Abstract:
:Time-frequency maps of signal-averaged electrocardiogram based on a short time Fourier transform (STFT) technique analysis was employed to assess the presence of high frequency electrical transients (turbulence) and arrhythmia risk assessment. The optimal configuration set of STFT variables aiming at risk stratification for sustained monomorphic ventricular tachycardia (SMVT) is still undetermined. Different configuration variables, including analyzing time-window widths, starting positions, relative displacements, and zero-padding for STFT time-frequency maps constructions were combined on each analyzing averaged signal from 18 healthy controls and 18 subjects presenting inducible SMVT. Spectral turbulence analysis (STA) was, thus, carried out according to conventional procedures. The optimal configuration set of variables for STA was obtained by assessing the total diagnostic accuracy of all combinations of parameters. The optimal diagnostic performance was found at 86% total diagnostic accuracy as compared to 56% using previous defined normality thresholds (p=0.01). Present configuration set of variables is distinctive from previously defined set of variables and improves risk stratification.
journal_name
Int J Cardioljournal_title
International journal of cardiologyauthors
Benchimol-Barbosa PR,Nasario-Junior O,Nadal Jdoi
10.1016/j.ijcard.2009.04.013subject
Has Abstractpub_date
2010-11-05 00:00:00pages
59-61issue
1eissn
0167-5273issn
1874-1754pii
S0167-5273(09)00471-9journal_volume
145pub_type
信件abstract:BACKGROUND:Hepatic and renal dysfunction have been observed in survivors of the Fontan procedure, however their incidence and associated factors remain poorly defined. METHODS:A total of 152 participants from a Registry of 1528 patients underwent abdominal ultrasound, transient elastography (FibroScan), serum fibrosis...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2018.07.118
更新日期:2018-12-15 00:00:00
abstract:OBJECTIVES:We evaluate the crimping strain, sealing stress and contact forces on a Nitinol stent deployed in the aorta during endovascular aortic (or aneurysm) repair (EVAR) procedures. Nitinol shape memory effect (SME) is used. We also study the fluid-structure interaction (FSI) of the blood flow on the stented aorta....
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2019.11.091
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND:Studies of the association between hypertensive response (HR) in the exercise treadmill testing (ETT) and end organ damage are mostly cross-sectional and have not used ABPM. We investigated the association of different definitions of HR with incidence of hypertension by ABPM and development of cardiac struct...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2008.11.208
更新日期:2010-06-11 00:00:00
abstract:BACKGROUND:Nearly half of patients with heart failure (HF) have preserved ejection fraction (EF) and the mortality of patients with HF with preserved EF (HFpEF) is high. However, there is no therapy to improve survival in HFpEF. Although observational cohort studies (OCSs) have examined the survival benefit of beta-blo...
journal_title:International journal of cardiology
pub_type: 杂志文章,meta分析
doi:10.1016/j.ijcard.2016.11.239
更新日期:2017-02-01 00:00:00
abstract:BACKGROUND:Recent studies showed that J-waves are associated with vulnerability to ventricular fibrillation. Recently we reported the association between false tendons (FTs) and J-waves in a retrospective study. METHODS AND RESULTS:We prospectively studied 50 young healthy men (mean age 24.6±2.7 years). FTs were detec...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2014.01.101
更新日期:2014-03-15 00:00:00
abstract:BACKGROUND:Aortic stenosis (AS) poses a perioperative management dilemma to physicians looking after patients who require non-cardiac surgery. The objective of this review is to investigate mortality and adverse cardiovascular events in patients with and without AS who underwent non-cardiac surgery. METHODS:We searche...
journal_title:International journal of cardiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ijcard.2017.04.037
更新日期:2017-08-01 00:00:00
abstract:PURPOSE:Polycystic ovary syndrome (PCOS) is frequently accompanied by the presence of cardiovascular risk factors. It has also been recognized that there is a significant relationship between the autonomic nervous system and adverse cardiac events. Heart rate recovery (HRR) after exercise is a marker of parasympathetic...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2007.08.037
更新日期:2008-10-30 00:00:00
abstract::Cardiac hypertrophic program is a chronic, complex process, and occurs in response to long-term increases of hemodynamic load related to a variety of pathophysiological conditions. Mitochondria, known as "the cellular power plants", occupy about one-third of cardiomyocyte volume and supply roughly 90% of the adenosine...
