Abstract:
:Pulsed Doppler echocardiographic studies of both right and left ventricular diastolic inflow patterns were performed in 10 full-term newborn infants and serially during the first month of life in 21 premature (28 to 35 weeks' gestation) infants with no clinical cardiorespiratory disease. Results of studies performed during the first 10 days of life showed no significant difference in transmitral flow velocity or velocity-time integral measurements between full-term and preterm neonates. Values for transtricuspid velocity measurements were slightly lower in preterm infants, but E/A velocity ratio and relative contribution of E and A components to the total velocity-time integral were unchanged. Within the group of preterm infants gestational age did not affect any of the diastolic flow parameters. As preterm infants aged velocity of flow increased, but no changes were noted in the relative contributions of rapid ventricular filling and atrial contraction, either in terms of velocity of flow-velocity integral measurements. Doppler assessment of diastolic ventricular filling can provide an accessible method for serial evaluation of preterm infants. Values noted in "normal" premature infants resemble those found in full-term infants.
journal_name
Am Heart Jjournal_title
American heart journalauthors
Johnson GL,Moffett CB,Noonan JAdoi
10.1016/0002-8703(88)90745-4subject
Has Abstractpub_date
1988-12-01 00:00:00pages
1568-74issue
6 Pt 1eissn
0002-8703issn
1097-6744pii
0002-8703(88)90745-4journal_volume
116pub_type
杂志文章abstract:BACKGROUND:Coronary artery disease (CAD) and, increasingly, diabetes are recognized as having an inflammatory basis. Membrane toll-like receptors (TLRs) activate signaling pathways that up-regulate inflammation. We evaluated whether the Asp299Gly polymorphism in the TLR4 gene, which impairs inflammatory responses, is a...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2004.05.049
更新日期:2004-12-01 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::The acute hemodynamic and electrophysiologic effects of flecainide in tachycardia-induced ventricular dysfunction were investigated using an animal model. Seven swine were initially (CON) evaluated by echocardiography and then by right heart catheterization and provocative electrical ventricular stimulation both befor...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(91)90018-d
更新日期:1991-06-01 00:00:00
abstract:BACKGROUND:The optimal hydration strategy for prevention of contrast-induced acute kidney injury (AKI) remains unknown. The purpose of this meta-analysis is to compare the effectiveness of normal saline (NS) versus sodium bicarbonate hydration (NaHCO(3)) for prevention of contrast-induced AKI. METHODS:We performed a m...
journal_title:American heart journal
pub_type: 杂志文章,meta分析
doi:10.1016/j.ahj.2008.05.014
更新日期:2008-09-01 00:00:00
abstract::The effects of 20 variables that might influence postmyocardial infarction prognosis were assessed retrospectively in 139 patients followed up for an average of 11 months after discharge from San Francisco General Hospital following an acute myocardial infarction. When these variables were analyzed with the use of mul...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(85)90501-0
更新日期:1985-07-01 00:00:00
abstract:BACKGROUND:Current guidelines (American College of Cardiology/American Heart Association) for percutaneous coronary intervention (PCI) limit the performance of elective cases to hospitals with the capability for cardiac surgery. The number of hospitals in the United States with this capability is limited, which restric...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2004.03.040
更新日期:2004-10-01 00:00:00
abstract::A new integrated method for quantitating temporal and spatial systolic wall motion heterogeneity was developed and applied in 15 normal subjects and 26 patients with previous myocardial infarction (MI). After frame by frame digitizing, right anterior oblique left cineventriculograms (LV) were analyzed with 90 spaced r...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(86)90465-5
更新日期:1986-10-01 00:00:00
abstract:BACKGROUND:Accurate, reproducible, noninvasive determination of left ventricular (LV) volumes and ejection fraction (EF) is important for clinical assessment, risk stratification, selection of therapy, and serial monitoring of patients with cardiovascular disease. Three-dimensional echocardiography (3DE) approaches hav...
