Abstract:
BACKGROUND:Electrogram fractionation can result when multiple groups of cardiac cells are excited asynchronously within the recording region of a mapping electrode. The spatial resolution of an electrode thus plays an important role in mapping complex rhythms. METHODS:We used a computational model, validated against experimental measurements in vitro, to determine how spatial resolution is affected by electrode diameter, electrode length, interelectrode distance (in the case of bipolar recordings), and height of the electrode above a dipole current source. RESULTS:We found that increases in all these quantities caused progressive degradation in two independent measures of spatial resolution, with the strongest effect being due to changes in height above the tissue. CONCLUSION:Our calculations suggest that if electrodes could be constructed to have negligible dimensions compared with those in use today, we would increase resolution by about one order of magnitude at most.
journal_name
Coron Artery Disjournal_title
Coronary artery diseaseauthors
Stinnett-Donnelly JM,Thompson N,Habel N,Petrov-Kondratov V,Correa de Sa DD,Bates JH,Spector PSdoi
10.1097/MCA.0b013e3283507a9bsubject
Has Abstractpub_date
2012-03-01 00:00:00pages
126-32issue
2eissn
0954-6928issn
1473-5830journal_volume
23pub_type
杂志文章abstract:BACKGROUND:Although coronary artery bypass graft surgery (CABG) has been proven to have mortality and morbidity benefits in patients with non-ST elevation myocardial infarction and multivessel disease, the appropriate timing of this procedure remains unclear. Therefore, we proposed a propensity score-matched analysis c...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000537
更新日期:2017-12-01 00:00:00
abstract::Cardiac hypertrophy is a physiological adaptive response by the heart to pressure overload. However, after prolonged periods, this initial adaptive response becomes maladaptive, leading to increased mortality and morbidity from heart failure. Recently, 3-hydroxyl-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibit...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/01.mca.0000130229.18685.b9
更新日期:2004-08-01 00:00:00
abstract:BACKGROUND:Heart rate variability (HRV) time and frequency domain indices are strong predictors of malignant arrhythmias and sudden cardiac death. The effect of various angiotensin-converting enzyme (ACE) inhibitors on HRV in patients with acute myocardial infarction (AMI) has not been studied. METHODS:Ninety patients...
journal_title:Coronary artery disease
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1997-08-01 00:00:00
abstract:BACKGROUND:Platelet-activating factor is a biologically potent phospholipid that may mediate cell damage in patients with myocardial ischemia. In plasma, its inactivation to lyso-platelet-activating factor is catalyzed by a specific, lipoprotein-associated acetylhydrolase. Because lipoprotein levels decrease after myoc...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-199302000-00009
更新日期:1993-02-01 00:00:00
abstract::During myocardial ischemia, cardiomyocytes can undergo apoptosis or compensatory hypertrophy. Fas expression is upregulated in the myocardial ischemia and is coupled to both apoptosis and hypertrophy of cardiomyocytes. The role of Fas in apoptosis induction or cardiomyocyte hypertrophy during ischemic conditions is, h...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/MCA.0b013e3283093707
更新日期:2008-11-01 00:00:00
abstract:OBJECTIVE:Vessel bifurcations are prone to atherosclerotic plaque accumulation. Using volumetric intravascular ultrasound analysis, we investigated atheroma distribution at human coronary bifurcations in vivo. METHODS:We analyzed plaque distribution in 49 left anterior descending coronary artery-diagonal and 20 left c...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/01.mca.0000076511.29238.f1
更新日期:2003-06-01 00:00:00
abstract:OBJECTIVE:Erectile dysfunction and coronary artery disease share similar risk factors. Although phosphodiesterase-5 inhibitors used to treat erectile dysfunction do not adversely affect hemodynamic parameters in patients with coronary artery disease, their effects on myocardial blood flow are unknown. METHODS:In a ran...
