Abstract：
:This study prospectively assessed the electrophysiologic effects of parenteral magnesium sulfate administration on paroxysmal atrioventricular (AV) reentrant supraventricular tachycardia and the efficacy of magnesium to terminate these arrhythmias. Eleven normomagnesemic patients, seven with orthodromic reentrant supraventricular tachycardia that used an accessory AV pathway, and four with typical AV nodal reentry were examined. All patients had a history of sustained supraventricular tachycardia requiring pharmacologic therapy or electrical cardioversion for termination of tachycardia. After baseline electrophysiologic study, including documentation of sustained supraventricular tachycardia that was reproducibly induced, parenteral magnesium sulfate (a bolus of 0.3 mEq/kg of elemental magnesium infused over a 10-minute period followed by a maintenance infusion of 0.2 mEq/kg/hr) was administered during sustained supraventricular tachycardia. The serum magnesium concentration increased from (mean +/- standard deviation) 1.9 +/- 0.2 mg/dl to 4.0 +/- 0.6 mg/dl (p = 0.0001). Except for flushing and mild diaphoresis during infusion of the magnesium sulfate bolus, and dry heaves in one patient, there were no untoward effects or significant changes in systolic blood pressure. During administration of magnesium, the tachycardia cycle length increased from 319 +/- 39 msec to 348 +/- 43 msec (p = 0.0001). Slowing of the tachycardia occurred predominantly in the antegrade limb of the circuit at the level of the AV node with the AH interval increasing from 171 +/- 66 msec to 197 +/- 68 msec (p = 0.0001), whereas there was no significant change in the HV interval (43 +/- 3 msec to 43 +/- 4 msec, p = NS) or the VA interval (106 +/- 43 msec to 110 +/- 47 msec, p = NS) during tachycardia.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Am Heart Jjournal_title
American heart journalauthors
Sager PT,Widerhorn J,Petersen R,Leon C,Ryzen E,Rude R,Rahimtoola SH,Bhandari AKdoi
10.1016/s0002-8703(05)80021-3subject
Has Abstractpub_date
1990-02-01 00:00:00pages
308-16issue
2 Pt 1eissn
0002-8703issn
1097-6744pii
S0002-8703(05)80021-3journal_volume
119pub_type
杂志文章abstract：:The effects of atrial pacing on the signal-averaged electrocardiogram were studied in 14 patients with remote myocardial infarction and a history of cardiac arrest or sustained ventricular tachycardia (group I) and in 13 patients with coronary artery disease and no history of sustained ventricular tachyarrhythmia (gro...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/s0002-8703(05)80077-8
更新日期：1990-01-01 00:00:00
abstract：BACKGROUND:The impact of valve prosthesis-patient mismatch on long-term outcome after aortic valve replacement estimated by various variables such as projected indexed effective orifice area and internal geometric orifice area obtained from in vivo or in vitro published data is still controversial. METHODS:The effecti...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/j.ahj.2007.12.037
更新日期：2008-06-01 00:00:00
abstract：BACKGROUND:Intracranial hemorrhage is an uncommon but very dangerous complication in patients receiving thrombolytic therapy for acute myocardial infarction. Neurosurgical evacuation is often an available treatment option. However, the association between neurosurgical evacuation and clinical outcomes in these patients...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0002-8703(99)70152-3
更新日期：1999-09-01 00:00:00
abstract：:The purpose of this study was to assess the recovery of the left ventricular pressure (PLV), and the incidence and type of arrhythmias after effective low-dose defibrillation (Imax = 18-70 A) in healthy hearts and in hearts with acute myocardial infarction (AMI) in the intact dog. In fifteen dogs 84 episodes of fibril...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(83)90195-3
更新日期：1983-08-01 00:00:00
abstract：:Asymptomatic atrial fibrillation (AF) is common and may have the same prognostic implications as symptomatic AF. Among patients receiving dual-chamber pacemakers, it is now possible to quantify asymptomatic AF accurately. Most of these episodes are of short duration, often lasting only seconds to minutes and are calle...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/j.ahj.2006.02.016
更新日期：2006-09-01 00:00:00
abstract：:Atrial depressurization time measurement by Doppler ultrasound can be used to quantify stenotic mitral valve area. In this report, we present the results of a blinded trial comparing the standard Doppler method for "pressure half-time" (A) and another Doppler method we devised (B) for measurement of atrial depressuriz...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/0002-8703(87)90045-7
更新日期：1987-04-01 00:00:00
abstract：:In a prospective clinical trial of 195 consecutive unselected patients with acute myocardial infarction (AMI), systematic blinded clinical and echocardiographic examinations were performed by two observers on day 5. The purpose was to define low-risk patients with regard to in-hospital and 2-month mortality and predic...