journal_title:American heart journal
pub_type: 临床试验,杂志文章
doi:10.1067/mhj.2000.108513
更新日期:2000-09-01 00:00:00
abstract::Three kinds of torso surface isopotential maps (measured, simulated, and difference maps) were delineated at every 1.5 (or 3) msec. during the QRS duration from the 85 unipolar lead ECG's led from the surface of a cylindrical torso model filled with perfusate and containing a canine heart undergoing Langendorff's perf...
journal_title:American heart journal
pub_type: 杂志文章
doi:
更新日期:1976-08-01 00:00:00
abstract::Selective inhibition of sinus node function offers the possibility to decrease heart rate and reduce myocardial oxygen consumption in patients with impaired cardiac function, if myocardial contractility is not further attenuated. To study the influence of a specific sinus node inhibitor on myocardial function, alinidi...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/s0002-8703(05)80185-1
更新日期:1990-06-01 00:00:00
abstract:BACKGROUND:In adults with an atrial septal defect (ASD) transcatheter closure leads to an improvement of peak oxygen uptake (VO2), but the kinetics of recovery of VO2 after maximal exercise in this patient population and the impact of transcatheter ASD closure have never been investigated. METHODS:Twenty consecutive p...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2003.11.013
更新日期:2004-05-01 00:00:00
abstract:BACKGROUND:Childhood cancer survivors are at increased risk of cardiovascular disease (CVD), which may be associated with traditional CVD risk factors. We used CVD risk aggregation instruments to describe survivor cardiometabolic health and compared their results with sibling controls. METHODS:Traditional CVD risk fac...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2011.11.008
更新日期:2012-02-01 00:00:00
abstract::The prevention of major bleeding during percutaneous coronary intervention is one of the most widely discussed and often controversial topics within interventional cardiology. The choice of arterial access should be considered a mechanism for bleeding avoidance, and various strategies have been proposed to prevent or ...
journal_title:American heart journal
pub_type: 杂志文章,评审
doi:10.1016/j.ahj.2015.04.023
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND:Our purpose was to study the effects of atrial natriuretic peptide (ANP) on cardiorenal functions when it is used to manage patients with heart failure who are receiving an angiotensin-converting enzyme inhibitor (ACEi) or in acute saline solution loading. METHODS:Seventeen patients with mild to moderate he...
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.2001.112782
更新日期:2001-03-01 00:00:00
abstract:BACKGROUND:Although the use of clopidogrel in patients "unlikely" to require coronary artery bypass grafting (CABG) is recommended in current guidelines of acute coronary syndrome (ACS) management, an important minority of patients require CABG. We assessed the ability to predict need for CABG from demographics known a...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2007.12.002
更新日期:2008-05-01 00:00:00
abstract::Frequency-domain analysis of heart rate variability (HRV) appears to distinguish sympathetic and parasympathetic modulation of heart rate. The effects of acute reflex, as opposed to tonically augmented, cardiac vagal tone on HRV are not clearly defined. Power spectral components of HRV were measured in 36 patients und...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(95)90143-4
更新日期:1995-12-01 00:00:00
abstract:BACKGROUND:Prescribing rate control medications with or without antiarrhythmic drugs is often the first course treatment for atrial fibrillation (AF). Clinical trial data suggest that antiarrhythmic drugs are only marginally effective and have multiple drawbacks, whereas rate control alone is sufficient for most patien...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2014.03.024
更新日期:2014-07-01 00:00:00
abstract::Complex coronary morphologic abnormalities with thrombus and ulceration have been recognized in acute ischemic syndromes by angiography, angioscopy, and autopsy. However, in vivo histopathologic correlates of unstable ischemic syndromes have not been described. The purpose of this study was to characterize intracorona...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(94)90612-2
更新日期:1994-09-01 00:00:00
abstract::We compared the effects of IV digoxin (0.04 mg/kg) and nitroprusside (NP) (1.2 and 1.8 microgram/kg/min) on left ventricular (LV) performance in six preinstrumented conscious dogs with 3 and 6 hours after digoxin administration (serum level, 3.5 +/- 0.6 ng/ml), there were no changes in heart rate, LV systolic (LVSP) a...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(82)90335-0
更新日期:1982-04-01 00:00:00
abstract:BACKGROUND:Low-molecular weight heparins have different pharmacokinetic and pharmacodynamic characteristics and may vary in efficacy. We compared the efficacy of enoxaparin with that of tinzaparin in the management of non-ST-segment elevation acute coronary syndromes (NSTACS). METHODS:A total of 438 patients with NSTA...
