Abstract:
OBJECTIVES:This study was designed to elucidate the location and mechanism of typical atrial flutter in the transplanted heart. BACKGROUND:Although the F wave morphology in atrial flutter is similar in nontransplanted and transplanted hearts, the surgical incision needed for the atrial anastomosis may create a distinct electrophysiologic substrate of atrial flutter. METHODS:Entrainment from the lateral wall of the right atrium and interatrial septum was used to determine the location of atrial flutter in five patients with a transplanted heart and six patients with a nontransplanted heart. The difference between the first postpacing interval (FPPI) and the flutter cycle length (FCL) was used as an index of proximity to the circuit. RESULTS:In the transplant group, the FPPI was equal to the FCL at sites located close to the tricuspid annulus (TA); the mean differences (+/-SD) were 1 +/- 5 and -1 +/- 2 ms at the lateral wall and interatrial septum, respectively. However, from sites close to the surgical incision at the lateral wall and at the interatrial septum, these differences were significantly longer (29 +/- 12 and 27 +/- 9 ms, respectively, p < 0.05). In the nontransplant group, the FPPI was similar to the FCL at points in the lateral wall and interatrial septum close to the TA (mean difference 7 +/- 6 and 6 +/- 11 ms, respectively) and at sites close to the crista terminalis (CT) in the lateral wall (mean difference 4 +/- 4 ms). However, in sites separated from the TA at the interatrial septum the difference was markedly longer (35 +/- 11 ms, p < 0.05). CONCLUSIONS:Atrial flutter in transplanted hearts may best be explained by macroreentry around the tricuspid ring. In non-transplanted hearts a different structure (perhaps the CT?) may be the basis for atrial flutter at the lateral wall.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Arenal A,Almendral J,Muñoz R,Villacastín J,Merino JL,Palomo J,García Robles JA,Peinado R,Delcán JLdoi
10.1016/s0735-1097(97)00186-1subject
Has Abstractpub_date
1997-08-01 00:00:00pages
539-46issue
2eissn
0735-1097issn
1558-3597pii
S0735109797001861journal_volume
30pub_type
杂志文章abstract::Recent experimental studies show that the opioid system is important to the pathophysiology of cardiovascular impairment in congestive heart failure. Plasma beta-endorphin levels were measured in 37 patients with congestive heart failure and compared with those of 21 age- and gender-matched normal subjects. The relati...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90703-c
更新日期:1991-01-01 00:00:00
abstract::The antiarrhythmic effects of verapamil, 17-monochloracetylajmaline, mexiletine and amiodarone were compared in 14 patients with chagasic myocarditis. Drugs and placebo were administered orally in the following order: placebo and verapamil, placebo and 17-monochloracetylajmaline, placebo and mexiletine (1 week each) a...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80232-7
更新日期:1986-05-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to investigate the significance of non-type 1 anterior early repolarization (NT1-AER) combined with inferolateral early repolarization syndrome (ERS). BACKGROUND:Inferolateral ERS might be a heterogeneous entity, although it excludes type 1 Brugada syndrome (BS). METHODS:Of 84 pat...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2013.05.081
更新日期:2013-10-22 00:00:00
abstract::It has been suggested that intracardiac lymphatics may play a role in the pathophysiologic processes involving the conduction system. To test the possibility of linkage between the ventricular septum and the atrioventricular (AV) node, india ink was injected into the ventricular septum of freshly removed human hearts....
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80114-4
更新日期:1983-04-01 00:00:00
abstract:OBJECTIVES:We sought to assess whether statin-mediated reductions in low-density lipoprotein cholesterol (LDL-C) are associated with an increased risk of cancer. BACKGROUND:We recently reported an inverse association between on-treatment LDL-C levels and incident cancer in statin-treated patients enrolled in large ran...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,meta分析
doi:10.1016/j.jacc.2008.06.037
更新日期:2008-09-30 00:00:00
abstract:OBJECTIVE:This study sought to test the efficacy of phosphodiesterase type 5A (PDE5A) inhibition for treating advanced hypertrophy/remodeling caused by pressure overload, and to elucidate cellular and molecular mechanisms for this response. BACKGROUND:Sildenafil (SIL) inhibits cyclic guanosine monophosphate-specific P...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2008.08.069
更新日期:2009-01-13 00:00:00
abstract::A definite diagnosis of anterior myocardial infarction is often difficult to make in patients when a pattern of poor R wave progression in the precordial leads is present on the electrocardiogram. The purpose of this study was to determine whether a mathematical model could be devised to identify patients with anterio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80332-5
更新日期:1983-12-01 00:00:00
abstract:OBJECTIVES:This study aimed to investigate the effect of both history of intermittent atrial tachyarrhythmias (IAT) and in-trial IAT on the risk of heart failure (HF) or death comparing cardiac resynchronization therapy with defibrillator (CRT-D) to implantable cardioverter-defibrillator (ICD) treatment in mildly sympt...
