Search Results
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Tellini L - - 1996
This study attempts to improve cardiac pacing by utilizing a new strategy based on integrative rather than substitutive stimulation. This type of cardiac stimulation does not compete with the sinoatrial oscillator and can position the stimulated beat at the expected time. This can be achieved by locking the pacemaker's escape ...
Wilke A - - 1996
The widespread use of cellular phones in the last years has prompted some recent studies to suggest an interference of pacemaker function by cellular phone usage. To determine the risk of pacemaker patients using D-net cellular phones, we tested 50 patients with permanent pacemakers after routine pacemaker check by short ...
Sparks P B - - 1996
In vitro tests suggest that rate adaptive pacemakers using changes in transthoracic impedance to vary pacing rate may be affected by digital mobile telephones. Electromagnetic fields generated by digital mobile telephones (Global System for Mobile [GSM]) represent a potential source of electromagnetic interference (EMI) for the Telectronics META rate adaptive ...
Shen W K - - 1996
BACKGROUND: The number of very elderly persons who are candidates for implantation of a permanent pacemaker is increasing, but the effect of cardiac pacing on long-term survival and functional variables has not been determined. OBJECTIVE: To determine long-term survival after implantation of a permanent pacemaker in octogenarians and nonagenarians and ...
Møller M - - 1996
The Danish Pacemaker Register was established in January 1982, and the 11 implanting centers in Denmark report to the Register on a continuous basis by use of the European Pacemaker Patient Identification Card proposed by the European Working Group on Cardiac Pacing. As of May 1994, the Register contained data ...
Jin Y T - - 1996
Previous studies indicated that Taiwan betel quid is a promoter rather than an initiator during the carcinogenesis of hamster buccal pouch carcinoma. The maximum promoting activity can be demonstrated 24 weeks after betel quid implantation, following an initial application of 0.5% DMBA (7,12-dimethyl benzanthracene) three times per week for 4 ...
Alt E - - 1996
Ventricular arrhythmias during a pacemaker follow-up have been previously reported, usually in conjunction with temporary asynchronous stimulation of a demand pacemaker through magnet application or by increased myocardial excitability, for example, following a myocardial infarction. The subject of this report, an 82-year-old pacemaker patient, had been VVI-paced without problems for ...
Aggarwal A - - 1996
Arrhythmias and pacemaker malfunction are known to occur from the use of an electrosurgical device. The present case report describes a patient with sick sinus syndrome who experienced ventricular fibrillation while undergoing surgery. During replacement of his non-functioning cardiac pacemaker under general anesthesia, electrosurgery was used to ensure hemostasis. Electric ...
Lau C - - 1996
OBJECTIVE: A prospective evaluation of patients with AV block using a single pass lead, VDD pacing system. DESIGN: Fifteen patients with AV block, eight males, seven females, average age 68.1 years (range 22.3 to 86.5) were implanted with the THERA VDD 8948 pacemaker and 5032 single pass steroid eluting lead ...
Ferris C F - - 1996
Golden hamsters start displaying flank marking behavior (a form of scent marking) around postnatal day 20 (P-20). Because the behavior is dependent upon the central activity of arginine vasopressin (AVP), the present study was conducted to correlate this activation with changes in the vasopressinergic system. A first set of experiments ...
Güldal M - - 1996
This article describes a patient who underwent right ventricular disconnection for medically refractory ventricular tachycardia associated with arrhythmogenic right ventricular dysplasia. After the operation there was no ventricular tachycardia recurrence. Two years after the operation, he received a permanent VVI pacemaker for the symptomatic second-degree AV block. Sensing function of ...
Raghavan C - - 1996
Transvenous pacemaker lead malposition in the left ventricle occurs rarely and requires a high index of suspicion for proper diagnosis. The case of a woman with unintentional lead placement in the left ventricle is presented. She had two episodes of transient neurologic deficits, possible secondary to embolic events, and was ...
Oriowo M A - - 1996
The stimulation by BRL 37344 of lipolysis in rat adipose tissues, and of relaxation of the rat distal colon, is mediated by the beta-3 adrenoceptor. The stereochemical requirements of the beta-3 adrenoceptor are poorly understood. The activities of the four stereoisomers of BRL 37344 (i.e., two pairs of diastereoisomers) on ...
