Abstract:
:Trapidil (triazolopyrimidine) possesses activity against platelet-derived growth factor-induced cellular proliferation in vitro and intimal proliferation in vivo. The objective of this study was to determine if trapidil could prevent restenosis in experimentally induced atherosclerotic rabbits. New Zealand White rabbits with preexisting iliac arterial lesions induced by balloon deendothelialization underwent balloon angioplasty. Arteriography was performed before, immediately after, and 4 weeks after the balloon dilatation. Tissue sections of the dilated arterial segment were also analyzed morphometrically. Seventeen rabbits were randomized to two groups: a control group (n = 8) and a trapidil-treated group (n = 9). The treatment group received 30 mg/kg s.c. trapidil twice daily. The angiographic luminal diameters before and after dilatation were similar. At the 4-week restudy, there was a significant preservation of luminal diameter in the trapidil group compared with the control group (1.27 +/- 0.20 vs. 0.94 +/- 0.48 mm, respectively; p less than 0.005). When luminal diameters immediately after dilatation were compared with diameters at the 4-week restudy (i.e., when the degree of restenosis was assessed), there was a greater luminal diameter reduction in the control group than in the trapidil group (0.70 +/- 0.44 vs. 0.30 +/- 0.25 mm, respectively; p = 0.005). By morphometric analyses, the luminal areas were also greater in the trapidil group than the control group (0.80 +/- 0.25 vs. 0.57 +/- 0.33 mm2, respectively; p = 0.03). Intimal thickness was significantly less for the trapidil group than for the control group (0.33 +/- 0.15 vs. 0.44 +/- 0.15 mm, respectively; p = 0.01), as well as medial thickness (0.09 +/- 0.03 vs. 0.11 +/- 0.03 mm, respectively; p = 0.01). In this study, trapidil significantly increased the luminal area and reduced the intimal thickness in the atherosclerotic rabbit iliac artery after balloon angioplasty.
journal_name
Circulationjournal_title
Circulationauthors
Liu MW,Roubin GS,Robinson KA,Black AJ,Hearn JA,Siegel RJ,King SB 3rddoi
10.1161/01.cir.81.3.1089subject
Has Abstractpub_date
1990-03-01 00:00:00pages
1089-93issue
3eissn
0009-7322issn
1524-4539journal_volume
81pub_type
杂志文章相关文献
CIRCULATION文献大全abstract:BACKGROUND:Aging is associated with an increased risk of women dying from coronary heart disease as well as from all causes combined. Alterations in the major biological risk factors for early coronary heart disease and all-cause mortality are frequently seen in aging. METHODS AND RESULTS:The present investigation tes...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.85.4.1265
更新日期:1992-04-01 00:00:00
abstract:BACKGROUND:Myocardial perfusion reserve can be noninvasively assessed with cardiovascular MR. In this study, the diagnostic accuracy of this technique for the detection of significant coronary artery stenosis was evaluated. METHODS AND RESULTS:In 15 patients with single-vessel coronary artery disease and 5 patients wi...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.101.12.1379
更新日期:2000-03-28 00:00:00
abstract::To test the hypothesis that an area of slow conduction is present during reentrant ventricular tachycardia in man, and that the earliest activation site during ventricular tachycardia is within or orthodromically just distal to the area of slow conduction in the reentry loop, we studied 12 episodes of ventricular tach...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.75.2.369
更新日期:1987-02-01 00:00:00
abstract:BACKGROUND:Little is known of the prognostic significance of mitral regurgitation (MR) on transcatheter aortic valve replacement (TAVR), the impact of TAVR on MR severity, and the variables associated with possible post-TAVR improvement in MR. We evaluated these issues in a multicenter registry of patients undergoing C...