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.2013.10.074
更新日期:2014-04-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to assess mechanisms underlying atrial fibrillation (AF) promotion by exercise training in an animal model. BACKGROUND:High-level exercise training promotes AF, but the underlying mechanisms are unclear. METHODS:AF susceptibility was assessed by programmed stimulation in rats aft...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2013.01.091
更新日期:2013-07-02 00:00:00
abstract:OBJECTIVES:The Total Ischemic Burden Bisoprolol Study (TIBBS) follow-up examined cardiac event rates in relation to transient ischemia and its treatment. BACKGROUND:It is unclear whether transient ischemia on the ambulatory electrocardiogram has prognostic implications in stable angina and whether medical treatment ca...
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(96)00122-2
更新日期:1996-07-01 00:00:00
abstract::Though he received his medical education in Edinburgh, William Withering was born and bred, and conducted his practice, in the Midlands of England, where he collaborated closely with medical and nonmedical colleagues who were pioneers of intellectual thought during the industrial revolution. Because of his profound bo...
journal_title:Journal of the American College of Cardiology
pub_type: 传,历史文章,杂志文章
doi:10.1016/s0735-1097(85)80457-5
更新日期:1985-05-01 00:00:00
abstract::All patients with stable ischemic heart disease (SIHD) should be managed with guideline-directed medical therapy (GDMT), which reduces progression of atherosclerosis and prevents coronary thrombosis. Revascularization is also indicated in patients with SIHD and progressive or refractory symptoms, despite medical manag...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2015.09.056
更新日期:2016-01-05 00:00:00
abstract:BACKGROUND:Familial restrictive cardiomyopathy (FRCM) has a poor prognosis due to diastolic dysfunction and restrictive physiology (RP). Myocardial stiffness, with or without fibrosis, underlie RP, but the mechanism(s) of restrictive remodeling is unclear. Myopalladin (MYPN) is a messenger molecule that links structura...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2014.09.071
更新日期:2014-12-30 00:00:00
abstract:OBJECTIVES:The aim of this study was to compare the frequency of angiographic restenosis and clinical events between a paclitaxel-eluting stent (PES) and a similar bare-metal stent (BMS) in saphenous vein graft (SVG) lesions. BACKGROUND:There are conflicting and mostly retrospective data on outcomes after drug-eluting...
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.2008.11.029
更新日期:2009-03-17 00:00:00
abstract:OBJECTIVES:This study investigated the impact on recurrences of 2 different substrate approaches for the treatment of these arrhythmias. BACKGROUND:Catheter ablation of electrical storms (ES) for ventricular arrhythmias (VAs) has shown moderate long-term efficacy in patients with ischemic cardiomyopathy. METHODS:Nine...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2012.03.044
更新日期:2012-07-10 00:00:00
abstract::Because the use of herbal therapies in the U.S. is escalating, it is essential to be aware of clinical and adverse effects, doses and potential drug-herb interactions. A consumer poll in 1998 indicated that one-third of respondents use botanical remedies, and nearly one in five taking prescription medications also use...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/s0735-1097(02)01749-7
更新日期:2002-04-03 00:00:00
abstract:OBJECTIVES:The purpose of this study was to evaluate the effects of mibefradil (Ro 40-5967) on the frequency and duration of episodes of asymptomatic ischemia in patients with stable angina pectoris and to determine the most efficient single therapeutic dose of this drug. BACKGROUND:Mibefradil is a novel calcium chann...
