Abstract:
:In an attempt to determine whether mural thrombus in a dilated left ventricle is associated with specific flow patterns, a study was undertaken to assess qualitatively and quantitatively the flow characteristics by conventional pulsed and two-dimensional Doppler color flow examination. Forty patients with cardiomyopathy formed the study group (20 with an apical thrombus and 20 without). The groups did not differ with respect to age, gender, origin of ventricular dysfunction, ventricular size and ejection fraction. Guided by the Doppler color flow pattern, a quantitative analysis of flow velocity profile in the ventricular inflow and outflow "compartments" was performed by serial pulsed wave Doppler sampling. Inflow velocity at the ventricular apex was significantly lower in the thrombus group than in the no thrombus group (11.7 +/- 15.3 versus 28.3 +/- 10.5 cm/s, p less than 0.0001). Flow velocities were generally lower in the thrombus group at the other levels in the inflow compartment (that is, mitral anulus, leaflet tips and papillary muscle level). The systolic flow velocity at the apex was similarly significantly lower in the thrombus group than in the no thrombus group (7.1 +/- 8.1 versus 15.3 +/- 7.0 cm/s, p less than 0.001). Additionally, a higher prevalence of mitral regurgitation was noted in the no thrombus group (14 patients) than in the thrombus group (3 patients). Thus, specific abnormal flow profiles are associated with a left ventricular thrombus. Whether the abnormal flow is a primary event in the genesis of left ventricular thrombus or occurs secondary to development of the thrombus cannot be determined from this study.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Maze SS,Kotler MN,Parry WRdoi
10.1016/0735-1097(89)90230-1subject
Has Abstractpub_date
1989-03-15 00:00:00pages
873-81issue
4eissn
0735-1097issn
1558-3597pii
0735-1097(89)90230-1journal_volume
13pub_type
杂志文章abstract:OBJECTIVES:The purpose of this study was to establish the prognostic value of measuring heart fatty acid-binding protein (H-FABP) in patients with suspected acute coronary syndrome (ACS) (in particular, low- to intermediate-risk patients), in addition to troponin measured with the latest third-generation troponin assay...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.12.062
更新日期:2010-06-08 00:00:00
abstract::Ischemic heart disease is a complex disease process caused by the development of coronary atherosclerosis, with downstream effects on the left ventricular myocardium. It is characterized by a long preclinical phase, abrupt development of myocardial infarction, and more chronic disease states such as stable angina and ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2016.08.047
更新日期:2016-11-15 00:00:00
abstract::The calcium channel blocking agent, nifedipine, has been shown to improve indexes of left ventricular relaxation, diastolic filling and compliance in patients with hypertrophic cardiomyopathy. The mechanism of action of nifedipine on diastolic properties in patients with hypertrophic cardiomyopathy is unclear and coul...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80235-6
更新日期:1983-11-01 00:00:00
abstract::Drug efficacy and pharmacokinetics were assessed in 63 patients, aged 5 days to 30 years (mean 8 years), who received flecainide acetate for control of resistant arrhythmias. Doses of flecainide ranged from 59 to 225 mg/m2 body surface area per day (mean 141) in divided doses every 8 to 12 h and serum trough levels ra...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(89)90070-3
更新日期:1989-07-01 00:00:00
abstract:OBJECTIVES:We investigated the impact of an inactive endocardial lead on the 50% effective dose (ED50%) for successful ventricular defibrillation. BACKGROUND:The presence of abandoned epicardial mesh patch electrodes detrimentally affects the defibrillation efficacy of an endocardial lead system. It is not known wheth...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(96)00573-6
更新日期:1997-03-15 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine if the atrial response upon cessation of ventricular pacing associated with 1:1 ventriculoatrial conduction during paroxysmal supraventricular tachycardia is a useful diagnostic maneuver in the electrophysiology laboratory. BACKGROUND:Despite various maneuvers, it c...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)00614-7
更新日期:1999-03-01 00:00:00
abstract:OBJECTIVES:We assessed the hypothesis that changes in endothelial vasomotor function in response to optimized therapy for atherosclerotic coronary artery disease predict future cardiovascular events. BACKGROUND:Although endothelial vasomotor dysfunction is a predictor of cardiovascular events, it remains unclear wheth...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2008.08.074
更新日期:2009-01-27 00:00:00
