Abstract:
BACKGROUND:The high-frequency contribution (i.e. 60-120 Hz) within the QRS complex of the surface ECG is supposed to be related to the arrhythmogenic substrate underlying sustained ventricular tachycardia in patients with coronary artery disease. One of the factors that prevents a wider clinical application of spectral analysis based on the fast Fourier transform is the considerable intra-individual variability of its results. This study presents a novel alternative approach of frequency-domain analysis, aimed at minimizing this methodological drawback. METHODS:The proposed method uses gliding-window fast Fourier transform analysis of the signal-averaged ECG to provide values expressing the area ratio for two predefined frequency ranges (60-120 Hz divided by 0-120 Hz). The term gliding window is derived from the methodological principle by which the window analyzed is moved from the onset of the QRS complex into the ST segment. Values of area ratios obtained for every time instant of the interval of gliding are the basis for construction of curves. These are further analyzed in order to find patterns that characterize abnormal ventricular activation, with special emphasis on the identification of arrhythmogenic correlates. RESULTS:In a group of 30 healthy subjects, the distribution of area ratio peaks was characterized according to their value and timing. The distribution of area ratio peaks in 43 patients with myocardial infarction differed substantially from the normal distribution in the control group. The amplitude of the peaks and their timing was not related to the occurrence of late ventricular potentials. CONCLUSION:The method of gliding-window fast Fourier transform analysis eliminates the variability of results obtained by traditional spectral analysis of the ECG signal. A higher number and a different distribution of high-frequency peaks during the QRS complex in postmyocardial infarction patients reflect abnormal ventricular activation. However, late ventricular potentials are not related to a higher proportion of high frequencies in the corresponding time interval within the terminal QRS complex.
journal_name
Coron Artery Disjournal_title
Coronary artery diseaseauthors
Slavkovský P,Hulín Idoi
10.1097/00019501-199403000-00011subject
Has Abstractpub_date
1994-03-01 00:00:00pages
249-56issue
3eissn
0954-6928issn
1473-5830journal_volume
5pub_type
杂志文章abstract:OBJECTIVE:To investigate the changes of inflammatory factors and hemostatic variable in plasma after a high-fat meal in normocholesterolemic patients with essential hypertension. METHODS:A total of 60 hypertensive patients were randomly assigned to accept a single high-fat meal (group 1, n=40) or not (group 2, n=20) i...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e3282f487f3
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND:Circulating leukocytes are recruited at atherosclerotic sites through a family of adhesion molecules. Circulating forms of adhesion molecules in peripheral blood can be quantified now. OBJECTIVE:To evaluate the relationship between circulating adhesion molecules and severity of coronary atherosclerosis. ME...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200002000-00013
更新日期:2000-02-01 00:00:00
abstract:BACKGROUND:There are few reports regarding the concordance of coronary arterial response between acetylcholine (ACh) and ergonovine (ER) spasm provocation tests. OBJECTIVES:We attempted to perform selective spasm provocation tests to examine the incidence of provoked spasm in patients who had undergone first coronary ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200412000-00006
更新日期:2004-12-01 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the association of plasma osmolality with all-cause mortality in ST-segment elevation myocardial infarction (STEMI) patients treated with a primary percutaneous coronary intervention. METHODS:This study included 3748 patients (mean age 58.3±11.8 years, men 81%) with ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000426
更新日期:2017-01-01 00:00:00
abstract:BACKGROUND:Baseline coronary artery diameter and coronary artery dilation response to nitrate are associated with coronary vasoreactivity. OBJECTIVES:The present study investigated the predictive value of coronary artery tone for a positive intracoronary acetylcholine (ACh) provocation test. METHODS:A total of 197 pa...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000401
更新日期:2016-11-01 00:00:00
abstract:OBJECTIVES:We aimed to evaluate the management and outcomes of patients of the octogenarian age group with non-ST elevation myocardial infarction (NSTEMI) in a real-world setting. METHODS:The risk of 30-day and 1-year mortality by age and the time of coronary angiography [categorized as early (≤48 h of admission) and ...
journal_title:Coronary artery disease
pub_type: 杂志文章,多中心研究
doi:10.1097/MCA.0b013e32835c8f53
更新日期:2013-03-01 00:00:00
abstract::In the last 15 years, heart cell implantation to regenerate infarcted myocardium has gone from the bench to clinical trial. Several phase I and II controlled randomized trials showed the feasibility, the side effects and the potential efficacy of cell implantation after myocardial infarction in humans. Preclinical exp...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/00019501-200503000-00002
更新日期:2005-03-01 00:00:00
abstract::The thyroid hormone analogue DITPA is a promising potential new treatment for heart failure. Although the mechanism of action is incompletely determined, it is clear that DITPA improves systolic as well as diastolic function. It is also clear that the effects of DITPA are intrinsic to the muscle and not the result of ...
journal_title:Coronary artery disease
pub_type: 杂志文章,评审
doi:10.1097/00019501-199909000-00008
更新日期:1999-09-01 00:00:00
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journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200006000-00010
更新日期:2000-06-01 00:00:00
abstract:BACKGROUND:Levels of galectin-3, a member of a family of soluble β-galactoside-binding lectins, are reported to be higher in patients with type 2 diabetes mellitus (DM) and metabolic syndrome. Conflicting results exist on the effects of galectin-3 in diabetic patients. The aim of this study was to investigate the relat...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000252
更新日期:2015-08-01 00:00:00
abstract:BACKGROUND AND AIM:The association of HIV with coronary atherosclerosis has been established; however, the progression of coronary atherosclerosis over time among participants with HIV is not well known. The Multicenter AIDS Cohort Study Quantitative Coronary Plaque Progression Study is a large prospective multicenter ...