journal_title:Circulation
pub_type: 杂志文章,多中心研究
doi:10.1161/CIRCULATIONAHA.113.001822
更新日期:2013-11-05 00:00:00
abstract:BACKGROUND:Percutaneous transluminal coronary angioplasty (PTCA) of the infarct-related artery was performed within 42 days of recombinant tissue-type plasminogen activator (rt-PA) administration in 1,414 of the 3,534 patients who participated in the Thrombolysis In Myocardial Infarction (TIMI) II study. Primary angiog...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.85.1.93
更新日期:1992-01-01 00:00:00
abstract:BACKGROUND:Drug-induced QT interval prolongation, a risk factor for life-threatening ventricular arrhythmias, is a potential side effect of many marketed and withdrawn medications. The contribution of common genetic variants previously associated with baseline QT interval to drug-induced QT prolongation and arrhythmias...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.116.023980
更新日期:2017-04-04 00:00:00
abstract:BACKGROUND:S100B, a 20-kDa, Ca2+-binding dimer, is a putative intrinsic negative regulator of myocardial hypertrophy expressed after myocardial infarction. S100B-overexpressing transgenic (TG) and S100B-knockout (KO) mice have been generated to assess the consequences of S100B expression and altered hypertrophy after i...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000154554.65287.F5
更新日期:2005-02-08 00:00:00
abstract:BACKGROUND:Cardiac growth and function may be modulated in part by trophic effects of neurohormones. Specifically, aldosterone has been shown to stimulate the growth of cardiac myocytes and the accumulation of cardiac extracellular matrix proteins. Moreover, a variant of the aldosterone synthase gene (a cytosine/thymid...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.99.17.2255
更新日期:1999-05-04 00:00:00
abstract:BACKGROUND:The late hemodynamic effects of preserving the papillary muscles during mitral valve replacement have not been evaluated. METHODS AND RESULTS:Sixteen patients who had chronic mitral regurgitation due to myxomatous degeneration were randomized to preservation (Pres group, n = 8) or no preservation (No Pres g...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1994-11-01 00:00:00
abstract:BACKGROUND:Inhaled nitric oxide (NO) is a potent and selective pulmonary vasodilator, which induces cGMP synthesis by activating soluble guanylate cyclase (sGC) in ventilated lung regions. Carbon monoxide (CO) has also been proposed to influence smooth muscle tone via activation of sGC. We examined whether direct stimu...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000144469.01521.8A
更新日期:2004-10-12 00:00:00
abstract::Retrograde coronary artery flow was observed angiographically in 43 patients with aortic stenosis and/or regurgitation. In the 24 patients with pure or predominant aortic stenosis, retrograde flow was seen in all 24 during end-systole. In the eight patients with pure aortic regurgitation, retrograde flow was seen main...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.54.3.494
更新日期:1976-09-01 00:00:00
abstract:BACKGROUND:Many patients with implanted cardioverter defibrillators (ICDs) receive adjunctive antiarrhythmic drug therapy, most commonly amiodarone or sotalol. The effects of these drugs on defibrillation energy requirements have not been previously assessed in a randomized controlled trial. METHODS AND RESULTS:The Op...
journal_title:Circulation
pub_type: 杂志文章,随机对照试验
doi:10.1161/CIRCULATIONAHA.106.618421
更新日期:2006-07-11 00:00:00
abstract:BACKGROUND:Exertional fatigue, which frequently limits exercise in patients with chronic heart failure, is associated with early anaerobic metabolism in skeletal muscle. The present study was designed to examine the skeletal muscle metabolic response to exercise in this disorder and determine the relation of reduced mu...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.84.4.1597
更新日期:1991-10-01 00:00:00
abstract:BACKGROUND:MicroRNAs (miRs) participate in many cardiac pathophysiological processes, including ischemia/reperfusion (I/R)-induced cardiac injury. Recently, we and others observed that miR-494 was downregulated in murine I/R-injured and human infarcted hearts. However, the functional consequence of miR-494 in response ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.110.964684
更新日期:2010-09-28 00:00:00
abstract:BACKGROUND:Atrial flutter (AFL) and atrial fibrillation (AF) frequently coexist, yet the specific relationship between these arrhythmias, and particularly whether sustained AFL leads to AF, is unknown. METHODS AND RESULTS:We investigated the electrophysiological consequences of chronic AFL using an ovine anatomic righ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/hc0202.102012
更新日期:2002-01-15 00:00:00
abstract:BACKGROUND:Stress cardiomyopathy (SCM) is a peculiar form of reversible left ventricular dysfunction seen predominantly in women and occurs in response to emotional or physical stress. Because dysfunction in SCM is reversible and that of acute myocardial infarction (MI) is not, we hypothesized that these fundamental me...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.113.002781
更新日期:2014-04-22 00:00:00
abstract:BACKGROUND:Esophageal injury is a potential complication after intraoperative or percutaneous transcatheter ablation of the posterior aspect of the left atrium. Understanding the spatial relations between the esophagus and the left atrium is essential to reduce risks. METHODS AND RESULTS:We examined by gross dissectio...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.105.551291
