Abstract：
:Six patients referred for echocardiographic evaluation in whom an unusual echocardiographic sign resulted from air within the mediastinum or pericardium are described. Three patients had a pneumomediastinum that occurred after chest trauma and three patients had a pneumopericardium induced during a therapeutic pericardiocentesis. Important features included a broad band of echoes (air) recorded during held respiration which obscured the normal cardiac structures and dropout (gap) of echoes posteriorly. Between the cyclic appearance of the "air gap" sign, intracardiac structures were normally visualized. Echocardiographic recording of the air gap sign was identical in the six cases; it disappeared after resolution of clinical signs and symptoms of the pneumopericardium or pneumomediastinum. The pattern most likely resulted from air within the anterior mediastinum or pericardium interfering with the echographic beam and resulted in a cyclic appearance from systole to early diastole as the air was displaced by the changing cardiac size. Recognition of the air gap sign can be helpful in evaluating patients for pneumomediastinum or pneumopericardium after thoracic trauma.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Reid CL,Chandraratna AN,Kawanishi D,Bezdek WD,Schatz R,Nanna M,Rahimtoola SHdoi
10.1016/s0735-1097(83)80209-5subject
Has Abstractpub_date
1983-03-01 00:00:00pages
916-21issue
3eissn
0735-1097issn
1558-3597pii
S0735-1097(83)80209-5journal_volume
1pub_type
杂志文章abstract：:Between December 1985 and April 1990, 50 infants with a variety of congenital cardiac lesions other than the hypoplastic left heart syndrome underwent surgical relief of aortic outflow obstruction by creation of a pulmonary artery to aorta anastomosis. The patients were grouped anatomically by ventriculoarterial align...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(91)90806-k
更新日期：1991-09-01 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:This study was designed to examine the relation between the timing and adequacy of perfusion of the infarct bed and changes in ventricular size and the extent of abnormal wall motion after acute myocardial infarction. METHODS:A validated echocardiographic mapping technique was used to measure the left ventr...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(93)90101-6
更新日期：1993-03-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to identify the remodeling parameters cardiomyocyte (CM) damage or death, hypertrophy, and fibrosis that may be linked to outcomes in patients with advanced heart failure (HF) in an effort to understand the pathogenic mechanisms of HF that may support newer therapeutic modalities. ...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/j.jacc.2010.09.080
更新日期：2011-04-05 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：OBJECTIVES:The goal of this study was to evaluate the utility of a rapid "bedside" technique for measurement of B-type natriuretic peptide (BNP) in the diagnosis of congestive heart failure (CHF) in an urgent-care setting. BACKGROUND:B-type natriuretic peptide is a protein secreted from the cardiac ventricles in respo...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(00)01156-6
更新日期：2001-02-01 00:00:00
abstract：OBJECTIVES:This study was conducted to assess the need for, and use of, fenestration of an extracardiac conduit Fontan. BACKGROUND:Fenestration of a Fontan connection has been proposed as a means of improving outcomes of single ventricle palliation. The benefit of fenestration is likely to be greatest in the early pos...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(99)00228-4
更新日期：1999-08-01 00:00:00
abstract：:Many Blalock-Taussig shunts (subclavian to pulmonary artery anastomoses) have been created and a significant number are still being done. Two cases of aneurysmal degeneration of a Blalock-Taussig shunt and their management are described. Development of this rare complication may be related to large shunt flow and long...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(84)80188-6
更新日期：1984-05-01 00:00:00
abstract：OBJECTIVES:This study investigated whether ranolazine reduces dofetilide-induced torsades de pointes (TdP) in a model of long QT syndrome with down-regulated K(+) currents due to hypertrophic remodeling in the dog with chronic atrioventricular block (cAVB). BACKGROUND:Ranolazine inhibits the late Na(+) current (I(NaL)...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/j.jacc.2009.10.033
更新日期：2010-02-23 00:00:00
abstract：BACKGROUND:Vascular endothelial growth factor (VEGF)-B activates cytoprotective/antiapoptotic and minimally angiogenic mechanisms via VEGF receptors. Therefore, VEGF-B might be an ideal candidate for the treatment of dilated cardiomyopathy, which displays modest microvascular rarefaction and increased rate of apoptosis...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/j.jacc.2015.04.071
更新日期：2015-07-14 00:00:00
abstract：:Seven cases of pulmonary atresia with intact ventricular septum were detected in prenatal life. In two of these cases, there was a small hypertrophied right ventricle of the type commonly seen postnatally. In the remaining five cases, the right atrium and right ventricle were grossly dilated to a degree that caused lu...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(86)80392-8
更新日期：1986-11-01 00:00:00
abstract：OBJECTIVES:This study was designed to evaluate more closely the true in-hospital costs of elective revascularization by directional coronary atherectomy and intracoronary stenting and to compare these costs with those of the traditional revascularization alternatives (i.e., conventional balloon angioplasty and coronary...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(93)90415-w
更新日期：1993-10-01 00:00:00
abstract：:To clarify the characteristics of the frequency content of atrial signal-averaged electrocardiograms (ECGs) during sinus rhythm in patients with paroxysmal atrial fibrillation, P wave-triggered signal-averaged ECGs were recorded in 28 patients with and 34 control patients without paroxysmal atrial fibrillation. Fast F...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(10)80273-6
更新日期：1992-03-01 00:00:00