Sala A - - 1996
Morphological and functional modifications occurring in Langendorff rabbit heart preparations perfused with purified human leukocytes (PMNL), as an organ model of sulfidopeptide-leukotrienes (sLT) transcellular biosynthesis, were studied. Coronary perfusion pressure (CPP), monitored as an index of coronary vasospasm, increased by 295% after challenge with the Ca(2+)-ionophore A-23187 (0.5 micromol/L) for ...
Miller G L - - 1996
This is the first reported case of cardiac tamponade presumed to be caused by postpericardiotomy syndrome (PPS) following endocardial pacemaker placement. An 84-year-old woman developed fever and dyspnea 3 weeks after pacemaker placement. Physical examination revealed hypotension, tachycardia, and pulsus paradoxus. Auscultation revealed clear lungs and diminished heart sounds. The ...
Doherty J G - - 1996
A seventy year old woman had a permanent VVI pacemaker inserted in 1983 for complete heart block and presented ten years later with purulent discharge from the generator pocket. During a prolonged pyrexial illness, she developed renal and respiratory failure and her illness was complicated by recurrent ventricular fibrillation. The ...
Haffajee C - - 1996
As implantable cardioverter defibrillators (ICDs) are strictly contraindicated in the presence of unipolar pacemakers, currently available options in patients having such chronic pacing systems include: abandoning the implanted pacemaker and selecting an ICD with ventricular demand (VVI) pacing; or replacing the chronic (dual chamber) unipolar pacing system with a dedicated ...
Chalana V - - 1996
Tracing of left-ventricular epicardial and endocardial borders on echocardiographic sequences is essential for quantification of cardiac function. The authors designed a method based on an extension of active contour models to detect both epicardial and endocardial borders on short-axis cardiac sequences spanning the entire cardiac cycle. They validated the results ...
Seo K - - 1996
Indirect inhibition of an external temporary pacemaker by electrocautery is reported. Before induction of general anesthesia for a hemimaxillectomy and radical neck dissection, a temporary transvenous demand pacemaker was inserted into a patient with a first-degree atrioventricular block and complete left bundle-branch block. Although we provided common precautions to prevent ...
Vanderheyden M - - 1996
The search for a pacemaker that accurately and easily mimics normal physiology is a continuing effort. Present pacing developments include AV synchrony and rate adaptiveness. The usefulness and clinical value of some of the new pacing systems remain unclear. Although the hemodynamic advantages of rate responsive pacing over classical ventricular ...
Shay S S - - 1996
OBJECTIVE: To examine the influence of three postures (upright and left and right recumbent) on gastroesophageal reflux event (RE) frequency and composition and a possible mechanism for the observations. METHODS: A) Forty fasting patients with (E+, n = 20) and without (E-, n =20) esophagitis were studied. Simultaneous manometry and ...
Kolker A R - - 1996
OBJECTIVE: The comparative safety of central venous puncture versus cutdown technique for access to the right heart. EXPERIMENTAL DESIGN: A retrospective review of five hundred and fifty-five single and dual chamber permanent pacemaker implants performed between January of 1987 and December of 1993. SETTING: Review was performed at St. Vincent's ...
Henderson D - - 1995
A 79-year-old patient with a permanent DDD pacemaker due to a complete AV block and severe bradycardia was seen with complaints of syncope. A surface ECG rhythm strip verified the loss of ventricular output with 6-second periods of asystole. Subsequent investigation using the pacemaker's annotated event markers and multiple polarity ...
Namura M - - 1995
A 50-year-old woman was transported to a hospital complaining of marked general malaise and epigastralgia with diarrhea and vomiting. Her electrocardiogram showed sinus arrest with a duration of nearly 8 sec. Atrial pacing with an external pacemaker improved her symptoms promptly. Following transfer to our hospital 3 days later, bradyarrhythmia ...
Kalman J M - - 1995
BACKGROUND: The sinus P wave arises from a pacemaker complex distributed along the crista terminalis. We investigated the feasibility of modification of sinus pacemaker function using graded applications of radiofrequency energy along the crista terminalis in dogs to achieve sinus rate control. METHODS AND RESULTS: Modification of sinus pacemaker function ...