journal_title:Coronary artery disease
pub_type: 杂志文章,随机对照试验
doi:10.1097/00019501-200609000-00001
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND:Anemia is associated with an increased risk of mortality in patients who underwent percutaneous coronary intervention (PCI) in the bare-metal stent era. However, there have been no data concerning the clinical importance of anemia improvement during the follow-up period after discharge from the hospital duri...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e3283564869
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:P-selectin, an adhesion molecule of the selectin family, is expressed on the surface of activated thrombocytes by thrombin. The aim of the present study was to assess the predictive value of P-selectin (estimated by flow cytometric assay) for acute cardiac events in acute coronary syndrome. METHODS:The stud...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-199508000-00009
更新日期:1995-08-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to examine coronary plaque morphology after initiation of statins and compare changes in plaque morphology in patients presenting with acute coronary syndrome (ACS) versus stable angina pectoris (SAP). BACKGROUND:ACS is associated with a pan-inflammatory state, and intraplaque feat...
journal_title:Coronary artery disease
pub_type: 杂志文章,随机对照试验
doi:10.1097/MCA.0000000000000415
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:In-stent restenosis has become a significant clinical problem as use of stents has increased. The optimal strategy for dealing with in-stent restenosis needs to be evaluated. OBJECTIVE:To compare the acute and late results of interventions for in-stent restenosis according to the device used, and to analyze...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200009000-00002
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVE:In-stent restenosis (ISR) and lesion progression are major obstacles for a percutaneous coronary intervention (PCI). Although previous studies have suggested that inflammation and lipid profile may be involved in those pathophysiological events, it remains controversial to date. The aim of the present study w...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e3283519f44
更新日期:2012-05-01 00:00:00
abstract::Endothelial dysfunction not only precedes the development of significant coronary artery stenosis, it has also been identified as a general phenomenon predicting future cardiovascular events in patients who are at risk. As regular physical activity as a part of a multifactorial intervention has been shown to affect sy...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/00019501-200605000-00003
更新日期:2006-05-01 00:00:00
abstract:OBJECTIVE:Ga-NOTA-RGD PET is a newly developed molecular imaging for angiogenesis. In this study, Ga-NOTA-RGD PET was used to investigate imaging characteristics in a rat myocardial infarction (MI) model and to monitor the efficacy of an angiogenesis induction therapy. MATERIALS AND METHODS:Ga-NOTA-RGD PET was perform...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e3283608c32
更新日期:2013-06-01 00:00:00
abstract:BACKGROUND:Coronary artery ectasia is defined as localized or diffuse dilation of the coronary arteries exceeding the 1.5-fold of normal adjacent segment. Scarce data are available about the role of inflammation in coronary artery ectasia. In the present study, we aimed to evaluate the expression of CD11b and CD45 adhe...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e32801104d4
更新日期:2007-02-01 00:00:00
abstract:OBJECTIVE:Electrocardiographic indices like maximum P-wave duration (P(max)) and P-wave dispersion (PD) can be used to detect patients with atrial conduction disorders, myocardial ischemia and those at risk for atrial fibrillation. Considering the diurnal variation of ischemia in patients with significant coronary lesi...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/01.mca.0000236284.64059.be
更新日期:2006-12-01 00:00:00
abstract:OBJECTIVE:Early evaluation of patients with chest pain is important not only for the detection of acute myocardial infarction (AMI) but also for identification of patients at high risk for future cardiac events. A multimarker strategy applying results of early measurements of different biochemical markers of cardiac ne...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200508000-00009
更新日期:2005-08-01 00:00:00
abstract::The phenomenon of myocardial stunning has been observed in all animal species studied. The possible occurrence of myocardial stunning in man has been demonstrated after either regional ischemia (such as exercise-induced angina, vasospastic or unstable angina) or after global ischemia (i.e., after cardioplegic arrest d...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/00019501-200108000-00004
更新日期:2001-08-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to clarify clinical and angiographical characteristics of acetylcholine (ACh)-induced spasm in the right and left coronary artery. METHODS AND RESULTS:We performed 557 consecutive procedures of spasm provocation tests of ACh from January 1991 to December 2000 in patients withou...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200206000-00005
更新日期:2002-06-01 00:00:00
abstract:AIM:The purpose of this study was a head-to-head comparison of tomographic imaging (SPECT) with technetium-99m (Tc-99m)-sestamibi and thallium-201 (Tl-201) using dipyridamole-low-level bicycle exercise stress for the assessment of coronary artery disease. METHODS:We studied 38 consecutive patients referred for the eva...