abstract:OBJECTIVES:The purpose of this study was to test the hypothesis that the Duke treadmill score works less well for risk stratification in patients age 75 years or above. BACKGROUND:Although the Duke treadmill score is generally effective for risk stratification, its prognostic value in the elderly may be limited becaus...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(02)01769-2
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:The purpose of the study was to determine the independent and additive prognostic value of brain natriuretic peptide (BNP) in patients with severe asymptomatic mitral regurgitation and normal left ventricular function. BACKGROUND:Early surgery could be advisable in selected patients with chronic severe mitr...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.06.013
更新日期:2009-09-15 00:00:00
abstract::More than 1 million heart failure hospitalizations occur annually, and congestion is the predominant cause. Rehospitalizations for recurrent congestion portend poor outcomes independently of age and renal function. Persistent congestion trumps serum creatinine increases in predicting adverse heart failure outcomes. No...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2017.03.528
更新日期:2017-05-16 00:00:00
abstract::The M-mode and two-dimensional echocardiograms of 40 young patients were analyzed to compare the mean circumferential fiber shortening velocity (Vcf) of the left ventricle calculated separately by two methods. The mean circumferential fiber shortening velocity was derived from the M-mode echocardiogram as minor axis s...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80379-9
更新日期:1983-07-01 00:00:00
abstract:OBJECTIVES:This study sought to examine the efficacy of empiric antiarrhythmic drugs in a rigorously characterized cohort of arrhythmogenic right ventricular cardiomyopathy (ARVC) patients. BACKGROUND:Antiarrhythmic drugs are important in protecting against ventricular arrhythmias in ARVC, but no studies have provided...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.04.052
更新日期:2009-08-11 00:00:00
abstract:OBJECTIVES:This report describes the results of the Food and Drug Administration's phase 1 and 2 clinical trials of intravascular stents at Texas Children's Hospital. BACKGROUND:Since the late 1980s, intravascular stent implantation for the treatment of arterial and venous stenoses in congenital heart disease has been...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(97)00535-4
更新日期:1998-03-01 00:00:00
abstract:OBJECTIVES:We sought to assess the efficacy and safety of thrombolytic therapy in patients with an acute pulmonary embolism (PE). BACKGROUND:Thrombolytic therapy is approved for the treatment of acute PE; however, the safety and efficacy of this therapy remain debated. METHODS:A meta-analysis of randomized, controlle...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,meta分析
doi:10.1016/s0735-1097(02)02381-1
更新日期:2002-11-06 00:00:00
abstract:OBJECTIVES:This study was designed to investigate the association between hypertension and aortic valve stenosis (AVS) in a rabbit model. BACKGROUND:Degenerative AVS is a prevalent disease in elderly persons. Its molecular mechanisms remain unclear, in part because of the absence of experimental models. Epidemiologic ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2005.12.070
更新日期:2006-06-06 00:00:00
abstract:OBJECTIVES:We investigated the association between alcohol consumption and incident congestive heart failure (CHF) both overall and after adjusting for incident myocardial infarction (MI). BACKGROUND:Moderate alcohol consumption has been associated with lower risk of CHF and MI. METHODS:The Cardiovascular Health stud...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.02.066
更新日期:2006-07-18 00:00:00
abstract::To determine the relation between left ventricular performance during exercise and the extent of coronary artery disease, the results of exercise radionuclide ventriculography were analyzed in 65 patients who also underwent cardiac catheterization. A scoring system was used to quantitate the extent of coronary artery ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80101-6
更新日期:1983-04-01 00:00:00
abstract::To investigate the use of high energy ultrasound as an alternative energy for angioplasty, an experimental ultrasonic angioplasty device was developed. The device was studied in two bioassay systems: an in vitro system for the disruption of atherosclerotic plaques and thrombi and an in vivo system for the recanalizati...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(90)90651-5
更新日期:1990-03-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to determine long-term effects of stent-based paclitaxel delivery on amount, rate and composition of neointimal thickening after stent implantation. BACKGROUND:Paclitaxel prevents vascular smooth muscle cell proliferation and migration in vitro and in vivo. These actions, coupl...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)01020-2
