Abstract:
UNLABELLED:Cardiac function management devices, including implantable pacemakers and implantable defibrillators, include at least 1 cardiac lead having an electrode for making contact with a portion of the heart. It has been previously shown that the braided multifilament wire electrodes have a high failure rate both for sensing of spontaneous heart activity and for safe heart stimulation. Therefore, it is desirable to have cardiac leads made of materials with mechanical and electrical properties to insure safe pacemaker function. We have developed a new fiber material suitable for implantable cardiac leads with superior high modulus, high mechanical strength, and excellent electrical conductivity. METHODS:The material comprises poly(p-phenylene benzobisoxazole) fibers plated with gold by using an electroless plating method. Due to the difficulty in plating gold directly on organic and inorganic fibers, gold plating was carried out on the surface of silver-plated fibers. RESULTS:The morphology of plated fibers was studied by x-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy, and electrochemical polarization measurements. It was found that gold was uniformly plated on the poly(p-phenylene benzobisoxazole) fiber, and the gold-plated fibers have good corrosion resistance. The electrical conductivity of the gold-plated fibers was higher than 4 x 104 S/cm, and its tensile strengths and Young moduli were greater than 1.9 and 130 GPa, respectively, when estimated in terms of a single-fiber strand. CONCLUSIONS:The metal-clad polymer fibers have advantages over conventional metal cardiac leads in flexibility, weight savings, mechanical strength, durability, and tailored electrical conductivity. Therefore, the combined engineering properties of the new fiber afford implantable cardiac lead applications at reduced diameter while having higher strength. Furthermore, the new fiber can be terminated just like a regular metal wire with the choice of ultrasonic bonding, crimping, or band connection.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Lobodzinski SS,Laks Mdoi
10.1016/j.jelectrocard.2009.07.019subject
Has Abstractpub_date
2009-11-01 00:00:00pages
566-73issue
6eissn
0022-0736issn
1532-8430pii
S0022-0736(09)00336-7journal_volume
42pub_type
杂志文章abstract::A 58-year-old woman with a history of multi-origin atrial tachycardia and limb-girdle muscular dystrophy was treated for presyncope caused by pauses in atrial rhythm. A dual-chamber pacemaker was implanted. The low-voltage area extended broadly, but 10-V pacing could not capture the large right atrium, including the r...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.05.003
更新日期:2020-01-01 00:00:00
abstract::Exercise testing was evaluated in 51 patients with critical left coronary artery disease (LCA) documented by coronary arteriography within two weeks of their bicycle ergometer (26 patients) or treadmill (25 patients) electrocardiographic study. Adequate tests, as defined by the patient having reached 85% of predicted ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(79)80057-6
更新日期:1979-07-01 00:00:00
abstract:AIM:P-wave dispersion (PD), and duration has been reported to be associated with inhomogeneous and discontinuous propagation of sinus impulses. The aim of this study was to investigate the PD in patients with coronary slow flow (CSF) phenomenon. METHODS:Study population included 48 patients with angiographically prove...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.06.004
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Correct positioning of peripherally inserted central catheters (PICCs) is essential to avoid complications. We evaluated intravenous electrocardiogram (ECG) recordings during PICC placement to assess the effectiveness of this guidance technique to reduce complications resulting from incorrect catheter placem...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.02.003
更新日期:2010-05-01 00:00:00
abstract:BACKGROUND:Cardiac magnetic resonance (CMR) is currently considered the reference standard for in vivo assessment of myocardial infarction (MI). There is, however, no international consensus on how MI quantification from CMR should be performed. The aim of this study was to test how previously published manual quantifi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2011.06.007
更新日期:2011-09-01 00:00:00
abstract::Frank vectorcardiograms (VCGs) were collected on magnetic tape for 666 normal newborn infants at 1, 6, 12, 24, 36, 48, 60, and 72 hours after birth and analyzed by computers. The final total included 1,337 VCGs for white babies and 413 for blacks. No previous report has been made for the normal neonate with such a lar...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(77)80027-7
更新日期:1977-01-01 00:00:00