journal_title:International journal of cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.ijcard.2012.09.082
更新日期:2013-08-20 00:00:00
abstract::In order to study the interrelationship between left ventricular afterload, estimated from the mean left ventricular wall stress, and the mechanical properties of the aorta, we have simultaneously measured systemic arterial compliance and left ventricular wall stress in 19 patients with congestive cardiomyopathy. The ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(84)90113-x
更新日期:1984-03-01 00:00:00
abstract:INTRODUCTION:Accurate predictors of good clinical response after MitraClip implant in patients with heart failure (HF) are still lacking. Aim of this study was to investigate the role of regurgitant fraction >50% as a marker of disproportionate functional mitral regurgitation (FMR) in identifying best responders to Mit...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2020.08.026
更新日期:2021-01-15 00:00:00
abstract:BACKGROUND:Dofetilide is a class III antiarrhythmic drug that has been reported to be safe and efficacious in the treatment of atrial dysrhythmias with a known initial risk of QT prolongation and torsades de pointes (TdP). As a result, the Federal Drug Administration (FDA) mandated in-hospital dofetilide initiation and...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2017.01.157
更新日期:2017-06-01 00:00:00
abstract::A case of left parasternal systolic lift due to isolated infarction of the right ventricular anterior wall is reported. This cause of a left parasternal lift should also be considered while examining a case of myocardial infarction. ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(93)90106-q
更新日期:1993-11-01 00:00:00
abstract::Giant right atrial aneurysm is a very rare congenital heart defect. We report a case which was diagnosed during fetal life and operated on at 4 months of age with excision of the aneurysmal part and pericardial patch closure. Early repair is recommended to prevent late complications such as arrhythmias and thromboembo...
journal_title:International journal of cardiology
pub_type: 信件
doi:10.1016/j.ijcard.2007.06.081
更新日期:2008-09-16 00:00:00
abstract:BACKGROUND:Although combined supine and prone acquisitions improve the detection of inferolateral obstructive coronary artery disease (CAD), the predictors of inaccurate detection of inferolateral ischemia have not been reported by using cadmium zinc telluride (CZT) myocardial perfusion imaging (MPI). METHODS AND RESU...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2014.04.069
更新日期:2014-06-15 00:00:00
abstract:BACKGROUND:Transradial access (RA) is associated with less complications and is preferred by patients. Vascular closure devices (VCDs) may improve discomfort and may reduce complications associated with transfemoral access. Aim was to evaluate complications and discomfort associated with percutaneous coronary procedure...
journal_title:International journal of cardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ijcard.2008.06.045
更新日期:2009-11-12 00:00:00
abstract:BACKGROUND:Paclitaxel-eluting stents (PES) have been shown to reduce the rate of restenosis and the need for repeated revascularization procedures compared with bare metal stents. However, long-term effects of paclitaxel on vascular function are unknown. The purpose of the present study was to assess coronary vasomotor...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2006.09.021
更新日期:2007-08-21 00:00:00
abstract:BACKGROUND:The role of type 2 diabetes (T2DM) on composition of thrombus has not been fully characterized in patients with ST-elevation myocardial infarction (STEMI). AIMS:To elucidate the differences between diabetic and non-diabetic patients with STEMI in relation to the composition of coronary thrombus, and the pot...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2017.04.089
更新日期:2017-09-15 00:00:00
abstract::Hearts with pressure-overload hypertrophy show an increased intracardiac activation of the renin-angiotensin system (RAS) which may contribute to myocardial ischemia and reperfusion injury. This study investigates whether the hypertrophied myocardium is more vulnerable to ischemia and reperfusion injury and whether th...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(94)90179-1
更新日期:1994-12-01 00:00:00
abstract::A low frequency of ischaemic heart diseases in Eskimos has been related to polyunsaturated fatty acids. We therefore studied fatty acid patterns associated with coronary artery disease (CAD) for a possible relationship between fatty acid profile and CAD diagnosis in Mediterranean patients. The gas chromatography metho...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/s0167-5273(00)00442-3
