PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Vasovagal”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 recordsLinked to original sources
PubMed1977

Vasovagal hypotension and vasopressin release.

Mild vasovagal hypotension occurred in two normal male volunteers during insertion of indwelling venous cannulae. In spite of a rapid intravenous fluid load (3.6-4.6 litres in 90 min) both subjects passed little urine for 100 min. When the experiment was repeated without vasovagal hypotension, a rapid large diuresis followed the fluid load. The prolonged oliguria after vasovagal hypotension was the result of vasopressin release. This was demonstrated by measuring vasopressin in the blood and urine and by observing the renal response to a water load. The observation in man that a mild transient hypotensive episode may reduce urine flow for 100 min has clinical significance.

Catheterization↗
PubMed1978

Antecedent psychological factors in the onset of vasovagal syncope.

Broad psychosocial antecedents for 18 aviators with vasovagal syncope are compared with 31 controls. The immediate thoughts, fantasies, and feelings of the fainters are examined in detail. The fainters had significantly more job dissatisfaction than the controls. The presyncope fantasies of the fainters confirm Engel's observations of the immediate psychological context for vasovagal syncope (anticipation of bodily harm, denial of fear, and submission to a threat), and extend his formulation to include psychological harm in the form of humiliation, embarrassment, and loss of prestige.

Adult↗
PubMed1979

Vasovagal syncope in aircrew. Psychosocial aspects.

Twenty-four aircrew members with the diagnosis of vasovagal syncope were compared to 26 controls on variables of personality characteristics, psychosocial antecedents to the onset of their conditions, and hyperventilation experience. The syncope group was found to be younger, slightly less adaptable, and to have significantly more negative feelings about their work. The authors argue that syncope in aircrew should be considered from a psychosocial perspective as well as from a medical-neurological perspective.

Adaptation, Psychological↗
PubMed1976

"Vasovagal" syncope.

Explore the source record for details and available documents.

Cardiovascular System↗
PubMed1978

Psychologic stress, vasodepressor (vasovagal) syncope, and sudden death.

Giving up in the face of emotional arousal and psychologic uncertainty are conditions conducive both to vasodepressor syncope and sudden death. Under such circumstances there may be simultaneous activation of two emergency biologic regulatory systems, flight-fight and conservation-withdrawal. In the healthy person this may result in vasodepressor syncope, benign arrhythmias, or both. In the presence of factors lowering the threshold for conduction disturbances, dangerous arrhythmias and sudden death rather than, or as well as, vasodepressor syncope may result. Although active myocardial damage by itself may provide the necessary and sufficient conditions for lethal arrhythmias, psychic uncertainty must be considered an additional risk factor. The implications of this concept for patient care and prevention of sudden death are a challenge for future research.

Adult↗
PubMed1979

Syncope of obscure nature.

One hundred and eleven cases of syncope or loss of consciousness are analyzed. Most are of obscure nature while some illustrate features of syncope that deserve further scrutiny. The cases are divided into six groups: Resembling cardiac syncope (30 cases); vasovagal syncope (22 cases); features of both cardiac and vasovagal syncope (12 cases); orthostatic hypotensive (29 cases); akinetic seizure? (12 cases); and miscellaneous (5 cases). Some groups are subdivided according to the circumstances surrounding the spells, for example, seated eating, nocturnal, associated with bowel movement, response to anticonvulsant therapy, etc. The following conclusions seem warranted: The evidence favors the existence of a type of akinetic seizure resembling cardiac syncope; loss of consciousness while seated eating (prandial syncope) may comprise a syndrome; syncope related to bowel movement or abdominal pain is a striking association; sporadic nocturnal syncope due to temporary hyporeactivity of baroreceptors is not sufficiently recognized; alcohol ingestion may precipitate orthostatic hyporeactivity of baroreceptors is not sufficiently recognized; alcohol ingestion may precipitate orthostatic hypotension. Familial syncope, syncope proneness and cold drink syncope are illustrated.

Adult↗
PubMed1975

Spring clip tubal occlusion: a report of the first 400 cases.

Between September 1972 and March 1974, laparoscopic tubal sterilization was performed on 394 patients with the use of a spring-loaded plastic clip under local analgesia and on an outpatient basis. Intravenous fentanyl and infra-umbilical infiltration and tubal spray with 1% lidocaine were found to be very acceptable and effective forms of analgesia. The average time spent by a patient in the hospital was 4 hours, 26 minutes. There was no major immediate complications apart from vasovagal reactions in 34 patients. Up to June 30, 1974, six patients in the series had become pregnant, not as a failure of the clip per se, but as a result of improper application of the clips. This seems to be a safe, simple, and effective method of female sterilization with great potentials of reversibility.

Adult↗
PubMed1979

Carotid sinus syndrome: treatment by carotid sinus denervation.

