Abstract:
:Cardiac tamponade has been associated with an abnormally increased respiratory variation in transvalvular blood flow velocities. To determine whether this finding is consistently present in cardiac tamponade, seven patients were studied prospectively with Doppler echocardiography before and after pericardiocentesis and the results were compared with those found in 20 normal adults and 14 asymptomatic patients with pericardial effusion who did not have definite clinical evidence of tamponade. Doppler ultrasound evaluation included measurement of mitral, tricuspid, aortic, pulmonary and central venous flow velocities, as well as left ventricular ejection and isovolumic relaxation times during inspiration, expiration and apnea. In the patients with severe cardiac tamponade, respiratory variation in transvalvular flow velocities and left ventricular ejection and isovolumic relaxation times were markedly increased compared with values in normal subjects and those obtained after pericardiocentesis. In the 14 asymptomatic patients with pericardial effusion but without overt tamponade, 7 showed respiratory variation in flow velocity similar to that of normal subjects. The other seven patients demonstrated increased respiratory change compared with normal, but less than that in the patients with tamponade. Clinical and hemodynamic data in this latter group suggest that these patients may represent an intermediate stage of pericardial effusion with an element of hemodynamic compromise.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Appleton CP,Hatle LK,Popp RLdoi
10.1016/s0735-1097(98)90060-2subject
Has Abstractpub_date
1988-05-01 00:00:00pages
1020-30issue
5eissn
0735-1097issn
1558-3597pii
S0735-1097(98)90060-2journal_volume
11pub_type
杂志文章,评审abstract::Oxidative stress occurs whenever the release of reactive oxygen species (ROS) exceeds endogenous antioxidant capacity. In this paper, we review the specific role of several cardiovascular risk factors in promoting oxidative stress: diabetes, obesity, smoking, and excessive pollution. Specifically, the risk of developi...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2017.05.043
更新日期:2017-07-11 00:00:00
abstract::The relation between left ventricular diastolic abnormalities and myocardial blood flow during ischemia was studied in eight open chest dogs with critical stenoses of the proximal left anterior descending and circumflex coronary arteries. The heart was paced at 1.7 times the heart rate at rest for 3 min. In dogs with ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(10)80198-6
更新日期:1991-03-01 00:00:00
abstract:OBJECTIVES:We examined whether activated protein C (APC) is an effective conjunctive therapy to thrombolysis in patients with ST-segment-elevated acute myocardial infarction (AMl). BACKGROUND:Activated protein C possesses both systemic anticoagulant and anti-inflammatory properties. It has been also shown to enhance f...
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)01059-3
更新日期:2003-10-15 00:00:00
abstract:OBJECTIVES:We compared left ventricular (LV) systolic and diastolic function during right ventricular (RV), LV, and biventricular (BiV) pacing in patients with narrow QRS duration with and without LV dysfunction. BACKGROUND:The optimal RV pacing lead location for patients with a standard indication for ventricular pac...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.04.099
更新日期:2006-10-17 00:00:00
abstract::Pulsed Doppler echocardiography was used to determine prospectively the prevalence of mitral, aortic, tricuspid and pulmonary regurgitation in 80 consecutive patients with mitral valve prolapse and 85 normal subjects with similar age and sex distribution. Mitral valve prolapse was defined by posterior systolic displac...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80308-4
更新日期:1986-12-01 00:00:00
abstract:OBJECTIVES:To test the hypothesis that when activation of Bachmann's bundle (BB) is critical to the unstable reentrant circuits that maintain atrial fibrillation (AF) in the sterile pericarditis canine model, a lesion in BB would prevent induction of stable AF. BACKGROUND:One mechanism of induced AF in this model is m...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00803-2
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to assess the prognostic significance of preinfarction angina after a first Q wave myocardial infarction. Patients with anterior or inferior myocardial infarction were compared. BACKGROUND:The effect of preinfarction angina on prognosis after anterior and inferior myocardial in...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)80002-x
更新日期:1995-08-01 00:00:00
abstract::To determine the effects of dopamine-1 agonist therapy in severe hypertension, blood pressure, heart rate, catecholamines and left ventricular function were studied in 18 patients (10 with renal disease) with diastolic blood pressure greater than 120 mm Hg (range 124 to 160) after intravenous fenoldopam therapy. Const...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)90073-0
更新日期:1988-05-01 00:00:00