journal_title：American heart journal
pub_type： 临床试验,杂志文章
doi：10.1016/0002-8703(92)90963-v
更新日期：1992-10-01 00:00:00
abstract：BACKGROUND:The long-term fate of patent irradiated segments at 6 months after beta-radiation therapy has not been sufficiently evaluated. METHODS:Two-year follow-up angiography was performed in 52 patients with patent irradiated segments at 6 months after beta-radiation with a rhenium 188-mercaptoacetyltriglycine-fill...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/j.ahj.2005.02.011
更新日期：2006-01-01 00:00:00
abstract：:Studies on cardiac conduction disorders and pacemaker tachycardias are usually conducted in patients because the phenomenon of ventriculoatrial (retrograde) conduction resulting from ectopic beats and pacing the ventricles has only been reported in humans. This study was conducted to characterize the ventriculoatrial ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(84)90621-5
更新日期：1984-08-01 00:00:00
abstract：BACKGROUND:Patients undergoing percutaneous coronary intervention (PCI) for unstable coronary syndromes have substantial emotional and spiritual distress that may promote procedural complications. Noetic (nonpharmacologic) therapies may reduce anxiety, pain and distress, enhance the efficacy of pharmacologic agents, or...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1067/mhj.2001.119138
更新日期：2001-11-01 00:00:00
abstract：BACKGROUND:The effect of raloxifene on aortic elasticity in healthy postmenopausal women is unknown. The purpose of the present study was to examine the effect of raloxifene on aortic elasticity and cardiovascular structure and function in healthy postmenopausal women. METHODS:A randomized, crossover, double-blind, pl...
journal_title：American heart journal
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1016/j.ahj.2005.02.020
更新日期：2005-12-01 00:00:00
abstract：:Incidence of myonecrosis in patients undergoing rotational atherectomy was evaluated by preprocedural statin use. The incidence of any myonecrosis (24.1% vs 52.3%, P < .001) or significant myonecrosis (7.5% vs 21.8%, P < .001) was significantly lower among patients pretreated with statins. This difference remained sig...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/j.ahj.2006.02.026
更新日期：2006-05-01 00:00:00
abstract：:The results of percutaneous transseptal balloon mitral valvuloplasty (PTBMV) in 30 Chinese patients with rheumatic mitral stenosis are reported. PTBMV with the Inoue balloon catheter was successfully performed in 27 patients without any significant complications. The mean left atrial pressure decreased from 20.15 +/- ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(88)90061-0
更新日期：1988-05-01 00:00:00
abstract：:Transthoracic echocardiography has played a useful role in the screening of cardiac transplant donors. However, transthoracic echocardiograms may be suboptimal in many patients on ventilators. The role of transesophageal echocardiography in cardiac donor screening is unknown. Therefore we compared the potential benefi...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(93)90758-2
更新日期：1993-06-01 00:00:00
abstract：:The appearance of perivalvular cavities (PCs) in patients with infectious endocarditis (IE) was studied by transesophageal echocardiography (TEE) color Doppler examinations to determine whether the color Doppler TEE presentation was in keeping with the current concept of PCs representing abscesses. Two heart centers p...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(95)90241-4
更新日期：1995-07-01 00:00:00
abstract：:A 35-year-old man suffered transmural diaphragmatic wall infarction immediately after receiving a nonpenetrating trauma to his chest. During subsequent months crippling angina pectoris developed and coronary arteriography was performed. A complete obstruction of the left circumflex coronary artery was demonstrated 2 c...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/s0002-8703(76)80051-8
更新日期：1976-10-01 00:00:00
abstract：BACKGROUND:Perflenapent injectable emulsion is a newer echocardiographic contrast agent that provides chamber opacification and improved endocardial border delineation. In >1000 patients tested, adverse effects have been minimal. However, previous studies have included few patients with congestive heart failure (CHF) o...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,多中心研究,随机对照试验
doi：10.1067/mhj.2000.106612
更新日期：2000-06-01 00:00:00
abstract：:In 72 patients who received streptokinase within 6 hours of the onset of an acute myocardial infarction (AMI), the relationship between the presence of a previous coronary event and the severity of the residual coronary artery stenosis was studied. Fifty-five patients were either asymptomatic or had recent onset angin...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(89)90219-6
更新日期：1989-11-01 00:00:00
abstract：:To determine how early myocardial infarction can be detected, serial creatine kinase MB concentrations were sampled in 313 patients during triage of acute (less than 12 hours) chest pain. Serum was sampled on hospital arrival (baseline) and hourly for 3 hours (total of four samples). Creatine kinase MB concentrations ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(92)90646-d