abstract:BACKGROUND:Differentiation of wide complex tachycardias (WCTs) into ventricular tachycardia (VT) or supraventricular wide complex tachycardia (SWCT) using conventional manually-operated electrocardiogram (ECG) interpretation methods is difficult. Recent research has shown that accurate WCT differentiation may be accomp...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.05.004
更新日期:2020-01-01 00:00:00
abstract::The ECG phenomena in 20 outpatients (121 episodes) suffering from variant angina with transient ST segment elevation greater than 1.5 mm. (Prinzmetal angina) were studied by Holter monitoring. The most important changes in the ECG morphology were: a) increased height of the R wave in all cases, b) the S wave decreased...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(85)80051-0
更新日期:1985-07-01 00:00:00
abstract:BACKGROUND:Sudden arousal has been associated with sudden cardiac death in individuals with ischemic heart disease, cardiac arrhythmias, and the congenital long QT syndrome. This study aimed to determine the effects of arousal on ventricular repolarization in normal individuals by examining the dynamic QT interval-hear...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.jelectrocard.2005.10.006
更新日期:2006-07-01 00:00:00
abstract::This article shows the use of the equivalent surface source model in its application to the genesis of the surface ECG in which the sources are of the double layer type. This model has previously been shown to yield an accurate description of body surface potentials during the QRS interval. Its application to the gene...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1054/jelc.2001.28896
更新日期:2001-01-01 00:00:00
abstract::We describe a 75-year-old male patient with two-vessel coronary artery disease, who developed transient left posterior hemiblock (LPH) while undergoing an exercise treadmill test (ETT). The intraventricular conduction abnormality initially had the features of alternating LPH, which evolved to stable LPH prior to dissi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/s0022-0736(99)90022-5
更新日期:1999-01-01 00:00:00
abstract::Serial electrocardiograms (ECGs) of 49 patients receiving adriamycin were analyzed for the development of persistent changes. The ECG changes were compared with those of a control group of 20 patients receiving other chemotherapeutic drugs, which were comparable to the additional chemotherapy received by the adriamyci...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(78)80122-8
更新日期:1978-07-01 00:00:00
abstract::The electrocardiogram (ECG) is a relatively insensitive tool for the detection of right ventricular hypertrophy (RVH), but some criteria have high specificity. The recommended ECG screening criteria for RVH are not sufficiently sensitive or specific for screening for mild RVH in adults without clinical cardiovascular ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2017.09.004
更新日期:2018-01-01 00:00:00
abstract::Although solid angle analysis has been considered to be reasonable for explaining the distribution of ST segment deviation following ischemia, it has not been tested fully, especially for ST segment changes in various sites at different lead surfaces. Thus, we investigated the applicability of solid angle theory to th...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(86)80033-4
更新日期:1986-07-01 00:00:00
abstract:BACKGROUND:Conflicting results have been reported on the predictive value of the electrocardiographic left ventricular hypertrophy (LVH) in the general population. This meta-analysis sought to compare the predictive value of different electrocardiographic criteria of LVH in the general population. METHODS:We comprehen...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2020.07.001
更新日期:2020-01-01 00:00:00
abstract::The myocardial electrical conduction is significantly influenced by the sympathetic and parasympathetic nervous systems. Hypervagotonia refers to increased vagal tone leading to sinus bradycardia, sinus pause, or any degree of atrioventricular (AV) block. There are many clinical, electrocardiographic, and electrophysi...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2009.07.018
更新日期:2009-11-01 00:00:00
abstract::Eight sets of electrocardiographic (ECG) criteria for the localization of accessory conduction pathway (ACP) were evaluated on 182 patients with a single ACP. The Rosenbaum criteria identified 78.6% of the left-sided and 94.0% of the right-sided ACPs. Four of the other seven sets of criteria demonstrated a sensitivity...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(92)90005-k
更新日期:1992-07-01 00:00:00
abstract::An 85-year-old male was implanted with a single-chamber permanent pacemaker because of atrial fibrillation with slow ventricular response. The patient had a chronic hearing impairment and decided to buy a hearing aid device. The MyLink device (MyLink, Phonak, Stafa, Switzerland) is a multifrequency FM transmitter/rece...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2008.01.008
更新日期:2008-09-01 00:00:00