abstract::Nuclear magnetic resonance (NMR) imaging has been shown to accurately portray cardiac anatomy and function. To investigate the potential of NMR imaging for the assessment of coronary stenosis in patients with chest pain, ultrafast NMR imaging in conjunction with a T1 (longitudinal relaxation time) contrast agent was p...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90754-w
更新日期:1991-10-01 00:00:00
abstract:OBJECTIVES:This study was designed to assess the risk of significant bleeding complications in patients receiving antiplatelet or anticoagulation medications at the time of implantable cardioverter-defibrillator (ICD) device implantation. BACKGROUND:Periprocedural management of antiplatelet or anticoagulation therapy ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.12.056
更新日期:2010-05-25 00:00:00
abstract::Before the advent of the microelectrode, His bundle recording and direct cardiac pacing, electrocardiographic interpretation of arrhythmias in human beings was based on presumed mechanisms derived by deductive analysis. This indirect approach was forced by the fact that the surface electrocardiogram does not directly ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80031-x
更新日期:1983-01-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to evaluate the safety of implanting a cardiac resynchronization therapy (CRT) system. BACKGROUND:Clinicians and patients require data on the safety of the CRT implant procedure to estimate procedural risk. METHODS:We evaluated outcomes of transvenous CRT system implantation i...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2005.08.031
更新日期:2005-12-20 00:00:00
abstract:BACKGROUND:The risk-benefit ratio of left atrial appendage closure (LAAC) versus systemic therapy (warfarin) for prevention of stroke, systemic embolism, and cardiovascular death in nonvalvular atrial fibrillation (NVAF) requires continued evaluation. OBJECTIVES:This study sought to assess composite data regarding lef...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,meta分析
doi:10.1016/j.jacc.2015.04.025
更新日期:2015-06-23 00:00:00
abstract::Arginine vasopressin, a potent vasoconstrictor and regulator of body water, is frequently increased in the plasma of patients with congestive heart failure. Other neurohumoral control networks, such as the sympathetic nervous system and the renin-angiotensin system, also demonstrate increased activity in congestive he...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80333-7
更新日期:1983-12-01 00:00:00
abstract::In the recent era, no congenital heart defect has undergone a more dramatic change in diagnostic approach, management, and outcomes than hypoplastic left heart syndrome (HLHS). During this time, survival to the age of 5 years (including Fontan) has ranged from 50% to 69%, but current expectations are that 70% of newbo...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2011.09.022
更新日期:2012-01-03 00:00:00
abstract:OBJECTIVES:In this study, we assessed the utility of exercise thallium-201 scintigraphy and other clinical factors in predicting perioperative cardiac complications in patients undergoing elective vascular surgery. BACKGROUND:The risk of cardiac complications among such patients is very high. METHODS:The study group ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90307-m
更新日期:1993-05-01 00:00:00
abstract:OBJECTIVES:We investigated whether the serum markers of collagen turnover differed in various forms of atrial fibrillation (AF) and in sinus rhythm (SR) in humans. BACKGROUND:Structural alterations and fibrosis have been implicated in the generation and perpetuation of AF. METHODS:Serum C-terminal propeptide of colla...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2008.03.045
更新日期:2008-07-15 00:00:00
abstract::Knowledge of the pathobiology of pulmonary hypertension (PH) continues to accelerate. However, fundamental gaps remain in our understanding of the underlying pathological changes in pulmonary arteries and veins in the different forms of this syndrome. Although PH primarily affects the arteries, venous disease is incre...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2013.10.025
更新日期:2013-12-24 00:00:00
abstract:OBJECTIVES:The purpose of this study was to assess the effect of different degrees of ischemia on circulating and cardiac neurohormones and vasotone. BACKGROUND:Neuroendocrine activation and subsequent systemic vasoconstriction may complicate ischemia. Whether this relates to severity of ischemia and subsequent cardia...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(94)90505-3
更新日期:1994-01-01 00:00:00
abstract:OBJECTIVE:The objective of this study is to evaluate the one-year outcome of the first 50 patients who underwent nonsurgical septal reduction for symptomatic hypertrophic obstructive cardiomyopathy at our institution. BACKGROUND:Left ventricular outflow tract obstruction is an important determinant of clinical symptom...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/s0735-1097(00)00767-1
更新日期:2000-09-01 00:00:00
abstract:BACKGROUND:A high percentage of biventricular pacing is required for optimal outcome in patients treated with cardiac resynchronization therapy (CRT), but the influence of ectopic beats on the success of biventricular pacing has not been well established. OBJECTIVES:This study sought to determine if increased ectopic ...
