Abstract:
OBJECTIVES:The aim of the study was to determine if isosorbide-5-mononitrate (IS-5-MN) 120 mg, taken once daily for 7 days, is associated with evidence of endothelial dysfunction and whether this effect is determined by increased free radical production. BACKGROUND:Tolerance to nitroglycerin is associated with increased free radical production and abnormal endothelial function. To date, no data is available concerning the effect of IS-5-MN, administered in clinically employed dosages, on endothelial function in humans. METHODS:A total of 19 healthy volunteers were randomized in a double-blind fashion to therapy with IS-5-MN (120 mg once daily) or placebo. After 7 days of treatment, forearm blood flow responses to acetylcholine (Ach; 7.5, 15, and 30 microg/min) and N-monomethyl-L-arginine (L-NMMA; 1, 2, and 4 mumol/min) were measured. In a separate study, after 7 days of therapy with IS-5-MN 120 mg once daily, the responses to Ach were assessed during intra-arterial coinfusion of vitamin C (24 mg/min) or saline. RESULTS:As compared with placebo, IS-5-MN caused significant blunting of the responses to both Ach (peak responses: placebo 127 +/- 31%; IS-5-MN 52 +/- 24%) and L-NMMA (peak responses: placebo 41 +/- 5%; IS-5-MN 22 +/- 8%). Vitamin C completely restored the forearm blood flow responses to Ach (peak responses: vitamin C 180 +/- 33%; saline 107 +/- 17%). CONCLUSIONS:We document for the first time that IS-5-MN impairs endothelial function in humans in vivo. Suggesting a role of oxygen free radicals, nitrate-induced abnormalities in endothelium-dependent vasomotor responses were reversed by the antioxidant vitamin C.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Thomas GR,DiFabio JM,Gori T,Parker JDdoi
10.1016/j.jacc.2006.10.074subject
Has Abstractpub_date
2007-03-27 00:00:00pages
1289-95issue
12eissn
0735-1097issn
1558-3597pii
S0735-1097(07)00132-5journal_volume
49pub_type
杂志文章,随机对照试验abstract:OBJECTIVES:The role of iron toward doxorubicin (DOX) cardiotoxicity was studied using a rodent model of dietary carbonyl iron loading. BACKGROUND:Doxorubicin, a commonly used anticancer drug, is known to cause serious and potentially life-threatening cardiotoxicity. Doxorubicin cardiotoxicity is thought to be mediated...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2007.02.060
更新日期:2007-06-26 00:00:00
abstract:BACKGROUND:Reperfusion therapy led to an important decline in mortality after ST-segment elevation myocardial infarction (STEMI). Because the rate of cardiogenic shock has not changed dramatically, the authors speculated that a reduction in the incidence or fatality rate of mechanical complications (MCs), the second ca...
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
abstract:OBJECTIVES:Our goal was to compare the safety and initial efficacy of AZD6140, the first reversible oral adenosine diphosphate receptor antagonist, with clopidogrel in patients with non-ST-segment elevation acute coronary syndromes (NSTE-ACS). BACKGROUND:AZD6140 achieves higher mean levels of platelet inhibition than ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.jacc.2007.07.053
更新日期:2007-11-06 00:00:00
abstract:OBJECTIVES:The purpose of the study was to assess the cardiovascular risk of impaired fasting glucose (IFG). BACKGROUND:The associations between IFG, incident type 2 diabetes mellitus (T2DM), and cardiovascular (CV) events remains unclear. METHODS:The MESA (Multi-Ethnic Study of Atherosclerosis) study included partic...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2011.03.025
更新日期:2011-07-05 00:00:00
abstract:OBJECTIVES:Because the renin-angiotensin-aldosterone system (RAS) modifies cardiovascular autonomic regulation, we studied the possible associations between baroreflex sensitivity (BRS) and polymorphism in the RAS genes. BACKGROUND:Wide intersubject variability in BRS is not well explained by cardiovascular risk facto...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00506-9
更新日期:2000-01-01 00:00:00
abstract::The Million Hearts Initiative has a goal of preventing 1 million heart attacks and strokes-the leading causes of mortality-through several public health and healthcare strategies by 2017. The American Heart Association and American College of Cardiology support the program. The Cardiovascular Risk Reduction Model was ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2016.10.018
更新日期:2017-03-28 00:00:00
abstract:BACKGROUND:The optimal timing of intervention in patients with asymptomatic severe aortic stenosis (AS) remains controversial. OBJECTIVES:This multicenter study sought to test and validate the prognostic value of the staging of cardiac damage in patients with asymptomatic moderate to severe AS. METHODS:This study ret...