O'Mahony D - - 1995
Carotid sinus hypersensitivity (CSH) is recognised in up to 45% of elderly patients with syncope, falls, and dizziness that may not be attributed to specific myocardial sinus node dysfunction, various diseases that affect pacemaker activity, cardiac output and blood supply to the brain. The pathophysiology of CSH is unclear but ...
Tylki-SzymaƄska A - - 1995
Three boys with mucopolysaccharidosis type III A (Sanfilippo) entered puberty at the ages of 5.9, 6.6 and 9.6 years. The diagnosis of central precocious puberty (GnRH-dependent) was established on the basis of pubertal levels of basal and GnRH-stimulated gonadotropins, LH and FSH. All the patients were tall from early infancy, ...
Monsieurs K G - - 1995
Many emergency medical service (EMS) systems are currently implementing semi-automatic external defibrillation (AED) by emergency medical technicians. Surprisingly little information is available on the possible interactions between AEDs and implanted cardiac pacemakers. Therefore, at present there are no clear guidelines for the use of AEDs on patients having a cardiac ...
Barbaro V - - 1995
A series of in vivo trials were carried out in order to verify whether the electromagnetic field radiated by GSM (Groupe Systemes Mobiles) mobile cellular phones might affect implanted pacemakers. Two European GSM phones of 2-watt power were tested and trials conducted on 101 pacemaker implanted outpatients attending day hospital ...
Als C - - 1995
Annual occurrences of immunogenic (IH) and non-immunogenic hyperthyroidism (NIH) between Berne (1976, 1982, 1991) and Szczecin (1973, 1980, 1991) were compared. Out of 21,025 patients referred for thyroid examinations, 10.1% (average) were hyperthyroid. In Berne (former endemic goiter region) and Szczecin (without goiter endemicity) IH occurred in 41% and 68%, ...
Baller M R - - 1995
Pacemakers and the underlying pathophysiologies leading to their implantation present challenges to the anesthetist. This case report discusses the anesthetic management of a patient with an implanted pacemaker. A case is presented of an 80-year-old female who was found unresponsive in a parking lot. She was diagnosed with a right ...
Carlisle D M - - 1995
OBJECTIVE: We explore the contribution of income and ethnicity to geographic variation in utilization of surgical procedures. DATA SOURCES/STUDY SETTING: We assessed the use of eight procedures from 1986 through 1988 among residents of Los Angeles County using data from the California Discharge Dataset, the 1980 census, and other secondary ...
Rakovec P - - 1995
Shifts in sinus node pacemaker complex may occur spontaneously, but occurrence of clinically relevant shifts is very rare. In this report, three patients (2 are siblings) with a history of palpitations and nearly permanent shifts in sinus node pacemaker complex are presented. Often, but not always, the pacemaker shifts followed ...
Perrin F M - - 1995
The effect of diethylstilboestrol on gonad development in quail embryos has been quantitatively analysed. Quail embryos at 4 days of incubation were treated with diethylstilboestrol (DES), using the egg dipping method. At 10 days of incubation, embryos were removed and killed by decapitation. Tissues were prepared for chromosome analysis, and ...
Tang C - - 1995
To assess the potential value of multi-shot EPI relative to segmented k-space SPGR for myocardial tagging, we measured tag contrast for both sequences in a phantom and human study and compared it with theoretical predictions. In the human heart, EPI tag contrast was three times that of SPGR at the ...
Vicenzi M N - - 1995
BACKGROUND: Management of patients with sinus node dysfunction must consider the stability of subsidiary pacemakers during anesthesia and treatment with antimuscarinic or sympathomimetic drugs. Baroreflex regulation of atrial pacemaker function is known to contribute to the interactions between inhalation anesthetics and catecholamines. Sinoatrial (SA) node excision can be a model ...
Vallar G - - 1995
The effects of transcutaneous electrical stimulation on left visuo-spatial hemineglect, assessed by a visuo-motor exploratory task (letter cancellation), were investigated in patients with right hemisphere lesions. In Experiment 1 left neck stimulation temporarily improved the deficit in 13 out of 14 patients (93%), while stimulation of the right neck had ...
Mohan P - - 1995
The endocardial endothelium (EE) modulates the performance of the subjacent myocardium and plays an important role in regulation of cardiac function. This modulation has been confirmed in a number of different species and in both in vitro and in vivo conditions. The mechanisms of EE modulation of myocardial performance are ...
