Abstract:
OBJECTIVES:This study was designed to determine whether imaging myocardial edema would identify acute myocardial ischemia before irreversible injury takes place. BACKGROUND:Early identification of acute myocardial ischemia is a diagnostic challenge. METHODS:We studied 15 dogs with serial T(2)-weighted and cine imaging at baseline, during transient coronary occlusion of up to 35 min, and after reperfusion in a 1.5-T magnetic resonance imaging system. Late gadolinium enhancement and troponin measurements were used to assess for the presence of irreversible injury. Myocardial water content was measured to assess myocardial edema. RESULTS:We consistently observed a transmural area of high T(2) signal intensity matching areas with new onset regional akinesia 28 +/- 4 min after experimental coronary artery occlusion. At this time, the contrast-to-noise ratio between the ischemic and remote myocardium had significantly increased from 1.0 +/- 2.0 to 12.8 +/- 9.6 (p < 0.003), which further increased after reperfusion to 15.8 +/- 10.3 (p < 0.004 compared with baseline). Neither myocardial late gadolinium enhancement nor troponin elevation were noted at this time window. Myocardial water content of the ischemic segments was consistently higher (68.9 +/- 2% vs. 67.0 +/- 2%; p < 0.004) than in remote segments and the difference correlated significantly to the contrast-to-noise ratio in T(2) images (p < 0.04). CONCLUSIONS:We provide the first evidence that T(2)-weighted cardiovascular magnetic resonance imaging of edema detects acute ischemic myocyte injury before the onset of irreversible injury. T(2)-weighted cardiovascular magnetic resonance imaging may serve as a very useful diagnostic marker in clinical settings such as unstable angina or evolving infarction.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Abdel-Aty H,Cocker M,Meek C,Tyberg JV,Friedrich MGdoi
10.1016/j.jacc.2008.10.065subject
Has Abstractpub_date
2009-04-07 00:00:00pages
1194-201issue
14eissn
0735-1097issn
1558-3597pii
S0735-1097(09)00228-9journal_volume
53pub_type
杂志文章abstract:OBJECTIVES:We sought to assess the risk of ischemic stroke from a patent foramen ovale (PFO) in the multiethnic prospective cohort of northern Manhattan. BACKGROUND:Patent foramen ovale has been associated with increased risk of ischemic stroke, mainly in case-control studies. The actual PFO-related stroke risk in the...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.08.063
更新日期:2007-02-20 00:00:00
abstract::Homocysteine is increasingly recognized as a risk factor for coronary artery disease. An understanding of its metabolism and of the importance of vitamins B6 and B12 and folate as well as enzyme levels in its regulation will aid the development of therapeutic strategies that, by lowering circulating concentrations, ma...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/0735-1097(95)00508-0
更新日期:1996-03-01 00:00:00
abstract::While acute myocardial infarction mortality declines, patients continue to face reinfarction and/or heart failure. The immune system, which intimately interacts with healthy and diseased tissues through resident and recruited leukocytes, is a central interface for a global host response to ischemia. Pathways that enha...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2015.02.034
更新日期:2015-04-21 00:00:00
abstract::Compared with traditional exercise tests, cardiopulmonary exercise testing (CPET) provides a thorough assessment of exercise integrative physiology involving the pulmonary, cardiovascular, muscular, and cellular oxidative systems. Due to the prognostic ability of key variables, CPET applications in cardiology have gro...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2017.08.012
更新日期:2017-09-26 00:00:00
abstract::Venous thromboembolism (VTE) is a common disease associated with high risk for recurrences, death, and late sequelae, accounting for substantial health care costs. Anticoagulant agents are the mainstay of treatment for deep vein thrombosis and pulmonary embolism. The recent availability of oral anticoagulant agents th...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2016.01.072
更新日期:2016-04-26 00:00:00
abstract::To be of clinical value in the treatment of heart failure, a drug must permit patients either to feel better or to live longer, or both. Yet, because the assessment of both quality and quantity of life is difficult, many investigators have proposed using alternate measures (namely, surrogate end points) that may indic...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90487-l
更新日期:1993-10-01 00:00:00
abstract:OBJECTIVES:We investigated the effects of a novel ultrapotent poly(adenosine diphosphate-ribose) polymerase (PARP) inhibitor, PJ34, on cardiac and endothelial dysfunction in a rat model of chronic heart failure (CHF). BACKGROUND:Overactivation of the nuclear enzyme PARP importantly contributes to the development of ce...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(02)02062-4
更新日期:2002-09-04 00:00:00
abstract:OBJECTIVES:The purpose of this study was to define the incidence and characterization of cardiovascular cause of sudden death in the young. BACKGROUND:The epidemiology of sudden cardiac death (SCD) in young adults is based on small studies and uncontrolled observations. Identifying causes of sudden death in this popul...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2011.01.049
更新日期:2011-09-13 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)00385-1
更新日期:1995-12-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(88)90456-1
更新日期:1988-10-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/s0735-1097(02)02768-7
更新日期:2003-02-05 00:00:00
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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.2005.10.046
更新日期:2006-03-07 00:00:00
abstract::The utility of using an endurance test as well as a maximal exercise test to assess the effect of amlodipine, a dihydropyridine calcium antagonist, was evaluated in 16 patients with angina pectoris. Amlodipine, 10 mg/day, was compared with placebo in a double blind crossover study. After a 2 week single blind placebo ...
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:10.1016/0735-1097(88)90323-3
更新日期:1988-09-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.jacc.2004.04.034
更新日期:2004-07-21 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00998-0
更新日期:2000-12-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2018.06.031
更新日期:2018-08-28 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(96)00027-7
更新日期:1996-05-01 00:00:00
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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
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2008.03.043
更新日期:2008-07-08 00:00:00
abstract:OBJECTIVES:This prospective study evaluated the association of obesity and hypertension with left atrial (LA) volume over 10 years. BACKGROUND:Although left atrial enlargement (LAE) is an independent risk factor for atrial fibrillation, stroke, and death, little information is available about determinants of LA size i...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.07.034
更新日期:2009-11-17 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.jacc.2017.03.557
更新日期:2017-05-23 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2012.06.016
更新日期:2012-10-09 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.07.051
更新日期:2006-12-05 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(88)90290-2
更新日期:1988-06-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90101-6
更新日期:1993-03-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.06.040
更新日期:2009-11-10 00:00:00
abstract::A 68 year old man had a diaphragmatic myocardial infarction and 9 months later was admitted with severe congestive heart failure (functional class IV). Cardiac catheterization demonstrated a postinfarction pseudoaneurysm. Because of a massive left to right shunt (pulmonary to systemic flow ratio = 2.7), concomitant ru...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(85)80284-9
更新日期:1985-07-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.09.054
更新日期:2007-03-13 00:00:00
abstract:OBJECTIVES:The aim of this study was to evaluate the immediate and long-term outcome of intracoronary stent implantation for the treatment of coronary artery bifurcation lesions. BACKGROUND:Balloon angioplasty of true coronary bifurcation lesions is associated with a lower success and higher complication rate than mos...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00648-8
更新日期:2000-03-15 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(84)80094-7
更新日期:1984-09-01 00:00:00