更新日期:2005-09-06 00:00:00
abstract:BACKGROUND:Interleukin (IL)-6-related cytokines share gp130 as the signal-transducing protein. Downstream of gp130, two signal-transducing pathways have been recognized, the Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway and the Ras-mitogen-activated protein kinase (MAPK) pathway. To d...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.94.10.2626
更新日期:1996-11-15 00:00:00
abstract:BACKGROUND:Exposure to risk factors such as hypertension or hypercholesterolemia decreases the bioavailability of endothelium-derived nitric oxide (NO) and impairs endothelium-dependent vasodilation. Recently, a circulating endogenous NO synthase inhibitor, asymmetric dimethylarginine (ADMA), has been detected in human...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.99.9.1141
更新日期:1999-03-09 00:00:00
abstract:BACKGROUND:Transfer of the coronary arteries is a crucial step during the arterial switch operation (ASO) for transposition of the great arteries. This retrospective study aims to assess the incidence and risk factors of coronary events after ASO and sensitivity of noninvasive tests in the diagnosis of the coronary obs...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.0000087902.67220.2b
更新日期:2003-09-09 00:00:00
abstract:BACKGROUND:This study evaluated the hypothesis that transendocardial injections of autologous mononuclear bone marrow cells in patients with end-stage ischemic heart disease could safely promote neovascularization and improve perfusion and myocardial contractility. METHODS AND RESULTS:Twenty-one patients were enrolled...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.CIR.0000070596.30552.8B
更新日期:2003-05-13 00:00:00
abstract::The purpose of this study was to examine high density lipoprotein cholesterol (HDL-C) levels in a sample of community-living women and men who consumed 1 drink of alcohol/day or less. Self-reports of alcohol consumption and clinical assessments of plasma lipid and lipoprotein levels were obtained twice, at 12 months a...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.cir.83.1.176
更新日期:1991-01-01 00:00:00
abstract:BACKGROUND:Aspirin is effective for the primary prevention of cardiovascular events, but it remains unclear for which subgroups of individuals aspirin is beneficial. We assessed the cost-effectiveness of aspirin separately for men and women of different ages with various levels of cardiovascular disease risk. METHODS ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.107.735340
更新日期:2008-06-03 00:00:00
abstract:BACKGROUND:In patients with neurogenic orthostatic hypotension (NOH), the availability of the sympathetic neurotransmitter norepinephrine (NE) in the synaptic cleft is insufficient to maintain blood pressure while in the standing posture. METHODS AND RESULTS:We determined the effect of oral administration of the synth...
journal_title:Circulation
pub_type: 临床试验,杂志文章
doi:10.1161/01.CIR.0000083721.49847.D7
更新日期:2003-08-12 00:00:00
abstract:BACKGROUND:Previous studies have shown that hypertrophy of surviving myocytes after myocardial infarction (MI) is limited. Progressive ventricular dilatation after MI may occur when compensatory hypertrophy cannot restore left ventricular (LV) wall stress to normal. METHODS AND RESULTS:To test whether induction of add...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.84.4.1819
更新日期:1991-10-01 00:00:00
abstract:BACKGROUND:Vascular endothelial growth factor (VEGF) is an endothelial cell-specific mitogen that is angiogenic in vitro and in vivo. It has been hypothesized that VEGF plays a role in myocardial collateral formation; however, the effects of VEGF on collateral flow to ischemic myocardium are unknown. METHODS AND RESUL...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.89.5.2183
更新日期:1994-05-01 00:00:00
abstract::We determined the efficacy, pharmacokinetics, and plasma concentration-response relationships of propafenone, a promising new antiarrhythmic drug. Thirteen patients with frequent and complex ventricular premature beats were studied after receiving four increasing doses, during drug washout and during a randomized doub...
journal_title:Circulation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1161/01.cir.68.3.589
更新日期:1983-09-01 00:00:00
abstract:BACKGROUND:Coronary flow reserve has been considered an important diagnostic index of the functional significance of coronary artery stenosis. With Doppler technique, it has been assessed as the ratio of hyperemic to basal coronary flow velocity (coronary flow velocity reserve [CFVR]) by invasive or semiinvasive method...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.cir.97.16.1557
更新日期:1998-04-28 00:00:00
abstract:BACKGROUND:The electrocardiographic short QT-interval syndrome forms a distinct clinical entity presenting with a high rate of sudden death and exceptionally short QT intervals. The disorder has recently been linked to gain-of-function mutation in KCNH2. The present study demonstrates that this disorder is genetically ...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/01.CIR.0000130409.72142.FE
更新日期:2004-05-25 00:00:00
abstract:BACKGROUND:The recent breakthrough in the generation of induced pluripotent stem (iPS) cells, which are almost indistinguishable from embryonic stem (ES) cells, facilitates the generation of murine disease- and human patient-specific stem cell lines. The aim of this study was to characterize the cardiac differentiation...
journal_title:Circulation
pub_type: 杂志文章
doi:10.1161/CIRCULATIONAHA.108.778795
更新日期:2008-07-29 00:00:00