Search Results
Results 551 - 600 of 1219
< 7 8 9 10 11 12 13 14 15 16 17 >
Teo N - - 2002
AIMS: Pacemaker wires can result in stenosis of the superior vena cava and other central veins. The aim of this study is to demonstrate the safety and effectiveness of treating stenoses of the superior vena cava (SVC) and central veins with balloon venoplasty and metallic stent insertion in the presence ...
Mond Harry G - - 2002
A man with complete heart block received a Pacesetter Affinity pacemaker, programmed DDD. Two months later, the patient was beaten to death and the coroner requested telemetric information. Pacemaker stored Event Records for the previous 40 hours were retrieved and using the zoom scale, the events leading to death were ...
Altun Armagan - - 2002
This report describes a patient with a 6-year-old pacemaker lead in the left ventricle. Both transthoracic and transesophageal echocardiography unequivocally showed that the lead enters the left ventricle via the foramen ovale and the mitral valve. The patient did not suffer from a thromboembolic event; therefore, we did not proceed ...
Meijboom Willem B - - 2002
Persistent left superior vena cava is usually asymptomatic and does not cause any physiological problems (1). However it can severely complicate pacemaker implantation and render it sometimes impossible (2). In this case report we describe the implantation of a biventricular pacemaker using a left-sided approach in a patient with persistent ...
Vijayvergiya Rajesh - - 2002
Single-chamber atrial pacing is the most physiological and yet economical modality of treatment in patients with symptomatic sinus node disease with normal atrioventricular conduction. However, because of the possibility of future development of a high-degree atrioventricular block and atrial fibrillation, most patients are implanted either dual- or single-chamber right ventricular ...
Morgan D R - - 2002
The embryological development of the superior vena cava (SVC) is complex. If the left common cardinal vein fails to occlude it can, along with the left duct of Cuvier form a left SVC, which frequently drains into the coronary sinus. This may result in abnormalities in the anatomy of this ...
van Gelder Berry M - - 2002
After lead positioning during implantation of a biventricular pacing system intermittent ventricular simulation was observed. There was no pacemaker connected to any of the leads, but ventricular capture could be provoked by an intermittent contact between the lead stylet, which was still partially inserted, and a self-retaining retractor. The same ...
Fang Ching-Chang - - 2002
We report 2 patients with recurrent syncope and dizziness, later noted to have single coronary arteries. Both had right heart strain, one having pulmonary hypertension and the other having right ventricular outflow obstruction, which resulted in sinus node dysfunction. Patients were refractory to medical therapy and improved after pacemaker implantation.
Sivakumaran Soori - - 2002
Pericarditis has been noted as a potential complication of pacemaker implantation. This study evaluated the risk of developing pericarditis following pacemaker implantation with active-fixation atrial leads. Included were 1,021 consecutive patients (mean age 73.4+/-0.4 years, range 16-101 years; 45.2% women) undergoing new pacemaker system implantation between 1991 and 1999 who ...
Young Kevin R - - 2002
Sinus nodal dysfunction is common in the elderly and frequently requires a permanent cardiac pacemaker. Current pacemakers are extremely reliable but require ongoing monitoring to detect battery depletion and component or lead failure. This report describes a patient's manipulation of the pacemaker generator and proximal leads within the subcutaneous pocket ...
Simões K - - 2002
The morphological characteristics of the ventricular myocardium and of coronary vascularization were studied in three freshwater teleost species, Piaractus mesopotamicus, Colossoma macropomum and Clarias gariepinus (African catfish), by correlating their ventricular shapes and swimming habits. In Piaractus mesopotamicus and Colossoma macropomum, species with highly active swimming habits, the cardiac ventricle ...
Hansky B - - 2002
BACKGROUND: Because after tricuspid valve replacement (TVR) the transvenous implantation of endocardial leads is contraindicated, myocardial screw-in leads were used to ventricular pacing. Recently available coronary vein (CV) leads are stimulating the left ventricle epicardially and can be implanted transvenously, too. METHOD AND RESULTS: We implanted these leads in patients ...