Perry G Y - - 1995
Two cases of transient pacemaker failure to sense and capture during angiography are reported. This phenomenon is due to a transient increase in sensing and pacing thresholds beyond the pacemakers programmed settings. The underlying mechanism may be related to blood displacement, the electrochemical properties of the injectate, the high concentration ...
Bartlett C M - - 1995
Adult females of Strongyloides robustus Chandler, 1942, a parasite of sciurids in North America, were found in the duodenal mucosa of 30 of 32 red squirrels (Tamiasciurus hudsonicus (Erxleben)) collected in Cape Breton Island, Nova Scotia, Canada. The parasitic female is illustrated and redescribed; characteristics include: body 3.8-8.0 mm long, ...
Benditt D G - - 1994
PURPOSE: To review the status of artificial sensors in cardiac pacemakers and the rationale for developing pacing systems that use multiple sensors. DATA SOURCES: Journal articles published between 1982 and 1993 indexed in MEDLINE using the keywords pacemakers, sensors, and rate-adaptive, as well as abstracts and articles in the authors' ...
Babuty D - - 1994
The increasing number of heart transplant patients requires that physicians be able to recognize the electrocardiographic (ECG) and electrophysiologic properties of cardiac allografts. Cardiac allografts are characterized by modifications of resting ECGs and frequent arrhythmias in the postoperative period, and the loss of autonomic nervous control illustrated by permanent tachycardia ...
Smith C W - - 1994
PURPOSE: To develop improved methods of extracting pacemaker electrodes from the femoral vein by using standard equipment and techniques. MATERIALS AND METHODS: Pacemaker electrodes were removed from 61 patients aged 21-91 years (mean, 68 years). In 25 patients (41%), traction was applied to locking stylets to remove electrodes at the ...
Mallon E - - 1994
Three possible mechanisms of the hair shaft abnormality in cheveux incoiffables have been investigated in nine patients. Cheveux incoiffables hairs were found to exhibit a normal distribution of cystine-rich protein within both the cuticle and the cortex, as determined by silver methenamine ultrastructural cytochemistry. Resistance to stretching, at 65% relative ...
Deyo J A - - 1994
Monocrotaline (MCT) is a pyrrolizidine alkaloid which has been shown to induce immunotoxicity in mice. We hypothesized that metabolic activation of MCT by mixed-function oxygenases (MFO) to dehydromonocrotaline (MCTP) is a prerequisite for its immunotoxicity, as has been shown for other toxic effects of MCT. To test this hypothesis, we ...
Cazeau S - - 1994
The extension of random access memory now makes it possible to store electrocardiographic (ECG) information, referred to here as Holter function (HF), in the memories of new pacemakers, which can be used as diagnostic tools during long-term follow-up. This report describes our experience in 26 consecutive patients for whom the ...
Frielingsdorf J - - 1994
The effect of atrial contraction on cardiac function is reviewed in patients with dual chamber and rate-responsive ventricular pacemakers. The question posed was is there any haemodynamic, clinical or prognostic advantage of AV synchrony in dual chamber pacemakers in comparison to rate-responsive ventricular pacemakers? Optimal AV delay in dual chamber ...
Sharifi M - - 1994
Three patients with inadvertently positioned left heart pacemaker leads were admitted for neurological symptoms consistent with embolic stroke. In one of them, the pacemaker lead crossed the interatrial septum, the mitral valve, and entered the left ventricle. In another it was erroneously placed through the subclavian artery, across the aortic ...
Anderson S H - - 1994
The effect of macromolecules from oviductal conditioned medium (CM) on sperm motility and capacitation was studied. Sperm pooled from three bulls was incubated in either luteal isthmic CM, luteal ampullary CM, estrual isthmic CM, estrual ampullary CM, or control medium (no CM) for 4 h. Sperm capacitation and motility were ...
Ingram J M - - 1994
The computer modem technology being developed by Datascope Corporation for the purpose of off-site intra-aortic balloon pump (IABP) monitoring was clinically evaluated in 30 patients requiring IABP support. The Datascope System 95 model IABP with built-in modem was used on all patients. Remote communications via a personal computer with modem ...
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