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.2014.06.1177
更新日期:2014-09-09 00:00:00
abstract:OBJECTIVES:The aim of this study was to assess the utility of tissue Doppler echocardiography in the setting of repaired transposition of the great arteries when the right ventricle (RV) functions as the systemic ventricle. BACKGROUND:Myocardial acceleration during isovolumic contraction, "isovolumic myocardial accele...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2003.06.018
更新日期:2004-01-07 00:00:00
abstract:OBJECTIVES:This study investigated the effect of a very long-term exercise training program is not known in chronic heart failure (CHF) patients. BACKGROUND:We previously showed that long-term moderate exercise training (ET) improves functional capacity and quality of life in New York Heart Association class II and II...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.jacc.2012.06.036
更新日期:2012-10-16 00:00:00
abstract:OBJECTIVES:This study was performed to describe the initial experience and follow-up of ultrasound-guided compression of pseudoaneurysms in patients receiving systemic anticoagulant or antiplatelet therapy, or both, after recent cardiac catheterization or percutaneous transluminal coronary angioplasty. BACKGROUND:Femo...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(92)90015-f
更新日期:1992-09-01 00:00:00
abstract:OBJECTIVES:This study sought to assess the prognostic impact of midregional pro-adrenomedullin (MR-proADM) after an acute myocardial infarction (AMI). BACKGROUND:Adrenomedullin (ADM) is elevated in heart failure (HF) and after AMI. Another part of its precursor, MR-proADM, is more stable in circulation and ex vivo. We...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.12.038
更新日期:2007-04-10 00:00:00
abstract:OBJECTIVES:We describe a new stepwise anatomically and electrogram-guided strategy for radiofrequency catheter ablation of the fast pathway. BACKGROUND:Anatomically and electrogram-guided approaches have been developed for slow pathway ablation in patients with atrioventricular (AV) node reentrant tachycardia; however...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(94)00509-o
更新日期:1995-04-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to investigate whether the "warm-up" effect in angina protects against ischemic left ventricular (LV) dysfunction. BACKGROUND:After exercise, patients with coronary disease demonstrate persistent myocardial dysfunction, which may represent stunning, as well as warm-up protection a...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)01182-7
更新日期:2001-03-01 00:00:00
abstract::Thirty patients with stable exertional angina undergoing percutaneous transluminal coronary angioplasty of an isolated obstructive lesion of the proximal left anterior descending artery were prospectively evaluated to investigate the relation between angina induced by balloon inflation and the quantity and severity of...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(87)80189-4
更新日期:1987-09-01 00:00:00
abstract:OBJECTIVES:This study sought to investigate whether right atrial pressure could be used to estimate pericardial pressure during positive end-expiratory pressure (PEEP). BACKGROUND:Because of elevated intrathoracic pressure during PEEP, pulmonary capillary wedge pressure may not accurately reflect left ventricular prel...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/0735-1097(95)00420-3
更新日期:1996-01-01 00:00:00
abstract::Pulmonary artery pressure was noninvasively estimated by three Doppler echocardiographic methods in 50 consecutive patients undergoing cardiac catheterization. First, a systolic transtricuspid gradient was calculated from Doppler-detected tricuspid regurgitation; clinical jugular venous pressure or a fixed value of 14...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(87)80047-5
更新日期:1987-03-01 00:00:00