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bradycardia/nicotina
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Apnea and bradycardia due to anaphylaxis to tobacco glycoprotein in the infant rabbit.
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Prenatal and postnatal exposure to cigarette smoke is associated with an increased incidence of the sudden infant death syndrome, although the cause(s) for this is unknown. Tobacco glycoprotein (TGP), a group of proteins purified from cured tobacco leaves and present in cigarette smoke, have been
Symptomatic bradycardia due to nicotine intoxication.
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Nicotine is a dangerous substance extracted from tobacco leaves. When nicotine is absorbed in excessive amounts, it can lead to respiratory failure and cardiac arrest. The commercialization of electronic cigarettes (e-cigarettes) has allowed users to directly handle e-cigarette liquid. Consequently,
Acute hypotension and bradycardia following ocular exposure to liquid nicotine.
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Green tobacco sickness (bradycardia in a young farmer).
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Carotid sinus versus carotid body origin of nicotine and cyanide bradycardia in the dog.
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In-utero exposure to nicotine alters the development of the rabbit cardiac conduction system and provides a potential mechanism for sudden infant death syndrome.
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In-utero exposure to tobacco smoke remains the highest risk factor for sudden infant death syndrome (SIDS). To alleviate the risks, nicotine replacement therapies are often prescribed to women who wish to quit smoking during their pregnancy. Cardiac arrhythmias is considered the final outcome
The estrogen-dependent baroreflex dysfunction caused by nicotine in female rats is mediated via NOS/HO inhibition: Role of sGC/PI3K/MAPKERK.
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We have previously reported that estrogen (E2) exacerbates the depressant effect of chronic nicotine on arterial baroreceptor activity in female rats. Here, we tested the hypothesis that this nicotine effect is modulated by nitric oxide synthase (NOS) and/or heme oxygenase (HO) and their downstream
Effect of high doses of nicotine in pigs. I. Changes of the electrocardiogram.
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Pigs in which venous catheters were positioned for long-term use were injected i.v. with high doses of nicotine in physiol. saline. The LD50 was 2.656 mg/kg body weight. Clinical symptoms were mainly: forced respiration, muscular tremor to tetanoid spasms, cyanosis of the skin, salivation and
Hypoxia recruits a respiratory-related excitatory pathway to brainstem premotor cardiac vagal neurons in animals exposed to prenatal nicotine.
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The most ubiquitous form of arrhythmia is respiratory sinus arrhythmia in which the heart beat slows during expiration and heart rate increases during inspiration. Whereas respiratory sinus arrhythmia benefits pulmonary gas exchange respiratory dysfunction presents a major challenge to the
Increased afferent vagal responses produced by epicardial application of nicotine on the canine posterior left ventricle.
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Vagally mediated vasodepressor reflexes are observed in dogs and patients with acute myocardial ischemia or infarction and may be related to the Bezold-Jarisch reflex. To test whether nicotine and bradykinin produced site-specific vagal vasodepressor and sympathetic vasopressor responses,
Prenatal nicotine exposure recruits an excitatory pathway to brainstem parasympathetic cardioinhibitory neurons during hypoxia/hypercapnia in the rat: implications for sudden infant death syndrome.
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Maternal cigarette smoking and prenatal nicotine exposure increase the risk for sudden infant death syndrome (SIDS) by 2- to 4-fold, yet despite adverse publicity, nearly one of four pregnant women smoke tobacco. Infants who succumb to SIDS typically experience a severe bradycardia that precedes or
Effect of systemic nicotine on mucus secretion from tracheal submucosal glands and on cardiovascular, pulmonary, and hematologic variables.
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To investigate effects of systemic nicotine on mucus secretion from tracheal submucosal glands we anesthetized 13 ferrets (5 male, 8 female; average weight 1138 +/- 469 g, mean +/- SD) with pentobarbital (initial dose, 62 +/- 26, total dose, 90 +/- 26 mg/kg), cannulated the jugular vein for i.v.
Differential control of central cardiorespiratory interactions by hypercapnia and the effect of prenatal nicotine.
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Hypercapnia evokes a strong cardiorespiratory response including gasping and a pronounced bradycardia; however, the mechanism responsible for these survival responses initiated in the brainstem is unknown. To examine the effects of hypercapnia on the central cardiorespiratory network, we used an in
Identification and evaluation of the contribution of the chemoreflex in the hemodynamic response to intracarotid administration of contrast materials in the conscious dog: comparison with the response to nicotine.
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Intracarotid administration of ionic contrast material and nicotine in conscious, unsedated dogs caused similar biphasic reflex responses consisting of initial decreases followed by increases in heart rate and pressures. Both phases were characterized by increases in respiratory amplitude. The
Febuxostat attenuates vascular calcification induced by vitamin D3 plus nicotine in rats
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This study was undertaken to investigate the possible ameliorative influences of febuxostat (FEB) on vitamin D3 plus nicotine (VDN)-induced vascular calcification (VC) in Wistar rats. VDN rats received a single dose of vitamin D3 (300.000 IU/kg, I.M) and two oral doses of nicotine (25 mg/kg) on day
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