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.2019.04.065
更新日期:2019-07-30 00:00:00
abstract:OBJECTIVES:We sought to derive gender-specific cardiovascular magnetic resonance (CMR) reference values for normative left ventricular (LV) anatomy and function in a healthy adult population of clinically relevant age. BACKGROUND:Cardiovascular magnetic resonance imaging is increasingly applied in the clinical setting...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(02)01712-6
更新日期:2002-03-20 00:00:00
abstract:OBJECTIVES:The goal of this study was to evaluate the effect of smoking on the pharmacokinetics and pharmacodynamics (PD) of clopidogrel and prasugrel therapy. BACKGROUND:Major randomized trial data demonstrated that nonsmokers experience less or no benefit from clopidogrel treatment compared with smokers (i.e., the "...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.jacc.2013.03.037
更新日期:2013-08-06 00:00:00
abstract:OBJECTIVES:This study aimed to evaluate the technical feasibility and hemodynamic benefit of cardiac resynchronization therapy (CRT) in patients with systemic right ventricle (RV). BACKGROUND:Patients with a systemic RV are at high risk of developing heart failure. Cardiac resynchronization therapy may improve RV func...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2004.08.044
更新日期:2004-11-02 00:00:00
abstract::The normal anatomic relation of the anterior mitral leaflet to the left ventricular outflow tract suggests that significant aortic regurgitation should have a predictable hemodynamic effect on the motion and configuration of the leaflet, an effect that should be seen by two-dimensional echocardiography. Previous repor...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(84)80031-5
更新日期:1984-02-01 00:00:00
abstract:OBJECTIVES:This study compared the efficacy and safety of two antitachycardia pacing algorithms in the treatment of ventricular tachycardia. BACKGROUND:There is agreement that antitachycardia pacing should be adapted to tachycardia rate and be delivered in a burst, but the ideal pacing pattern is not well understood. ...
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(93)90318-u
更新日期:1993-05-01 00:00:00
abstract::To determine the effect of increasing heart rate on mitral flow velocity variables, the time constant of left ventricular isovolumic relaxation and the transmitral pressure gradient, 16 lightly sedated, conscious dogs were studied with Doppler echocardiography during incremental right atrial pacing (n = 16) or the adm...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90731-n
更新日期:1991-01-01 00:00:00
abstract:OBJECTIVES:The study evaluated the risk of cardiovascular mortality according to combined spontaneous (non-treatment-related) changes in both systolic and diastolic blood pressure (BP). BACKGROUND:Long-term longitudinal changes in blood pressure may be a more accurate determinant of cardiovascular risk since changes i...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00586-0
更新日期:2000-03-01 00:00:00
abstract::Despite the wide contemporary availability of pharmacological and mechanical means of reperfusion, a very significant proportion of ST-segment elevation myocardial infarction (STEMI) patients are still not offered any reperfusion therapy, and some of them are considered "ineligible for reperfusion." Spontaneous reperf...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2009.11.087
更新日期:2010-05-04 00:00:00
abstract:OBJECTIVES:Because pulmonary thromboendarterectomy (PTE) can result in an immediate reduction in pulmonary artery (PA) pressure, we sought to evaluate the effect of PTE on severe tricuspid regurgitation (TR) without tricuspid annuloplasty. BACKGROUND:Few data exist regarding the frequency and magnitude of functional T...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2003.12.058
更新日期:2004-07-07 00:00:00
abstract:OBJECTIVES:We sought to examine whether marine-derived n-3 fatty acids are associated with less atherosclerosis in Japanese versus white populations in the U.S. BACKGROUND:Marine-derived n-3 fatty acids at low levels are cardioprotective through their antiarrhythmic effect. METHODS:A population-based cross-sectional ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2008.03.047
更新日期:2008-08-05 00:00:00
