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Ruhparwar Arjang - - 2010
When sinus node or atrioventricular (AV) node cells are damaged by disease, the implantation of an artificial cardiac pacemaker becomes necessary. In search for a biological alternative, the objective of this study was to demonstrate whether in vivo adenoviral gene transfer of Adenylate-Cyclase type VI (AC-VI) can create biological pacemaker ...
van de Sandt F M - - 2010
A 62-year-old patient presented with dizzy spells after her dual chamber pacemaker (Medtronic Enrhythm P1501DR), implanted for complete AV block, had been reprogrammed to deliver antitachycardia therapy (ATP) for paroxysmal atrial tachycardia. Her symptoms were caused by inhibition of ventricular backup pacing during ATP, leading to ventricular asystoles. Inhibition was ...
Taha Nima - - 2010
Doppler echocardiography of mitral inflow or aortic outflow or both has been validated and advocated to guide biventricular (Biv) pacemaker optimization. A comprehensive and tailored Doppler echocardiographic evaluation may be required in patients with heart failure to assist with Biv pacemaker optimization. The third heart sound (S(3)), an acoustic cardiographic ...
Madershahian Navid - - 2010
In the presented case, a screw-in pacemaker lead migrated through the right ventricle, pericardium, left hemidiaphragm, and the left liver lobe into the epigastric region. The rarity of the case is based upon the multiorgan perforation without development of relevant pericardial effusion or intra-abdominal bleeding. Lead extraction was performed uneventfully.
Bondke Hansjuergen - - 2010
AIMS: In the normal heart, myocardial contractility is augmented at elevated heart rates. This effect is known as force-frequency relationship (FFR). The FFR is altered in failing hearts and may be used to detect myocardial function impairment. Force-frequency relationship measurements usually require invasive techniques and have therefore rarely been used ...
Stone Jason Lyle - - 2010
The hazard of undetected cardiac pacemakers exploding in crematoria is well described. This short report describes the use of an affordable hand-held metal detector to detect cardiac pacemakers. Over the course of a year, the metal detector located 100% of cardiac pacemakers in a district general hospital mortuary. A simple ...
Christoffels Vincent M - - 2010
Pacemaker and conduction system myocytes play crucial roles in initiating and regulating the contraction of the cardiac chambers. Genetic defects, acquired diseases, and aging cause dysfunction of the pacemaker and conduction tissues, emphasizing the clinical necessity to understand the molecular and cellular mechanisms of their development and homeostasis. Although all ...
Matsutani Hideyuki - - 2010
We proposed a new acquisition method of coronary MDCT achieved by pacing rate resetting and/or propranolol or verapamil injection in patients with a pacemaker. Coronary MDCT was undertaken in 57 patients with a pacemaker (DDD: 51, VVI: 6) and in 2975 patients with sinus rhythm as control using Aquilion 64 ...
Chemello D - - 2010
The R-on-T phenomenon is a well-known entity that predisposes to dangerous arrhythmias. Typically, a premature ventricular complex occurring at the critical time during the T wave of the preceding beat precipitates ventricular tachycardia and fibrillation. This phenomenon can occur not only in asynchronous ventricular pacemakers, but also in synchronous pacemakers, ...
Molina J Ernesto - - 2010
Patients undergoing tricuspid valve replacement who already have a transvenous pacemaker system in the right ventricle are often recommended to have the ventricular lead removed and an epicardial system implanted. However, as a rule, the reliability of endocardial transvenous pacemaker leads has been superior to epicardial systems. Therefore, if the ...
Kumor Magdalena - - 2010
The aim of this study was to evaluate the reliability of pacemaker diagnostic function in diagnosing ventricular arrhythmias. We compared the occurrence of ventricular ectopic beats in 51 simultaneous 24-hour electrocardiogram (ECG) recordings and pacemaker event counters printouts. The diagnostic function of a pacemaker allowed also for a qualitative assessment ...
Mitov Vladimir - - 2010
INTRODUCTION: Persistent left superior vena cava represents a congenital vascular defect of the venous system, which often makes standard 58 cm endocardial lead placement impossible. CASE OUTLINE: A right chamber approach by the left cephalic vein was tried. This was impossible because standard endocardial lead (SJM Isoflex 5 1646T, bipolar ...