更新日期：1992-02-01 00:00:00
abstract：:Programmed ventricular stimulation with a standard protocol that used up to three extrastimuli was compared prospectively with a short-to-long protocol and a two-site protocol in 77 consecutive patients undergoing electrophysiologic study in an attempt to increase the yield of ventricular tachycardia (VT) induction. T...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/0002-8703(91)90957-j
更新日期：1991-01-01 00:00:00
abstract：BACKGROUND:Patients with left ventricular dysfunction who undergo coronary artery bypass graft (CABG) surgery frequently have late sudden cardiac death. The CABG Patch Trial is a prospective, randomized, multicenter clinical trial that randomized patients at high risk at the completion of CABG surgery to implantation o...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0002-8703(97)80001-4
更新日期：1997-11-01 00:00:00
abstract：BACKGROUND:In China, low socioeconomic status (SES) may be a barrier for patients with coronary heart disease (CHD) to receive adequate treatment because of their inadequate access to health resources. This study aims to evaluate whether and to what extent SES is associated with the treatment of CHD patients. METHODS:...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/j.ahj.2008.12.009
更新日期：2009-04-01 00:00:00
abstract：:The results of percutaneous transluminal coronary angioplasty (PTCA) in 307 lesions in 235 patients within 60 days of myocardial infarction (MI) were compared with the PTCA results in 591 lesions in 489 patients without recent MI, and the effect of fibrinolysis to treat recurring occlusive clot during angioplasty was ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(90)90065-6
更新日期：1990-08-01 00:00:00
abstract：:A double-blind multicenter study compared oral acebutolol (n = 182) with hydrochlorothiazide (n = 178) in the treatment of mild to moderate essential hypertension (diastolic blood pressure 95 to 114 mm Hg). Both agents produced significant and comparable reductions in systolic, diastolic, and mean arterial blood press...
journal_title：American heart journal
pub_type： 临床试验,杂志文章
doi：10.1016/0002-8703(86)90153-5
更新日期：1986-02-01 00:00:00
abstract：:The records of 64 patients with progressive systemic sclerosis (PSS) were reviewed. More than 100 items from the patient's history, physical examination, and laboratory tests were encoded. A two-tailed Gehan's test was used to evaluate the effect of each variable on patient survival. Variables significant at the 0.05 ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/0002-8703(85)90525-3
更新日期：1985-07-01 00:00:00
abstract：BACKGROUND:Physician adherence to guidelines is often poor, but the reasons have not been completely studied. We investigated whether physician adherence to guidelines for percutaneous transluminal coronary angioplasty (PTCA) and coronary artery bypass grafting (CABG) varied by source, development methods, or the exten...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1067/mhj.2003.35
更新日期：2003-01-01 00:00:00
abstract：BACKGROUND:Enhanced external counterpulsation (EECP) reduces angina and extends time to exercise-induced ischemia in patients with symptomatic coronary disease. One- and two-center studies and a retrospective case series reported that EECP improves myocardial perfusion in stable angina pectoris. We sought to critically...
journal_title：American heart journal
pub_type： 杂志文章,多中心研究
doi：10.1016/j.ahj.2005.01.054
更新日期：2005-11-01 00:00:00
abstract：:Fifteen patients who arrived between 6 and 24 hours after the onset of acute myocardial infarction and who were found to have totally occluded coronary arteries, received aspirin, heparin, and tissue plasminogen activator given over 3 hours. Eight patients were randomly assigned to receive intravenous prostaglandin E1...
journal_title：American heart journal
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/0002-8703(94)90539-8
更新日期：1994-04-01 00:00:00
abstract：BACKGROUND:Chronic infection with Chlamydia pneumoniae (Cpn) has been associated with atherosclerotic cardiovascular disease in sero-epidemiological, pathological and animal-model studies. Inflammation and immune activation has been proposed as the pathophysiological link between chronic infection and atherosclerosis. ...
journal_title：American heart journal
pub_type： 杂志文章
doi：10.1016/S0002-8703(03)00101-7
更新日期：2003-07-01 00:00:00
abstract：:dal-PLAQUE is a placebo-controlled multicenter study designed to assess the effect of dalcetrapib on imaging measures of plaque inflammation and plaque burden. dal-PLAQUE is a multimodality imaging study in the context of the large dal-HEART Program. Decreased high-density lipoprotein cholesterol is linked to increase...
journal_title：American heart journal
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1016/j.ahj.2011.05.006
更新日期：2011-08-01 00:00:00