abstract::Myocardial ischemia of short duration (15 to 20 min) produces myocardial "stunning" during reperfusion. The vasoregulatory and contractile status of reperfused myocardium during normal and reduced perfusion pressures is of interest in the treatment of patients with unstable angina. In the present study the effects of ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90813-o
更新日期:1991-09-01 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:This study attempted to determine which lesion characteristics are associated with reocclusion by 18 to 36 h. BACKGROUND:Reocclusion of the infarct-related artery after successful reperfusion is associated with significant morbidity and up to a threefold increase in mortality. METHODS:Two hundred seventy-e...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/0735-1097(94)00423-n
更新日期:1995-03-01 00:00:00
abstract::This review article focuses on the morphological and functional alterations that characterize patients with myocardial bridges (MB) as well as the currently available diagnostic and treatment strategies. Because of incomplete understanding of the pathophysiology of MB, their clinical significance has been the subject ...
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
abstract:OBJECTIVES:We sought to develop a high-yield canine model of sudden cardiac death (SCD). BACKGROUND:Because electrical stimulation is a powerful means to elicit nerve sprouting, we hypothesize that subthreshold electrical stimulation is more effective than nerve growth factor (NGF) infusion in inducing nerve sprouting...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2003.07.053
更新日期:2004-03-03 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:BACKGROUND:Short-term exposure to ambient air pollution has been linked to occurrence of myocardial infarction (MI); however, only a limited number of studies investigated its association with death from MI, and the results remain inconsistent. OBJECTIVES:This study sought to investigate the association of short-term ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2020.11.033
更新日期:2021-01-26 00:00:00
abstract:OBJECTIVES:This study sought to determine the relationship between coronary calcification and plaque progression in response to established medical therapies. BACKGROUND:Coronary calcification correlates with the extent of atherosclerosis and predicts clinical outcome. METHODS:Atheroma volume was determined in serial...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.10.038
更新日期:2007-01-16 00:00:00
abstract:OBJECTIVES:We evaluated metallothionein (MT)-mediated cardioprotection from angiotensin II (Ang II)-induced pathologic remodeling with and without underlying diabetes. BACKGROUND:Cardiac-specific metallothionein-overexpressing transgenic (MT-TG) mice are resistant to diabetic cardiomyopathy largely because of the anti...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2008.05.019
更新日期:2008-08-19 00:00:00
abstract:OBJECTIVES:We studied whether direct assessment of the hemodynamic response to exercise could improve the prognostic evaluation of patients with heart failure (HF) and identify those in whom the main cause of the reduced functional capacity is related to extracardiac factors. BACKGROUND:Peak exercise oxygen consumptio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)00672-x
更新日期:1999-03-15 00:00:00
abstract:OBJECTIVES:The purpose of this study is to investigate the role of endogenous endothelin-1 (ET-1) in myocardial growth in Bio 14.6 Syrian cardiomyopathic hamsters (Bio). BACKGROUND:While ET-1, as a growth-promoting peptide, has been implicated in the development of secondary cardiac hypertrophy, the role of endogenous...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)00564-6
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVES:The objective of this study was to ascertain whether the reversal of low peak filling rates after administration of calcium channel blockers in patients with diastolic dysfunction indicates true improvement in the rate of ventricular relaxation and left ventricular end-diastolic pressure measured by invasive...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90735-j
更新日期:1993-01-01 00:00:00
abstract:OBJECTIVES:This study examined the effect of endocardial and transthoracic direct current (DC) shocks on left atrial and left atrial appendage function in humans with structural heart disease. BACKGROUND:DC cardioversion of atrial fibrillation (AF) to sinus rhythm is associated with transient left atrial and left atri...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)00121-1
更新日期:1998-05-01 00:00:00