journal_title:Coronary artery disease
pub_type: 杂志文章,多中心研究
doi:10.1097/MCA.0000000000000546
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:Second-generation drug-eluting stents (DESs) have shown higher safety and efficacy compared with first-generation DESs. This effect was achieved by improving biocompatibility using an interalia cobalt-chromium construction, thinner stent struts and biodegradable polymers. OBJECTIVES:To assess clinical and a...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000325
更新日期:2016-03-01 00:00:00
abstract:OBJECTIVE:Fetuin-A is a circulating glycoprotein that is involved in various stages of atherosclerosis. Despite the fact that emerging evidence suggests fetuin-A acts as a calcification inhibitor that protects against advanced calcified atherosclerosis in dialyzed patients, the role of fetuin-A in cardiovascular diseas...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e32832fe5d5
更新日期:2010-08-01 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:OBJECTIVES:Red cell distribution width (RDW), a measure of red blood cell size heterogeneity, was evaluated in patients undergoing primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI). BACKGROUND:Higher RDW is associated with mortality in patients with symptomatic car...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e328342c77b
更新日期:2011-05-01 00:00:00
abstract:BACKGROUND:Adiponectin and resistin, which have counteracting effects, are suggested to be associated with inflammation and atherosclerosis. The relationship between their levels and prognosis in high risk patients is, however, still unclear. The aim of this study was to evaluate the prognostic values of these adipokin...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e328318ecb0
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND:The optimal timing of angiography and percutaneous coronary intervention (PCI) in patients with non-ST elevation acute coronary syndromes (NSTEACS) remains uncertain. We sought to assess clinical characteristics and outcomes of patients in real-world contemporary practice who have early versus delayed PCI fo...
journal_title:Coronary artery disease
pub_type: 杂志文章,多中心研究
doi:10.1097/MCA.0000000000000374
更新日期:2016-08-01 00:00:00
abstract:INTRODUCTION:The primary end points of randomized clinical trials evaluating the outcome of therapeutic strategies for coronary artery disease (CAD) have included nonfatal acute myocardial infarction, the need for further revascularization, and overall mortality. Noncardiac causes of death may distort the interpretatio...
journal_title:Coronary artery disease
pub_type: 杂志文章,随机对照试验
doi:10.1097/MCA.0b013e32834f112a
更新日期:2012-03-01 00:00:00
abstract:OBJECTIVE:Plasma nuclear and mitochondrial DNA (mtDNA) levels are altered in many diseases. However, it is not known whether they are also altered in acute myocardial infarction (AMI). In the present study, we examined plasma nuclear and mtDNA levels in the patients with AMI before and after a percutaneous coronary int...
journal_title:Coronary artery disease
pub_type: 社论
doi:10.1097/MCA.0000000000000231
更新日期:2015-06-01 00:00:00
abstract:BACKGROUND:We have previously identified a phenomenon that we called vascular rhexis (VR) after coronary occlusion in mice. To explore its potential pathogenetic impact on the destruction of vessels described, its potential universality, and its characterization as a scaffolding for evaluating amelioration, we studied ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e32835d6688
更新日期:2013-05-01 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:BACKGROUND:Coronary stenosis of the left anterior descending artery (LAD) is respected by cardiologists because of its negative influence on morbidity and mortality. An important anatomical consideration is the length of the LAD. OBJECTIVE:To investigate the relationship between length of LAD and coronary dominance. ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/00019501-200102000-00011
更新日期:2001-02-01 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:To evaluate the efficacy and safety of intracoronary administration of prourokinase via balloon catheter during primary percutaneous coronary interventions in patients with acute ST-segment elevation myocardial infarction. METHODS:Acute ST-segment elevation myocardial infarction patients underwent primary p...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000898
更新日期:2021-01-01 00:00:00
abstract:BACKGROUND:This study investigated whether the age, creatinine, and ejection fraction (ACEF) score [age (years) /ejection fraction (%) +1 (if creatinine>176μmol/L)] could predict 1-year outcomes following ST-segment elevation myocardial infarction after percutaneous coronary intervention, and whether accuracy could be ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0000000000000791
更新日期:2020-03-01 00:00:00
abstract:BACKGROUND:The degree of coronary collateral development is not same in every patient with similar degree of coronary stenosis. In animal studies monocyte chemoattractant protein-1 (MCP-1) has been found to be related to collateral vessel development. In this study we investigated whether a higher serum MCP-1 level is ...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e32833fd29b
更新日期:2010-12-01 00:00:00
abstract:OBJECTIVES:Slow coronary flow (SCF) has long since been identified and endothelial dysfunction and atherosclerosis of the epicardial coronary arteries and microvasculature are reported to be associated with SCF. Serum uric acid is an independent biochemical marker of atherosclerosis, oxidative stress and endothelial dy...
journal_title:Coronary artery disease
pub_type: 杂志文章
doi:10.1097/MCA.0b013e3282f0a2a7
更新日期:2007-12-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess the association of widowhood with the severity and extent of coronary artery disease (CAD), and whether it is modified by sex or socioeconomic status. PATIENTS AND METHODS:A total of 1068 patients undergoing coronary angiography at five centers in Saudi Arabia and the Uni...
journal_title:Coronary artery disease
pub_type: 杂志文章,多中心研究
doi:10.1097/MCA.0000000000000436
更新日期:2017-03-01 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::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