Bigdeli Amir K - - 2010
Complications of pacemaker implantation include myocardial perforation, venous thrombosis, vegetations of the tricuspid valve or pacing lead, and tricuspid regurgitation. We report a patient presenting with a case of delayed ventricular lead perforation through the right ventricle. The lead was uneventfully extracted under transesophageal echocardiographic observation in the operating room ...
Sánchez-Quintana Damián D Departamento de Anatomía y Biología Celular, Universidad de Extremadura, Facultad de Medicina, Badajoz, - - 2010
The development of ablation techniques for supraventricular arrhythmias in patients with Ebstein's anomaly have led to a need for better understanding of the morphology of the triangle of Koch and the position of the atrioventricular (AV) node in this structure. The study involved 17 human hearts: 11 with Ebstein's anomaly ...
Liu Peng P Encephalopathy Center, First Affiliated Hospital of Wenzhou Medical College, 325000 Wenzhou, - - 2010
Stroke is the leading cause of death and long-term disability. This study was undertaken to investigate the factors influencing daily activities of patients with cerebral infarction so as to take interventional measures earlier to improve their daily activities. A total of 149 patients with first-episode cerebral infarction were recruited into ...
Kohnen R F - - 2009
An 83-year-old female patient with symptomatic atrial fibrillation was referred to the Department of Cardiology for a scheduled electrocardioversion. Because of a junctional escape rhythm after the electrocardioversion she received a DDD pacemaker which was complicated by dyspnoea and ST-segment elevations in the inferior and precordial leads. Because of suspicion ...
Klimczak Artur - - 2010
Development and advances in heart pacing over the last nearly half a century allowed to save numerous lives by providing pacing support in bradycardia and complete heart block. Nevertheless, long-term follow up of patients with implanted pacemaker showed unfavorable remodeling of the heart, both from hemodynamic as well as electrical ...
Subramanian Anandaraja - - 2010
The introduction of new pacing algorithms for preserving intrinsic atrioventricular conduction has made the interpretation of normal pacemaker function at times challenging. Electrocardiographic (ECG) findings in a patient with apparent pacemaker malfunction is presented and interpretation given. During this process, the managed ventricular pacing algorithm is described to interpret the ...
Massoure P L - - 2009
A 31-year-old man had undergone pacemaker implantation for complete atrio-ventricular block six years before. Permanent ventricular stimulation was seen on the ECG. The QRS complex was negative in leads I, VL and V2 to V5. The ventricular lead tip was found to be screwed into a branch of the great ...
Vaccarino Guillermo Nuncio - - 2009
The presence of large lead vegetations poses additional difficulties for explantation because many methods cannot be used due to the potential hazard of embolism. We report two patients with large vegetation on the ventricular lead due to endocarditis and one of them with an atrial septal defect associated. It was ...
N'guetta Roland - - 2011
Acute hyperkalemia may induce well-known serious cardiac arrhythmia. However, ventricular aberration including concealed conduction may also occur. We report the case of a 35-year-old woman who had a previous history of late-operated ventricular septal defect communication and DDD pacemaker was admitted for dyspnea. During hospitalization, an acute hyperkalemia induced sinoatrial ...
DAS Mithilesh K - - 2009
In recent years, the role of implantable pacing devices has expanded beyond the arrhythmia horizon and contemporary pacemakers' attempt to meet the physiological needs of patients. Modern pacemakers' functions include various modes of dual-chamber pacing, rate-response algorithms with dual sensors for optimum physiological response, cardiac resynchronization therapy (CRT), arrhythmia-prevention algorithms, ...
Chan Yau-Chi - - 2009
Normal heart rhythms originate in the sinoatrial node. HCN-encoded funny current (I(f)) and the Kir2-encoded inward rectifier (I(K1)) counteract each other by respectively oscillating and stabilizing the negative resting membrane potential, and controlling action potential firing. Therefore, I(K1) suppression and I(f) overexpression have been independently exploited to convert cardiomyocytes (CMs) ...
Novak Miroslav - - 2009
AIMS: To evaluate intracardiac findings near leads and causes of death in pacemaker/defibrillator patients. METHODS AND RESULTS: Special autopsy was performed on 78 patients deceased in a hospital. Age at death was 77.9 +/- 10.0, implantation-death interval 4.0 +/- 3.3 years, ventricular leads n = 78, and atrial leads n ...
Sun Pin - - 2009
BACKGROUND: We investigated the clinical value of Doppler echocardiography for determining the optimal setting of atrioventricular interval in patients with dual chamber pacemakers (DDD). In 38 patients with complete atrioventricular block and DDD pacemakers, the atrioventricular interval was prolonged in a stepwise fashion by 20 ms, from 90 to 250 ...