Lipchenca Igor - - 2002
This report describes two patients who exhibited far-field oversensing of the P wave by the ventricular channel of a DDD biventricular pacemaker implanted for the treatment of congestive heart failure. Oversensing probably occurred secondary to slight displacement of the left ventricular lead in the coronary venous system. Long-term reliable pacing ...
Wiegand Uwe K H - - 2002
Intermittent atrial undersensing is observed in a considerable percentage of patients with single lead VDD pacemakers. Analyzing the 2-year data of the Saphir Multicenter Follow-Up Study, the authors investigated predictors for the occurrence of undersensing. The study included 194 patients with high degree AV block who received a VDD pacemaker ...
Ferasin L - - 2002
A four-and-a-half-year-old neutered male shorthair cat was presented with a three-week history of episodic fainting. Twenty-four hour electrocardiographic (Holter) recording revealed frequent prolonged episodes of complete atrioventricular (AV) block with ventricular standstill. The fainting episodes coincided with the longest periods of ventricular inactivity. A permanent transjugular pacemaker was placed to ...
Durham D - - 2002
OBJECTIVE: To review the diagnosis and management of cardiac arrhythmias in a two-part presentation. DATA SOURCES: Articles and published peer-review abstracts on tachycardias and bradycardias. SUMMARY OF REVIEW: Bradycardias are caused by a failure of the sinus node to generate normal impulses or due to a defect in cardiac conduction ...
Barold S Serge - - 2002
This report describes two cases of far-field sensing of the P wave by the ventricular channel of conventional DDD pacemakers programmed to a relatively high sensitivity to promote sensing of ventricular extrasystoles. Ventricular pacing was maintained in both cases when the ventricular channel was not inhibited. One case was caused ...
Padeletti Luigi - - 2002
Optimal management of atrial arrhythmias with dual chamber pacemakers requires proper performance of automatic mode switching (AMS). The aim of this study was to develop a reliable technique to test the AMS function by using an external electronic device capable of mimicking the occurrence of supraventricular arrhythmias (Supraventricular Arrhythmia Simulator ...
Hamada Hiroshi - - 2002
The generation of morphological, such as left-right, asymmetry during development is an integral part of the establishment of a body plan. Until recently, the molecular basis of left-right asymmetry was a mystery, but studies indicate that Nodal and the Lefty proteins, transforming growth factor-beta-related molecules, have a central role in ...
Jang Dong P - - 2002
As virtual reality technology continues to attract significant attention in clinical psychology, especially in the treatment of phobias, physiological monitoring is increasingly considered as an objective measurement tool for studying participants. There are few studies, however, of the normal physiological response to virtual environments or reactions to different virtual environments. ...
Ho Charles - - 2002
This article presents a discussion of some challenges in the design of a multi-function patient monitor. The term "multi-function patient monitor" refers to a single medical device that monitors multiple physiological parameters from the same patient. A common configuration of the monitor is a personal computer (PC) platform communicating with ...
Lineweaver Charles H - - 2002
We identify a subsample of the recently detected extrasolar planets that is minimally affected by the selection effects of the Doppler detection method. With a simple analysis we quantify trends in the surface density of this subsample in the period-Msin(i) plane. A modest extrapolation of these trends puts Jupiter in ...
Uejima Tokuhisa - - 2002
A 76-year-old woman with a dual chamber pacemaker underwent coronary intervention of the right coronary artery for unstable angina. After the procedure, she had recurrent chest pain, and after the repeat angiography showed reduced coronary flow in the distal vessel, she underwent emergent coronary artery bypass grafting. During this course ...
Nakamoto Susumu - - 2002
PURPOSE: Cardiac leads that became infected, fail, or are otherwise problematic present difficulties in the management of patients. In this report, we assess our intravascular countertraction technique. METHOD: Between February 1990 and January 2001, 13 leads were removed from 11 patients using the intravascular countertraction technique. The reasons for lead ...
Elias E - - 2002
Two species, Heligmoptera giraudouxi n. sp. and H. querei n. sp., are described. These are co-parasites of the small intestine of Myospalax fontanierii in China (Gansu). H. giraudouxi is closely related to the only existing species of the genus, H. myospalaxi (Nadtochiy, 1970), a parasite of Myospalax psilurus in the ...