journal_title:Coronary artery disease
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1994-09-01 00:00:00
abstract:BACKGROUND:An association between early repolarization and ventricular fibrillation has recently been reported in patients with vasospastic angina (VSA). However, no studies have clarified whether the presence of early repolarization can predict VSA. METHODS:Participants comprised 286 patients (136 males) with clinica...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000983
更新日期:2020-11-13 00:00:00
abstract::The patient population with the need for oral anticoagulation to reduce stroke risk associated with atrial fibrillation (AF) and dual antiplatelet therapy to prevent stent thrombosis and myocardial infarction after percutaneous coronary intervention is increasing. However, patients treated with a triple therapy consis...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/MCA.0000000000000549
更新日期:2017-12-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to describe the procedural characteristics, myocardial perfusion, and long-term outcomes in ST-elevation myocardial infarction patients with an ectatic infarct-related artery (IRA). PATIENTS AND METHODS:The retrospective analysis included 1270 consecutive ST-elevation myocardial inf...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000720
更新日期:2019-06-01 00:00:00
abstract:OBJECTIVES:Few epidemiological studies have examined differences in the prevalence of risk factors and comorbidities in patients with systolic heart failure (HF), as compared with those with diastolic HF. METHODS:We analyzed data from 1426 residents of the Worcester (MA) metropolitan area hospitalized at all 11 greate...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e328334eb46
更新日期:2010-05-01 00:00:00
abstract:OBJECTIVES:Although drug-coated balloons (DCBs) are established for de-novo lesions in small coronary arteries, the impact of DCB treatment according to the reference vessel diameter (RVD) remains poorly defined. This study aimed to evaluate the angiographic and long-term clinical outcomes of DCB treatment for de-novo ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000001006
更新日期:2021-01-18 00:00:00
abstract:INTRODUCTION:We investigated the relationship between heart rate variability and preclinical carotid intima-media thickening, a putative index of atherosclerosis. METHODS:A sample of 350 men and women (mean age 56.8 years) selected for the presence or absence of untreated hypertension was assessed for heart rate varia...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e328011ac01
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND:Previous studies have suggested an increased risk of myocardial infarction associated with physical exercise. Activated neutrophils may contribute to the triggering mechanisms. METHODS:Fifteen patients with stable angina pectoris underwent symptom-limited bicycle ergometry. In neutrophils obtained from seri...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:
更新日期:1995-07-01 00:00:00
abstract:BACKGROUND:The effects of initial tests on long-term events have been unknown. PATIENTS AND METHODS:In this observational retrospective study, we analyzed the effects of initial noninvasive tests by myocardial perfusion imaging (MPI) and computed tomography angiography (CTA) on long-term major adverse cardiac events (...
journal_title:Coronary artery disease
pub_type: 杂志文章,多中心研究
doi:10.1097/MCA.0000000000000645
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND:Restenosis after coronary angioplasty is considered to be caused mainly by increased migration and proliferation of smooth muscle cells (SMC). The concept of local, site-specific delivery of pharmacologic therapies has opened the door for new, high-dose drug regimes. METHODS AND RESULTS:SMC were isolated by...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-199703000-00011
更新日期:1997-03-01 00:00:00
abstract:BACKGROUND:This study was designed to evaluate whether differences between sexes exist in serum-lipoprotein (a) [Lp(a)] and arterial-wall-apolipoprotein (a) [Apo(a)] levels in patients with advanced coronary artery disease. METHODS:The concentrations of Lp(a) in serum and Apo(a) in aortic biopsies were studied in 76 m...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-199504000-00013
更新日期:1995-04-01 00:00:00