Bramanti Oreste - - 2009
A patient with arrhythmogenic right ventricular cardiomyopathy/dysplasia, implanted with a dual-chamber implantable cardioverter-defibrillator programmed in DDD mode, showed an unexpected ventricular sensing dysfunction: despite a very long (320 ms) programmed atrioventricular (AV) interval, ventricular stimuli were delivered in the ST segment after each spontaneous conducted QRS complex. This suggested the ...
Sanghvi Amish V - - 2009
Bradycardia and rarely cardiac arrest as a complication of cervical spine injury due to reduced sympathetic activity is well known, which usually settles down in 4-6 weeks of injury. There are few case reports in literature of high cervical spinal cord injury requiring permanent cardiac pacemaker due to this complication, ...
Frank Christopher M - - 2009
Managing arrhythmias is challenging in patients who have undergone heterotopic heart transplantation because of the superimposed rhythms of the native and donor hearts. We present the case of a 43-year-old man with a previously placed biventricular pacemaker who underwent heterotopic heart transplantation and later developed acute rejection of the donor ...
Loukopoulou Sofia N - - 2009
A male child, 18 months old, with interrupted aortic arch, ventricular septal defect, postoperative complete heart block and an epicardial DDD pacemaker since the age of nine months, was admitted to our department because of episodes of syncope. At first the episodes were considered as epilepsy and the child was ...
Manzoor Ali Syed - - 2009
Minor abrasions can occur while mobilising old lead during pacemaker generator replacement necesittating placement of additional lead adding to the financial burden and junk in heart. We describe a novel way of repair of old pacemaker lead preventing additional lead placement.
Trocinski Douglas R - - 2011
A 55-year-old African-American woman with a history of end-stage renal disease secondary to systemic lupus erythematosus, dual-chamber pacemaker placement secondary to sick sinus syndrome, and a previous subarachnoid hemorrhage presented via ambulance to our Emergency Department (ED) from an outside hospital with the report of altered mental status, hyperkalemia, and ...
Brueck Martin - - 2008
BACKGROUND AND PURPOSE: The cause of severe cardiac conduction disturbances or sinus node dysfunction is often unknown. The objective of this study was to assess the incidence of coronary artery disease (CAD) and the necessity of revascularization in patients with symptomatic bradycardia requiring permanent pacemaker implantation and to try to ...
Etsadashvili Kakhaber - - 2009
AIM: The long-term effects of high impedance vs. standard impedance pacing leads on actual generator longevity were studied. METHODS AND RESULTS: In 40 patients (21 females, age 73 +/- 13 years) with standard dual-chamber pacemaker indication, bipolar standard impedance ventricular leads and high-impedance leads were implanted in a randomized fashion. ...
C?ceres R - - 2009
In this case report we present a patient with temporal lobe epilepsy (TLE) showing partial complex seizures and secondary generalization, and treated with several antiepileptic drugs. After two consecutive seizures she had an episode of cardiac arrest followed by AV-block III which led to the implantation of a cardiac pacemaker. ...
Seki Hiroshi - - 2009
There have been several reports of a malpositioned pacemaker lead as a complication in pacemaker implantation. Herein we report a rare case of a malpositioned pacemaker lead in the left ventricle, which could occur in patients with cardiac structural abnormalities. A 70-year-old woman, who had undergone implantation of a pacemaker ...
Silva Flávio - - 2009
Failures in stability and COD removal performance often occurred in full-scale anaerobic reactors treating the evaporator condensate from a sulphite pulp mill due to substrate inhibition and occasional contaminations with red liquor (wood cooking liquor). With this work, the beneficial effect provided by the continuous addition of an external carbon ...
Steinhaus David - - 2008
A 1957 power blackout in Minnesota prompted C. Walton Lillehei, MD, a pioneer in open heart surgery, to ask Earl Bakken, the co-founder of Medtronic, Inc., to create a battery-operated pacemaker for pediatric patients. That conversation led to the development of the first external battery-operated pacemaker. That first bulky device ...
Smedema J P - - 2008
A 63-year-old man presented with recent-onset symptoms secondary to third-degree atrio-ventricular block, for which a dual-chamber pacemaker was inserted. Additional investigations resulted in the diagnosis of cardiac sarcoidosis. FDG-PET and MIBI-technetium SPECT were used as follow-up tools for monitoring active granulomatous myocardial infiltration.