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(95)00472-6
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVES:The objective of this study was to determine the frequency of pulmonary complications, feasibility of early hospital discharge and requirements for postoperative inotropic and chronotropic support in patients receiving amiodarone therapy before heart transplantation. BACKGROUND:Although many patients waitin...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/0735-1097(92)90450-2
更新日期:1992-12-01 00:00:00
abstract::Electrophysiologic studies were performed at 12.7 +/- 4 months postoperatively in 20 patients who had the arterial switch repair at 1 to 120 days (mean 13 +/- 26 [SD]) for d-transposition of the great arteries. Preoperative electrocardiograms (ECGs) at rest revealed an ectopic atrial rhythm in one patient. Postoperati...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(88)90379-8
更新日期:1988-07-01 00:00:00
abstract:OBJECTIVES:We sought to evaluate the effectiveness of salt and fludrocortisone versus placebo in the prevention of syncope recurrence in children. BACKGROUND:Intravascular volume expansion with fludrocortisone and salt has been reported to be effective in the treatment of syncope in children. However, no pediatric pla...
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/j.jacc.2004.11.033
更新日期:2005-02-15 00:00:00
abstract:OBJECTIVES:This study sought to determine whether epicardial fat volume predicts coronary events in the general population. BACKGROUND:Epicardial adipose tissue (EAT) is suggested to promote plaque development in the coronary artery tree. METHODS:We quantified EAT volume in participants from the prospective populatio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2012.11.062
更新日期:2013-04-02 00:00:00
abstract:OBJECTIVES:We sought to determine the effect of tezosentan in patients with acute decompensated heart failure (HF) associated with acute coronary syndrome (ACS). BACKGROUND:Tezosentan is a dual endothelin receptor antagonist that has been shown to improve cardiac output, decrease pulmonary capillary wedge pressure, an...
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/s0735-1097(03)00194-3
更新日期:2003-05-07 00:00:00
abstract:OBJECTIVES:The purpose of this study was to determine the frequency and causes of intermittent and permanent loss of cardiac resynchronization therapy (CRT) in patients who have undergone the successful implantation of a transvenous defibrillator that delivers CRT (CRT-D). BACKGROUND:The causes of loss of CRT have not...
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/j.jacc.2004.03.054
更新日期:2004-07-07 00:00:00
abstract:OBJECTIVES:This study was conducted to explore mechanisms that could explain the possible clinical benefit of early administration of a beta 1-selective adrenoreceptor blocking agent or a bradycardiac drug as adjunct to thrombolysis in acute myocardial infarction. BACKGROUND:The effects of beta-blockers given concomit...
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(93)90044-2
更新日期:1993-08-01 00:00:00
abstract:OBJECTIVES:This study was designed to evaluate the efficacy of local versus systemic treatment of thrombosis with various antithrombotic drugs. BACKGROUND:Local use of low dose antithrombotic drugs has been proposed as being effective and safe. METHODS:Heparin (30 U/kg), an antithrombin agent (argatroban, 0.05 mg/kg ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)00324-X
更新日期:1995-11-01 00:00:00
abstract:BACKGROUND:Arterial 18fluorodeoxyglucose (FDG) positron emission tomography (PET) is considered a measure of atherosclerotic plaque macrophages and is used for quantification of disease activity in clinical trials, but the distribution profile of FDG across macrophages and other arterial cells has not been fully clarif...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2019.06.057
更新日期:2019-09-03 00:00:00
abstract:OBJECTIVES:The purpose of this study was to determine whether cilostazol reduces intimal hyperplasia in patients undergoing long zotarolimus-eluting stent implantation (stent length: ≥ 30 mm) for native long coronary lesions (length: ≥ 25 mm). BACKGROUND:Restenosis after drug-eluting stent implantation remains a signi...
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.2010.10.035
更新日期:2011-03-15 00:00:00
abstract::Among 3,548 patients undergoing a percutaneous transluminal coronary angioplasty procedure, 714 had multilesion angioplasty (1,550 lesions) in a single session. Acute occlusion occurred in 22 patients (3.1%) and 29 lesions (1.9%). The patients were classified into a group undergoing multivessel angioplasty (348 patien...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(89)90499-3
更新日期:1989-02-01 00:00:00
abstract:OBJECTIVES:This study was done to test the hypothesis that a forced diuresis with maintenance of intravascular volume after contrast exposure would reduce the rate of contrast-induced renal injury. BACKGROUND:We have previously shown a graded relationship with the degree of postprocedure renal failure and the probabil...
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(98)00574-9
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess and validate 2-dimensional (2D) strain for the detection of ischemia during dobutamine stress echocardiography (DSE). BACKGROUND:Evaluation of abnormalities of left ventricular (LV) function from wall thickening during DSE is unsatisfactory and requires a high level of ex...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2007.07.088
更新日期:2008-01-15 00:00:00