hypotension/هیوسین

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[Use of transdermal scopolamine in the prevention of neuro-cardiogenic syncope induced by the tilt test].

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OBJECTIVE The underlying mechanism of syncope induced by head-up tilt test is still incompletely understood. It has been proposed a sudden increase in parasympathetic's activity induced by the excessive activation of the cardiac mechanoreceptors. The aim of our study was to evaluate the clinical,

Unique Scopolamine Withdrawal Syndrome After Standard Transdermal Use.

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We report the case of a 62-year-old woman who developed a withdrawal syndrome after using a standard 1.5-mg transdermal scopolamine (TDS) patch behind the ear to prevent motion sickness during sailing. The patient, who had used TDS occasionally for years without significant adverse effects, more

Cerebrovascular dysautoregulation syndrome complex--brain hypoperfusion precedes hypotension and cardiac asystole.

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A 43-year-old male with history of recurrent episodes of syncope, non-sustained wide complex tachycardia and structurally normal heart was studied. Syncope was induced with upright tilt provocation, while monitoring cerebral blood flow velocity with Doppler ultrasound, concurrently with invasive

Structure-activity requirements for hypotension and alpha-adrenergic receptor blockade by analogues of atropine.

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The hypotensive action of various antimuscarinic compounds structurally related to atropine was studied in conscious, unanesthetized rats. The alpha-adrenolytic activity of these agents was assessed both in vivo (blockade of norepinephrine-induced pressor response) and in vitro (displacement of

Hyoscine-N-butyl-bromide-induced hypotension and myocardial ischemia.

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Hyoscine N-butyl bromide, also known as scopolamine, is a type of antimuscarinic agent. This drug is associated with numerous common side effects, including abdominal fullness, constipation, urinary retention, blurred vision, skin flushing, tachycardia, decreased sweating, and salivation. The most

[Syncope - a systematic overview of classification, pathogenesis, diagnosis and management].

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Syncope is defined as a temporary interruption of cerebral perfusion with a sudden and transient loss of consciousness and spontaneous recovery. Approximately one third of the population experiences syncope at least once during a lifetime. Presyncopal signs and symptoms, including weakness,

Utility of upright tilt-table testing in the evaluation and management of syncope of unknown origin.

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OBJECTIVE Vasovagally mediated hypotension and bradycardia are believed to be common, but difficult to diagnose, causes of syncope. Upright tilt-table testing has been proposed as a possible way to test for vasovagal episodes. This study investigated the clinical utility of this technique in the

Head-upright tilt-table testing: a useful tool in the evaluation and management of recurrent vertigo of unknown origin associated with near-syncope or syncope.

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Recurrent idiopathic vertigo associated with near-syncope and syncope is a common perplexing problem, some cases of which are considered autonomically mediated (vasovagal). Upright-tilt-table testing has emerged as a potential method to test for vasovagal episodes. This study evaluated the use of

Usefulness of head-up tilt test in evaluating patients with syncope of unknown origin and negative electrophysiologic study.

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The vasovagal nature of syncope, which remained unexplained despite full clinical and electrophysiologic investigation, was evaluated by means of 60 degrees head-up tilt test for 60 minutes. Thirty patients (17 men and 13 women, mean age 65 years, 19 with and 11 without organic heart disease) with 1

[Vasovagal syncope].

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The nature of most syncopal episodes, previously unknown, was recently elucidated by new diagnostic techniques such as the use of the tilt test. The vasovagal syncope can be clinically diagnosed by means of the tilt test. The transitory loss of consciousness during prolonged orthostasis is typically

Drug interactions with sufentanil. Hemodynamic effects of premedication and muscle relaxants.

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Induction of anesthesia with synthetic opioids is occasionally accompanied by undesirable hemodynamic changes such as tachycardia and hypertension, or bradycardia and hypotension. We hypothesized that drug interactions cause many of these adverse responses. Therefore, we conducted a randomized

[Anesthetic management of a multiallergic patient scheduled for cholecystectomy].

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A 64-year-old woman was scheduled for cholecystectomy. Her past history revealed that serious anaphylactic reactions including generalized flushing and urticaria, severe hypotension and unconsciousness which occurred after eating crab four years ago. Puncture and/or intradermal skin test and

Hemodynamic responses to pancuronium and vecuronium during high-dose fentanyl anesthesia for coronary artery bypass grafting.

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The hemodynamic and electrocardiographic (ECG) effects of pancuronium and vecuronium were compared during high-dose fentanyl anesthesia for coronary artery bypass grafting (CABG) surgery. Forty-eight morphine-scopolamine premedicated patients scheduled for elective CABG were anesthetized with

[Syncope of undetermined nature after electrophysiologic study. Usefulness of the head-up tilt test in the diagnosis of vaso-vagal origin and in the choice of treatment].

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The vaso-vagal nature of syncopes which remained unexplained despite full clinical and electrophysiological investigation was evaluated by means of 60 degrees head-up tilt test for 60 minutes. Thirty patients (16 men and 14 women, mean age 63.6 years, 19 with and 11 without organic heart disease)

Centrally active antimuscarinic analogs of oxotremorine selectively block physostigmine-induced hypertension, but not peripheral muscarinic vasodepression.

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Some tertiary antimuscarinic amines related to oxotremorine were compared with atropine and scopolamine for their ability to block physostigmine-induced hypertension and acetylcholine-induced hypotension in rats. These cardiovascular responses are mediated via muscarinic receptors in the brainstem

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