Drago V - - 2009
BACKGROUND: Deep brain stimulation (DBS) is a treatment for patients with Parkinson's disease (PD) who are not adequately controlled with medications. An artist reported changes in her artistic creativity and art appreciation when treated with left DBS. We sought to study her artistic productions and her appreciation of art while ...
Achen Sarah E - - 2008
CASE DESCRIPTION: A 12-year-old Miniature Dachshund with a history of permanent endocardial pacemaker implantation performed 7 weeks previously was admitted for routine dental prophylaxis. CLINICAL FINDINGS: Preanesthetic ECG revealed normal ventricular capture. Thoracic radiographic findings included caudomedial displacement of the endocardial pacemaker lead. Echocardiography revealed moderate chronic degenerative valve disease ...
Nguyen T Ninh - - 2008
PURPOSE: The purpose of this study is to describe a novel technique for thoracoscopic construction of an intrathoracic esophagogastrostomy using a circular stapler. DESCRIPTION: Conventional method for construction of the esophagogastric anastomosis requires placement of the anvil through an esophageal stump and securing it with a pursestring suture. Advances in ...
Pan Xuejun - - 2008
Lodgepole pine (Pinus contorta) killed by mountain pine beetle (Dendroctonus ponderosae) (BLP) was compared with healthy lodgepole pine (HLP) for bioconversion to ethanol and high-value co-products. The BLP and HLP chips were pretreated using an ethanol organosolv process at a variety of severities. It was shown that the BLP was ...
Yamaoka Masaya - - 2008
A 69-year-old man with pacemaker was referred to our center for cerebral infarction. He had a high fever for 10 days during his hospitalization. Pacing failures deteriorating to asystole were observed responsible for bacterial vegetation around the tip of the pacemaker lead, which is rare but important for the cause ...
Antoniucci David - - 2008
BACKGROUND: Whatever the mechanism or mechanisms involved in the genesis of bradyarrhythmias during rheolytic thrombectomy (RT), the severity and duration of bradycardia are related to vessel location and the duration of the activation of the RT catheter. The latter implies that procedural variables may have a role in the prevention ...
Schiraldi Fernando - - 2008
Hyperkalemia may cause cardiac pacemaker (PMK) malfunctioning due to a reduction of the electronegativity of the resting myocardial potential. Both sensing and capture mechanisms could be temporarily affected, with possible life-threatening effects. Calcium chloride may counteract almost immediately such a dangerous effect of hyperkalemia, restoring the normal pacemaker function. We ...
Pereira de Sousa Lidiane Aparecida - - 2008
PURPOSE: The 6-minute walk test (6MWT) is a simple and reliable method routinely used in the evaluation of many conditions including cardiac diseases. However, it is rarely performed in patients with pacemakers (PMs), and the applicability and safety in this group is not established. The purpose of this study was ...
LaPage Martin J - - 2008
We report a fatal device-device interaction between a wearable automated defibrillator (WAD; LifeVest - LifeCor, Inc., Pittsburgh, PA, USA) and a unipolar pacemaker that occurred in an 18-year-old patient listed for cardiac transplantation due to his failing Fontan. The patient developed ventricular tachycardia that was initially detected by the WAD. ...
Vanhercke Daniel - - 2008
The inadvertent malposition of a pacemaker lead in the left ventricle is a rare and underdiagnosed pacemaker complication. A 78-year-old woman was admitted to our Emergency Department for progressive dyspnea, 8 years after transvenous pacemaker implantation. Routine 12-lead electrocardiography revealed a right bundle branch block on the paced beats, and ...
Greenlee Emily C - - 2008
Glaucoma after penetrating keratoplasty is a frequently observed post-operative complication and is a risk factor for graft failure. Penetrating keratoplasty performed for aphakic and pseudophakic bullous keratopathy and inflammatory conditions are more likely to cause postoperative glaucoma compared with keratoconus and Fuchs' endothelial dystrophy. The intraocular pressure elevation may occur ...
Ogawa Kenji - - 2008
We used functional MRI to investigate roles of left lateral premotor cortex in syntactic processing of complex sentences. Participants read left-branching (LB), center-embedded (CE), and active-conjoined (AC) sentences to determine noun-verb relationships. The main clause of CE sentences was interrupted by a relative clause, requiring noun-phrases to be maintained in ...
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