Hypersensitive carotid sinus is a rare cause of spontaneous syncopal attacks. It must be differentiated from the other more common causes, such as intrinsic cardiac disease, vasovagal responses, postural hypotension and cerebrovascular insufficiency, although it may accompany these conditions. The definition of carotid sinus syncope is syncope elicited by stimulation of a hypersensitive carotid sinus. Nineteen patients with carotid sinus syncope were treated by carotid sinus denervation. Ages ranged from 48 to 83 with a mean of 65.5 years. Symptoms of marked dizziness or syncope were reproduced by gentle compression over the carotid bifurcation, while ECG monitoring revealed bradycardia or transient asystole. Seventeen patients had carotid arteriograms, eleven of which were normal. One patient had stenosis of the external carotid artery, while five had stenosis of the internal carotid. The right carotid sinus was involved in ten patients, the left in three and both sides in six. All patients underwent unilateral or bilateral carotid sinus denervation. Five patients with internal carotid stenosis had concomitant carotid endarterectomy. Complete relief of symptoms or marked improvement was noted in all but one patient. Postoperative follow-up ranged up to 15 years. Carotid sinus denervation is a simple, effective method of treating this disorder.

Aged↗
PubMed1975

Trephine bone biopsy by radiologists: results of 73 procedures.

Trephine bone biopsies were performed in 67 patients. Routine radiography, laminagraphy, and radioisotopic techniques were employed to determine areas of involvement and exact sites for biopsy. Sites were selected on the basis of accessibility, possible complications, and chances of recovering diagnostic material. The biopsy material was informative in 81% of patients. One controllable hemorrhage, one temporary sinus tract, a small pneumothorax requiring no therapy, and two benign vasovagal responses were the only complications. Widespread malignant disease and osteomyelitis, particularly disk-space infection, are the most suitable lesions for trephine biopsy.

Biopsy, Needle↗
PubMed1976

[Relation between training status and orthostatic tolerance].

Investigations on orthostatic tolerance and physical fitness prior to and after 6-8 h immersion experiments surprisingly revealed that all untrained subjects endured pre- and postimmersion tilt table tests without subjective complaints, whereas after immersion all trained participants collapsed within the first minutes of erect position displaying symptoms of a vasovagal syncope. Assuming that this impaired orthostatic tolerance of trained subjects can partially be referred to influences of an altered blood pressure control system we decided to record the blood pressure characteristics of both groups. Thereby, the transmural pressure of the carotid artery was changed by applying from outside either reduced or exceeding pressures. The controller sensitivity in the untrained group was almost twice as high as in the trained one. This implies a better regulatory response to disturbing interference in the untrained. Under normal conditions the controlling capacity of both groups is sufficient to cope with body position changes. However, during stress situations--in this case, reduction of aldosterone concentration as well as losses of plasma volume due to the 'Gauer-Henry-Reflex'--blood pressure regulation first fails in the trained subjects.

Blood Pressure↗
PubMed1978

A prospective cooperative study of complications following flexible fiberoptic bronchoscopy.

The frequency of complications following flexible fiber-optic bronchoscopic procedures was studied prospectively in 908 patients from 13 cooperating hospitals. Major complications (respiratory arrest, pneumonia, pneumothorax, and obstruction of airways) occurred in 1.7 per cent (15) of the procedures. There was one death, yielding a mortality of 0.1%. Minor complications, including vasovagal reactions, fever, cardiac arrhythmias, bleeding, obstruction of airways, nausea and vomiting, pneumothorax, psychotic reaction, and aphonia, occurred in 6.5% of the procedures. Pneumothorax occurred after 5% (four) of 85 transbronchial biopsies. Although serious complications occur more frequently than previously reported from retrospective studies, complications after fiberoptic bronchoscopic procedures are still quite infrequent. The relative risks and benefits must always be carefully weighed in patients being considered for a fiberoptic bronchoscopic procedure.

Adult↗
PubMed1977

Bromocriptine treatment in acromegaly: clinical and biochemical effects.

Eight selected patients with active acromegaly and elevated GH levels without other endocrine disturbances were submitted to long-term treatment and acute dose-response trials with bromocriptine. Seven patients showed clinical improvement and lowering of GH levels in response to long-term treatment, however, two of these showed only minor changes in GH levels during the acute dose-response trial. Glucose tolerance and heel pad thickness remained unchanged, while urinary hydroxyproline excretion and blood, plasma and erythrocyte volumes decreased. Using daily doses of 20 mg bromocriptine, side effects were generally minor. Severe vasovagal reactions were, however, observed in two patients, in one at the start of treatment, in the other after ingestion of 25 mg bromocriptine. Bromocriptine represents a valuable treatment alternative in acromegaly, but only long-term treatment will separate responders from nonresponders.

Acromegaly↗
PubMed1977

Orthostatic tests in 85 geriatric patients in in-patient long-term care.

Pathological orthostatic heart rate and systolic blood pressure responses are common in geriatric patients in long-term in-patient care. The distribution of these pathological types of response differs markedly from that of earlier investigated patients (2), with a higher prevalence of asympathicotonic and vasovagal responses and a lower prevalence of sympathicotonic responses in this material.

Aged↗