potential complications: Hypotension due to vasodilation and depressed contractility. Treat with calcium; bradycardia, AV block can be exacerbated, contraindicated with congestive heart failure, synergistic interaction with beta blockers. Note: Administration of verapamil to a patient with ventricular tachycardia can be lethal. Verapamil can accelerate heart rate and decrease blood pressure, especially in patients with Wolff-Parkinson-White and wide-complex tachycardia. (12 Mar 2000) |
| veratralbine | <chemistry> A yellowish amorphous alkaloid extracted from the rootstock of Veratrum album. Source: Websters Dictionary (01 Mar 1998) |
| veratrate | <chemistry> A salt of veratric acid. Source: Websters Dictionary (01 Mar 1998) |
| veratrate 3-O-demethylase | <enzyme> Forms isovanillic acid from veratric acid; see also record for 4-methoxybenzoate monooxygenase (o-demethylating) Registry number: EC 1.14.99.- (26 Jun 1999) |
| veratria | <chemistry> Veratrine. Source: Websters Dictionary (01 Mar 1998) |
| veratric | <chemistry> Pertaining to, or derived from, plants of the genus Veratrum. <chemistry> Veratric acid, an acid occurring, together with veratrine, in the root of white hellebore (Veratrum album), and in sabadilla seed; extracted as a white crystalline substance which is related to protocatechuic acid. Source: Websters Dictionary (01 Mar 1998) |
| veratric acid | C9H10O4; 3,4-Dimethoxybenzoic acid;obtained by methylation and subsequent oxidation of protocatechuic acid; present in the seeds of Schoenocaulon officinale (Sabadilla officinarum). (05 Mar 2000) |
| veratridine | <chemical> 3-veratroylveracevine. One of the components in the veratrine mixture of alkaloids. Found in the seed of schoenocaulon officinale and in rhizome of veratrum album l., liliaceae. Chemical name: Cevane-3,4,12,14,16,17,20-heptol, 4,9-epoxy-, 3-(3,4-dimethoxybenzoate), (3beta,4alpha,16beta)- (12 Dec 1998) |
| veratrina | <chemistry> Same as Veratrine. Source: Websters Dictionary (01 Mar 1998) |
| veratrine | <chemistry> A poisonous alkaloid obtained from the root hellebore (Veratrum) and from sabadilla seeds as a white crystalline powder, having an acrid, burning taste. It is sometimes used externally, as in ointments, in the local treatment of neuralgia and rheumatism. Synonym: veratria, and veratrina. Origin: Cf. F. Veratrine. See Veratrum. Source: Websters Dictionary (01 Mar 1998) |
| veratrol | <chemistry> A liquid hydrocarbon obtained by the decomposition of veratric acid, and constituting the dimethyl ether of pyrocatechin. Origin: Veratric + ol. Source: Websters Dictionary (01 Mar 1998) |
| veratrum | <botany> A genus of coarse liliaceous herbs having very poisonous qualities. Veratrum album of Europe, and Veratrum viride of America, are both called hellebore. They grow in wet land, have large, elliptical, plicate leaves in three vertical ranks, and bear panicles of greenish flowers. Origin: L. Veratrum hellebore. Source: Websters Dictionary (01 Mar 1998) |
| Veratrum album | The rhizome has emetic and cathartic actions. (05 Mar 2000) |
| veratrum alkaloids | <chemical> Alkaloids with powerful hypotensive effects isolated from american or european hellebore (veratrum viride ait. Liliaceae and veratrum album l. Liliaceae). They increase cholinergic and decrease adrenergic tone with appropriate side effects and at higher doses depress respiration and produce cardiac arrhythmias; only the ester alkaloids have been used as hypotensive agents in specific instances. They have been generally replaced by drugs with fewer adverse effects. Pharmacological action: antihypertensive agents. (12 Dec 1998) |