abstract：OBJECTIVES:The purpose of this review is to assemble the widely dispersed information about cardiac alternans and to categorize the types and mechanisms of alternans, their clinical manifestations and possible therapeutic implications. BACKGROUND:The phenomena of mechanical and electrical alternans have been of contin...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章,评审
doi：10.1016/0735-1097(92)90122-4
更新日期：1992-08-01 00:00:00
abstract：OBJECTIVES:This study was performed to determine whether cardiac surgery improves functional capacity in patients > 70 years of age and to identify factors associated with good and poor functional results in this age group. BACKGROUND:Cardiac surgery has been used increasingly among older patients, but the effectivene...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(94)90548-7
更新日期：1994-07-01 00:00:00
abstract：OBJECTIVES:We evaluated metallothionein (MT)-mediated cardioprotection from angiotensin II (Ang II)-induced pathologic remodeling with and without underlying diabetes. BACKGROUND:Cardiac-specific metallothionein-overexpressing transgenic (MT-TG) mice are resistant to diabetic cardiomyopathy largely because of the anti...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/j.jacc.2008.05.019
更新日期：2008-08-19 00:00:00
abstract：OBJECTIVES:The purpose of this study was to determine the effects of sodium channel blockade on anisotropic excitation propagation in the intact canine left ventricle. BACKGROUND:Anisotropic ventricular conduction- electric conductivity dependent on the myocardial fiber direction-is one of the important mechanisms of ...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(97)82543-0
更新日期：1997-06-01 00:00:00
abstract：:Heart failure (HF) data in Latin America (LA) were reviewed to guide health service planning in the prevention and treatment of HF. The HF epidemiology and the adequacy of relevant health service provision related to HF in LA are not well delineated. A systematic search of the electronic databases and the World Health...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jacc.2013.06.013
更新日期：2013-09-10 00:00:00
abstract：OBJECTIVES:We sought to determine whether reperfusion and the calcium channel blocker amlodipine or the angiotensin-converting enzyme inhibitor enalapril, during healing over six weeks after myocardial infarction (MI), limit structural vascular remodeling in the noninfarct zone (NIZ). BACKGROUND:The effect of reperfus...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(02)01805-3
更新日期：2002-05-01 00:00:00
abstract：OBJECTIVES:This study was designed to investigate the appropriateness and complications of the use of spironolactone for heart failure (HF) in clinical practice. BACKGROUND:Spironolactone was reported by one prospective randomized trial to decrease morbidity and mortality in patients with New York Heart Association (N...
journal_title：Journal of the American College of Cardiology
pub_type： 临床试验,评论,杂志文章,随机对照试验
doi：10.1016/s0735-1097(02)02694-3
更新日期：2003-01-15 00:00:00
abstract：OBJECTIVES:We sought to determine the relative influence of estimated functional capacity and thallium-201 (Tl-201) single-photon emission computed tomographic (SPECT) findings on prediction of short-term all-cause and cardiac-related mortality. BACKGROUND:Decreased functional capacity and abnormal Tl-201 SPECT findin...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(97)00217-9
更新日期：1997-09-01 00:00:00
abstract：:To determine whether two-dimensional echocardiography can identify patients with left ventricular thrombus after myocardial infarction who are prone to embolism, clinical and echocardiographic variables in 541 patients with a first infarction between 1979 and 1983 were studied prospectively. The first echocardiogram s...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(89)90592-5
更新日期：1989-03-01 00:00:00
abstract：OBJECTIVES:Percutaneous balloon valvotomy was studied retrospectively in newborns with critical pulmonary valve stenosis or atresia to assess its potential role as an alternative therapy to operation. BACKGROUND:Severe right ventricular outflow tract obstructions are life-threatening conditions requiring prostaglandin...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(95)00369-X
更新日期：1995-12-01 00:00:00
abstract：:A large number of prosthetic heart valves (PHV) are being implanted in patients with both congenital and acquired valvular disease. Many of the recipients of such valves are women of childbearing age who desire to have children. The main issues involved with pregnancy in a patient with PHV include the selection of PHV...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jacc.2005.02.087
更新日期：2005-08-02 00:00:00
abstract：OBJECTIVES:The goal of this study was to assess whether selectin blockade reduces myocardial platelet deposition and platelet-mediated injury after transient ischemia. BACKGROUND:Selectins participate in platelet adhesion to reperfused endothelium. METHODS:Thiopental-anesthetized, open-chest pigs were subjected to me...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/j.jacc.2004.09.068
更新日期：2005-01-18 00:00:00
abstract：:The role and even the existence of new myocyte formation in the adult heart remain controversial. Documentation of cell cycle regulators, deoxyribonucleic acid synthesis, and mitotic images has only in part modified the view that myocardial growth can be accomplished exclusively from hypertrophy of an irreplaceable po...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章,评审
doi：10.1016/j.jacc.2006.02.003
更新日期：2006-05-02 00:00:00
abstract：:This is a report of successful dilation of stenosis of the common trunk in a case of total anomalous pulmonary vein return into the left superior vena cava in a 3 month old infant. Percutaneous angioplasty was performed with a 6 mm diameter balloon catheter. Right ventricular systolic pressure decreased from 96 to 60 ...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/s0735-1097(85)80501-5
更新日期：1985-10-01 00:00:00
abstract：:A reasonably sensitive and specific noninvasive test for doxorubicin cardiotoxicity is needed. In addition, few data exist on the short- and long-term effects of doxorubicin on diastolic filling. To determine if pulsed Doppler indexes of diastolic filling could predict doxorubicin-induced systolic dysfunction, 26 pati...
journal_title：Journal of the American College of Cardiology
pub_type： 杂志文章
doi：10.1016/0735-1097(92)90138-d
更新日期：1992-07-01 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：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