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(03)00179-0
更新日期:2003-08-01 00:00:00
abstract::A pilot study was performed to determine the safety and efficacy of coronary pulsed mid-infra-red laser angioplasty. The laser was coupled with a novel 2.0 mm multifiber catheter consisting of 37 optical fibers of 150 microns each arranged concentrically around a 0.018-inch central lumen and a soft leading tapered dis...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(91)91015-f
更新日期:1991-08-01 00:00:00
abstract:BACKGROUND:Physical activity and symptom questionnaires have been used as surrogates for exercise testing to estimate a patient's functional capacity and to individualize an exercise testing protocol in accordance with exercise testing guidelines. To validate these approaches, they must be compared with measured oxygen...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1067/mhj.2001.118740
更新日期:2001-12-01 00:00:00
abstract:BACKGROUND:Familial hypertrophic cardiomyopathy (HCM) is a clinically and genetically heterogeneous disease of the sarcomere. Molecular genetic studies have shown that familial HCM involves mutations in 8 different genes that encode proteins of the myofibrillar apparatus. METHODS:We thoroughly searched these genes to ...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1067/mhj.2001.112487
更新日期:2001-02-01 00:00:00
abstract::The aim of this study was to investigate whether platelet-activating factor (PAF), PAF receptors, and PAF receptor-mediated effects in the human myocardium play a role in cardiac depression during anaphylaxis or septic shock. The effects of PAF, the biologically inactive derivative lyso-PAF, and the specific PAF antag...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(92)90593-k
更新日期:1992-08-01 00:00:00
abstract::The purpose of this study was to investigate the effects of various doses of adenosine administered intravenously on myocardial reperfusion injury in a model with poor collateral blood flow. New Zealand White rabbits were subjected to 30 minutes of occlusion of the obtuse marginal branch of the left circumflex artery ...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(91)90567-2
更新日期:1991-11-01 00:00:00
abstract::To evaluate the stability of precordial ST-segment mapping techniques in assessing ischemic myocardial injury, we studied 28 patients with acute anterior myocardial infarction using a 49-lead electrocardiographic system (1 mV. = 10 mm.). The sum of ST elevations in millimeters was taken as an index of ischemic injury,...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/s0002-8703(77)80011-2
更新日期:1977-05-01 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::Infections related to cardiac surgery increase morbidity and mortality, and increase cost and use of health resources. With the widespread use of synthetic materials, whether in prosthetic valves or vascular conduits, bacterial infection and, more rarely, fungal complications can be devastating, requiring prolonged an...
journal_title:American heart journal
pub_type: 评论
doi:10.1016/j.ahj.2003.08.016
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:Anemia in heart failure is both common and associated with worse symptoms and increased mortality. Several small randomized controlled trials (RCTs) have assessed erythropoiesis-stimulating agents (ESAs), but definitive evaluation and clinical guidance are required. We sought to systematically review the eff...
journal_title:American heart journal
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ahj.2011.02.013
更新日期:2011-05-01 00:00:00
abstract::The clinical usefulness of cardiac imaging modalities that rely upon the detection of perfusion defects and wall motion disturbances requires conditions that provoke a heterogeneity of coronary flow and a myocardial oxygen imbalance, respectively. Traditionally, this has been achieved by exercise stress testing. Many ...
journal_title:American heart journal
pub_type: 杂志文章,评审
doi:10.1016/0002-8703(92)90614-2
更新日期:1992-08-01 00:00:00