更新日期:2001-03-01 00:00:00
abstract:BACKGROUND:Aortic stenosis (AS) is an active disease, but the determinants of AS progression remain largely unknown. Low levels of Fetuin-A, a powerful inhibitor of ectopic calcification, have been linked to ectopic calcium tissue deposition but its role in AS progression has not been clearly evaluated. METHODS:In our...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2018.03.070
更新日期:2018-08-15 00:00:00
abstract:BACKGROUND:Late maternal mortality (up-to 1-year postpartum) is poorly reported globally and is commonly due to cardiovascular disease (CVD). We investigated targeted interventions aiming at reducing peripartum heart failure admission and late maternal death. METHODS AND RESULTS:Prospective single-centre study of 269 ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2018.07.140
更新日期:2018-12-01 00:00:00
abstract:OBJECTIVES:Aim of this study was to evaluate different response in platelet reactivity and vessel healing using high-resolution frequency-domain optical coherence tomography (FD-OCT) in patients with femoropopliteal artery disease treated with ZILVER PTX drug eluting stents (DES), and randomly assigned to clopidogrel o...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2020.01.024
更新日期:2020-04-01 00:00:00
abstract::The efficiency and safety of oleanolic acid (OA) and its isomer, ursolic acid (UA) in myocardial ischemia are poorly documented. This study appraised the efficacy of OA and UA in protecting the heart against oxidative damage induced by isoproterenol, since oxidative injury has been investigated as a potential initiato...
journal_title:International journal of cardiology
pub_type: 信件
doi:10.1016/j.ijcard.2006.07.108
更新日期:2007-06-25 00:00:00
abstract:BACKGROUND:Oxidative stress appears to be involved in several processes that contribute to atherogenesis and restenosis following vascular intervention. METHODS:The aim of our study was to evaluate prospectively the plasma concentrations of a hydroperoxide (ROOH) and nitric oxide end product (NO(x)) in patients subjec...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/s0167-5273(02)00472-2
更新日期:2003-06-01 00:00:00
abstract::A 57 year old woman, with newly diagnosed lung cancer and a large pericardial effusion in her echocardiogram, is presented in this case. No clinical or echocardiographic signs of tamponade physiology were initially detected. However, an excessive tricuspid annular respiratory fluctuation of the early diastolic velocit...
journal_title:International journal of cardiology
pub_type: 信件
doi:10.1016/j.ijcard.2009.08.035
更新日期:2011-08-18 00:00:00
abstract:BACKGROUND:Heparin is an important medication in the treatment of patients with unstable angina pectoris. We designed an observational study to compare the effects of standard heparin (SH) with low molecular weight heparin (LMWH) on vascular endothelial growth factor (VEGF) levels in patients undergoing coronary artery...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2003.03.022
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:In patients with chronic heart failure (CHF) increasing levels of total serum cholesterol are associated with improved survival - while statin usage is not. The impact of statin treatment on the "reverse epidemiology" of cholesterol is unclear. METHODS:2992 consecutive patients with non-ischemic CHF due to ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2017.03.028
更新日期:2017-07-01 00:00:00
abstract:INTRODUCTION:In this study, we sought to characterize the angio-vasculogenic property of human adipose tissue-derived stromal vascular fraction (SVF) and to determine the therapeutic potential of SVF in the context of experimental ischemia. Although human SVF is used for cell therapy, its angiogenic and vasculogenic ch...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2017.02.080
更新日期:2017-05-01 00:00:00
abstract::The current investigation sought to evaluate the relation between hemorheological properties and the metabolic syndrome. 1400 office workers aged 35 to 59 years were enrolled in this study. Waist circumference and blood pressure were determined. Plasma high-density lipoprotein (HDL cholesterol), triglyceride, fasting ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2005.11.104
更新日期:2006-09-20 00:00:00
abstract::To evaluate the effects of inotropic stimulation on ventriculo-arterial coupling, we determined both the slope of the end-systolic pressure-volume relationship (ventricular elastance) and the slope of end-systolic pressure-stroke volume relationship (arterial elastance) at rest and during dobutamine infusion (5 microg...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(91)90267-s
更新日期:1991-04-01 00:00:00