Hines G - - 2001
Methods of objectively assessing the growth rate of hairs in hirsute women have generally required some form of shaving and have focused on studying hairs affecting the face, which has reduced the number of patients willing or able to participate in such studies. A possible solution is to assess the ...
Dufort C G - - 2001
Changes in the heart rates of lobsters (Homarus americanus) were used as an indicator that the animals were capable of sensing a reduction in the salinity of the ambient seawater. The typical response to a gradual (1 to 2 ppt/min) reduction in salinity consisted of a rapid increase in heart ...
Van Gelder B M - - 2001
A 63-year-old man with chronic atrial fibrillation and heart failure had a biventricular pacing system implanted. The pulse generator was a standard DDDR pacemaker, using the atrial channel for the right ventricular lead and the ventricular channel for the left ventricular lead. During final adjustment of the pacing parameters, a ...
Barold S S - - 2001
This report describes the development of an unusual pacemaker tachycardia in a patient with a conventional dual chamber pacemaker used for biventricular pacing in the VVIR mode. The atrial channel was connected to the left ventricle and the ventricular channel to the right ventricle. The tachycardia was sustained by sensing ...
Arroyo Espliguero R - - 2001
This article presents a case of displacement of the ventricular electrode of a DDD pacemaker occurring 3 years after implantation following a session of respiratory therapy. The incident provoked the loss of the ventricular pacing and left pectoral stimulation. The different techniques for achieving airway patency that can be used ...
Toda N - - 2001
Doppler index is the sum of isovolumetric contraction time and isovolumetric relaxation time divided by ejection time and has clinical value as an index of combined systolic and diastolic myocardial performance. This crossover study compared the Doppler index and atrial natriuretic hormone (atrial natriuretic peptide) [ANP] between optimal (AV) delay ...
Beaufort-Krol G C - - 2001
At the age of 4 years, a total cavopulmonary connection was performed in a boy with a complex congenital heart defect. On addition, a DDDR pacemaker was implanted for sick sinus syndrome. Atrial and ventricular leads were epicardially placed at the left atrium and left ventricle. At the age of ...
Arnar D O - - 2001
BACKGROUND: Transvenous pacemaker catheters may be placed unintentionally into the left ventricle. This can lead to thromboembolic complications. METHODS AND RESULTS: We report two cases where pacemaker catheters placed unintentionally in the left ventricle via a patent foramen ovale resulted in cerebrovascular accidents. The malpositioned pacemaker catheters were demonstrated by ...
Forterre S - - 2001
A 13-year-old male neutered domestic shorthaired cat had repeated syncopal episodes over a 6 month period, which had variable duration and continued to increase in frequency. Intermittent ventricular asystole, due to complete heart block, and hyperthyroidism were documented. As the syncopal episodes did not respond to a 4-week medical treatment ...
Vanholder R - - 2001
The uremic syndrome is a complex mixture of organ dysfunctions, which is attributed to the retention of a myriad of compounds that under normal condition are excreted by the healthy kidneys (uremic toxins). In the area of identification and characterization of uremic toxins and in the knowledge of their pathophysiologic ...
Schwaitzberg S D - - 2001
Trocar insertion during laparoscopic preperitoneal hernia repair (TEP) can be troublesome because the space into which the trocars are inserted is smaller than that available for transabdominal approaches. Insertion of the trocars directly into the balloon used to dissect the preperitoneal space can facilitate this process. The insertion of a ...
Searleman A - - 2001
Left-handers often have had to contend with pressure to switch their preferred writing hand and shift attempt reports are common, especially among older adult left-handers. Three groups of left-handers can be defined by combining two variables, writing hand side and the report of a rightward hand preference shift attempt. The ...
Salzer W - - 2001
PURPOSE: Intrathecal methotrexate (MTX) achieves high concentrations in the cerebrospinal fluid (CSF) following intralumbar administration. However, peak ventricular CSF MTX concentrations are highly variable and are < 10% of those achieved with intraventricular dosing. The objectives of this study were to evaluate the effect of intralumbar and intravenous probenecid on ...