abstract::The electrocardiographic criteria for isolated left anterior fascicular block are reviewed and illustrated. Left anterior fascicular block decreases the voltage in the chest leads and increases the voltage in the limb leads. The usual voltage criteria of left ventricular hypertrophy must be modified appropriately. Cha...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(83)80024-7
更新日期:1983-04-01 00:00:00
abstract:BACKGROUND:The use of vectorcardiography (VCG) has regained interest, however, original Frank-VCG equipment is rare. This study compares the measured VCGs with those synthesized from the 12-lead electrocardiogram (ECG) in patients with heart failure and conduction abnormalities, who are candidate for cardiac resynchron...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.04.001
更新日期:2015-07-01 00:00:00
abstract::We present a case of an anterior ST-segment elevation acute coronary syndrome secondary to occlusion of a non-dominant right coronary artery. Usually, an anterior ST-segment elevation corresponds to a left anterior descending artery occlusion; however, in rare cases it can be secondary to a non-dominant right coronary...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2018.07.017
更新日期:2018-01-01 00:00:00
abstract::We report a case of an outpatient cardiac arrest due to ventricular fibrillation and resuscitated with external automated defibrillator shocks in which acute amiodarone infusion unmasked a Brugada phenotype electrocardiographic pattern. Possible interferences by this drug and suitable therapeutic actions are discussed...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2012.02.005
更新日期:2012-07-01 00:00:00
abstract::Cardiac hemangioma is a rare primary cardiac tumor. We reported the case of patient with left ventricular hemangioma who was referred to our hospital complaining of palpitation for one week. 24 h Holter revealed high episode of ventricular arrhythmia. Echocardiography showed a mass at left ventricle, which was also co...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2017.04.014
更新日期:2017-01-01 00:00:00
abstract:BACKGROUND:Temporary-permanent pacemakers [TPPM] are externally placed permanent generators attached to active fixation transvenous leads. TPPM can be used as an alternative to standard temporary pacing leads when placement of a permanent pacemaker is contraindicated. We sought to determine the incidence and risk facto...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2016.05.004
更新日期:2016-07-01 00:00:00
abstract:OBJECTIVE:The purpose of this study is to investigate the effect of cardiac resynchronization therapy (CRT) on P wave maximum duration (PWM) and P wave dispersion (PWD) in patients with advanced heart failure. METHODS:Forty-six patients (33 men; mean age, 60 +/- 11 years) with CRT were enrolled in the present study. P...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.jelectrocard.2009.02.005
更新日期:2009-07-01 00:00:00
abstract:BACKGROUND:Measuring repolarization characteristics is challenging and has been reserved for experienced physicians. In electrocardiographic imaging (ECGI), activation-recovery interval (ARI) is used as a measure of local cardiac repolarization duration. We hypothesized that repolarization characteristics, such as loca...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2020.02.003
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Electrocution injury (EI) is a major problem in developing countries. The aim of this study is to investigate the effect of EI on electrocardiographic (ECG) parameters. METHODS:A total of 43 patients hospitalized with diagnosis of EI were prospectively enrolled. Admission ECGs were compared with follow-up E...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2015.06.009
更新日期:2015-09-01 00:00:00
abstract::Atrioventricular node reentry tachycardia is an incompletely understood substrate for supraventricular tachycardia. Although there is agreement that the mechanism involves functionally separate fast and slow AV node pathways, which are somewhat anatomically discrete, the anatomical basis for the reentrant circuit is n...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2008.06.016
更新日期:2008-11-01 00:00:00
abstract::Hidden Markov modelling (HMM) is a powerful stochastic modelling technique that has been successfully applied to automatic speech recognition problems. We are currently investigating the application of HMM to electrocardiographic signal analysis with the goal of improving ambulatory ECG analysis. The HMM approach spec...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(90)90099-n
更新日期:1990-01-01 00:00:00
abstract::Previous studies indicate that the predictive value of atrial fibrillatory rate in patients undergoing cardioversion of atrial fibrillation (AF) of long duration is limited. The present study investigates signal entropy in this setting. Standard 12-lead electrocardiograms (ECGs) were recorded from 66 consecutive patie...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.10.033
更新日期:2011-03-01 00:00:00