更新日期:2000-12-01 00:00:00
abstract:OBJECTIVES:We prospectively compared coronary endothelial dysfunction in patients with zotarolimus-eluting stent (ZES) versus sirolimus-eluting stent (SES) implantation at 6-month follow-up. BACKGROUND:A ZES has been associated with uniform and rapid healing of the endothelium. METHODS:Fifty patients were randomly tr...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jacc.2009.01.051
更新日期:2009-05-05 00:00:00
abstract:OBJECTIVE:To review the literature systematically to determine whether noninvasive or invasive risk stratification, such as with an electrophysiological study of patients with asymptomatic pre-excitation, reduces the risk of arrhythmic events and improves patient outcomes. METHODS:PubMed, EMBASE, and the Cochrane Cent...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2015.09.018
更新日期:2016-04-05 00:00:00
abstract:OBJECTIVES:This study assessed the predictive value of preprocedural C-reactive protein (CRP) levels on six-month clinical and angiographic outcome in patients undergoing coronary stent implantation. BACKGROUND:Recent data indicate that low-grade inflammation as detected by elevated CRP serum levels predicts the risk ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)01193-1
更新日期:2001-03-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to identify qualitative or quantitative variables present on angioscopy, intravascular ultrasound imaging or quantitative coronary arteriography that were associated with adverse clinical outcome after coronary intervention in high risk patients. BACKGROUND:Patients with acute ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(96)00102-7
更新日期:1996-07-01 00:00:00
abstract:OBJECTIVES:This study investigated serial changes in regional right ventricular free wall and interventricular septal wall lengths during the first 4 to 5 years after an index anterior wall myocardial infarction. BACKGROUND:We previously demonstrated that remodeling after anterior wall myocardial infarction was a bive...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)80012-6
更新日期:1995-08-01 00:00:00
abstract::Timely administration of thrombolytic therapy decreases myocardial infarct size, lessens the incidence of congestive heart failure and improves survival. However, available data suggest that only 10% of patients with acute infarction in the United States receive thrombolytic drugs. Given the benefits of thrombolytic t...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/0735-1097(90)90482-5
更新日期:1990-07-01 00:00:00
abstract:BACKGROUND:Although guideline-recommended therapies reduce major adverse cardiovascular events (MACE) in patients after myocardial infarction (MI) or those with atherosclerotic disease (ATH), adherence is poor. OBJECTIVES:The goal of this study was to determine the association between medication adherence levels and l...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jacc.2016.06.005
更新日期:2016-08-23 00:00:00
abstract::To evaluate the effectiveness and cost of low osmolarity, nonionic contrast agents for cardiac angiography, 443 patients were randomized to receive either iopamidol or diatrizoate. All adverse events that occurred within 24 h of the procedure were recorded prospectively by study personnel and classified according to p...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0735-1097(10)80335-3
更新日期:1990-10-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to examine whether restrictive right ventricular (RV) physiology (the presence of antegrade pulmonary arterial flow in late diastole) occurred in patients with moderate to severe isolated pulmonary valvular stenosis (PVS) and to estimate its prevalence and relationship to RV functio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2007.06.042
更新日期:2007-10-09 00:00:00
abstract::Doppler echocardiography was performed in 80 consecutive patients (22 men, 58 women), aged 38 +/- 16 years, who had mitral valve prolapse diagnosed by two-dimensional echocardiography. Of the 80 patients, 16 (20%) were asymptomatic and 11 (14%) had a normal physical examination (no click or murmur). The M-mode echocar...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80214-5
更新日期:1986-05-01 00:00:00
abstract:OBJECTIVES:We describe a new stepwise anatomically and electrogram-guided strategy for radiofrequency catheter ablation of the fast pathway. BACKGROUND:Anatomically and electrogram-guided approaches have been developed for slow pathway ablation in patients with atrioventricular (AV) node reentrant tachycardia; however...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(94)00509-o
更新日期:1995-04-01 00:00:00