Pachón J C - - 2001
The QRS widening by ventricular conventional pacing impairs the systolic and diastolic functions and increases mitral regurgitation. The aim of this study was to compare conventional pacing to an alternative stimulation mode with a narrower QRS using two leads in the RV. Thirty-nine (25 men, 14 women; mean age 60.1 ...
O'Cochlain B - - 2001
Pacemaker dependent patients exhibit interventricular conduction delay due to right ventricular lead placement. The addition of a transvenous coronary sinus lead for biventricular pacing has been shown to be effective. Venous stenosis and thrombosis postpacemaker implantation can occur in up to 35% of patients. This report describes a patient with ...
Seeck M - - 2001
This report describes a patient with complex partial seizures arising from the right temporal lobe who developed symptomatic sinus arrest following the end of his seizure activity. A ventricular pacemaker was implanted and was documented to function appropriately, preventing development of bradycardia associated symptoms during subsequent seizures. Possibly relevant cerebral ...
Plummer C J - - 2001
AIMS: To compare pacemaker telemetry with simultaneous Holter recordings in the diagnosis of atrial fibrillation and to evaluate the STOP-AF study telemetry criteria for the presence of atrial fibrillation. METHODS AND RESULTS: 18 consecutive patients enrolled in the STOP-AF study had simultaneous 24 h Holter recordings and down-loaded pacemaker telemetry. ...
Yang J - - 2001
OBJECTIVES: To assess the preliminary clinical results of implantation of dual chamber pacemaker defibrillator and to evaluate the safety and effectiveness of placement of endocardial leads in the axillary vein. METHODS: Seven patients with ventricular tachycardia and/or ventricular fibrillation (VT/VF), associated with bradyanhythmia received implantation of a dual chamber pacemaker ...
Heath M - - 2001
The model of apraxia proposed by Roy (1996) states that three patterns of apraxia should be observed across pantomime and imitation conditions. In the present analysis the frequency and severity of each pattern of apraxia were examined in a consecutive sample of left-(LHD) and right-hemisphere-damaged (RHD) patients during the production ...
Nayak A K - - 2001
BACKGROUND: Minute ventilation responsive rate adaptive pacemaker improves exercise performance in the patients with chronotropic insufficiency. The usual complications of these pacemakers are related to pacemaker implantation, rather than to the rate adaptive function. CASE REPORT: We report a patient with mitral stenosis and atrial fibrillation with a VVIR pacemaker, ...
Tang J B - - 2001
Immediate active mobilization of repaired tendons is thought to be the most effective way to restore function of injured flexor tendons. Sixty human flexor digitorum profundus tendons were used to evaluate techniques for active tendon motion. The tendons were divided equally into six groups, and each group was assigned to ...
Harrigan R A - - 2001
Atrioventricular (AV) dissociation is an electrocardiographic syndrome; a descriptive term for a variety of conditions of abnormal cardiac conduction which all feature independent function of the atria and ventricles. AV dissociation can be subclassified as AV dissociation by default (an independent ventricular pacemaker responds to slowing of the dominant atrial ...
Arthur W - - 2001
A patient with congestive heart failure and an ICD had undergone atrioventricular nodal ablation and optimization of heart failure medical therapy. Intracardiac T wave sensing by the ICD drew attention to the new development of asymptomatic hyperkalemia. Surface ECG features of hyperkalemia were not readily identified due to pacemaker dependence.
Yu H Y - - 2001
BACKGROUND: Human oscillator is observed in and outside the nervous system. Cardiac rhythm is generated by heart itself but can be modulated by brain. Using the technique of transcranial magnetic stimulation (TMS) and resetting index, we studied if single-pulse TMS could reset the cardiac rhythm and help differentiate oscillator of ...
Lai C L - - 2001
A 23-year-old woman with craniofacial hyperhidrosis underwent bilateral thoracoscopic T2-sympathectomy. Marked sinus bradycardia with a mean heart rate of 49 beats/min by Holter ECG monitoring occurred after the procedure and persisted for > 2 years. Normal sinus node function was found by an invasive electrophysiological study and unopposed vagotonia after ...
< 7 8 9 10 11 12 13 14 15 16 17 >