Abstract:
:Thirty adult patients with aortic stenosis had Doppler echocardiography within 1 day of cardiac catheterization. Noninvasive measurement of the mean transaortic pressure gradient was calculated by applying the simplified Bernoulli equation to the continuous wave Doppler transaortic velocity recording. Stroke volume was measured noninvasively by multiplying the systolic velocity integral of flow in the left ventricular outflow tract (obtained by pulsed Doppler ultrasonography) by the cross-sectional area of the left ventricular outflow tract (measured by two-dimensional echocardiography). Non-invasive measurement of aortic valve area was calculated by two methods. In method 1, the Gorlin equation was applied using Doppler-derived mean pressure gradient, cardiac output and systolic ejection period. Method 2 used the continuity equation. These noninvasive measurements were compared with invasive measurements using linear regression analysis, and mean pressure gradients correlated well (r = 0.92). Aortic valve area by either noninvasive method also correlated well with cardiac catheterization values (method 1, r = 0.87; method 2, r = 0.88). The sensitivity of Doppler detection of critical aortic stenosis was 0.86, with a specificity of 0.88 and a positive predictive value of 0.86. Cardiac output measured nonsimultaneously showed poor correlation (r = 0.51). Doppler echocardiography can distinguish critical from noncritical aortic stenosis with a high degree of accuracy. Measurement of aortic valve area aids interpretation of Doppler-derived mean pressure gradient data when the gradients are in an intermediate range (30 to 50 mm Hg).
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Teirstein P,Yeager M,Yock PG,Popp RLdoi
10.1016/s0735-1097(86)80382-5subject
Has Abstractpub_date
1986-11-01 00:00:00pages
1059-65issue
5eissn
0735-1097issn
1558-3597pii
S0735-1097(86)80382-5journal_volume
8pub_type
杂志文章abstract:OBJECTIVES:The aim of this study was to compare treadmill exercise (TEX) and dipyridamole stress on the uptake and retention of N-13 ammonia. BACKGROUND:Size and severity of stress-induced myocardial perfusion defects are clinically important. Because ammonia uptake and retention seems to be related to perfusion, viab...
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.2005.09.027
更新日期:2006-01-17 00:00:00
abstract:OBJECTIVES:This study was designed to determine the susceptibility of an implanted cardioverter-defibrillator to electromagnetic interference in an electrically hostile work site environment, with the ultimate goal of allowing the patient to return to work. BACKGROUND:Normal operation of an implanted cardioverter-defi...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(96)00147-7
更新日期:1996-08-01 00:00:00
abstract:OBJECTIVES:The purpose of this study was to evaluate the rate of recognition of atrial fibrillation (AF), use of warfarin and prevalence of cerebrovascular accident (CVA) in paced versus unpaced patients during admission to a tertiary care teaching hospital. BACKGROUND:The presence of AF underlying a continuously pace...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00794-4
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVES:We sought to test the hypothesis that C-reactive protein, a marker of inflammation, would correlate positively with coronary calcium, a marker of atherosclerosis, in postmenopausal women. BACKGROUND:High sensitivity testing for C-reactive protein (hsCRP) has recently been shown in large population studies t...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00680-x
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVES:To determine whether the benefits outlined in Background might extend to patients with multivessel disease, we examined the short- and long-term outcome of multivessel Palmaz-Schatz stenting. BACKGROUND:Percutaneous transluminal coronary angioplasty (PTCA) has become the dominant treatment for most patients...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(97)00146-0
更新日期:1997-07-01 00:00:00
abstract:BACKGROUND:Incidence and outcome of mitral valve (MV) surgery are unknown in patients with hypertrophic obstructive cardiomyopathy (HOCM) undergoing extended transaortic septal myectomy. OBJECTIVES:This study sought to define indications and suitable operative strategy for mitral regurgitation (MR) in patients with HO...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2016.07.735
更新日期:2016-10-04 00:00:00
abstract::In a 69 year old woman with a "sticking" Björk-Shiley mitral prosthesis, the diagnosis was suggested by both the two-dimensional and the Doppler ultrasound examinations. In particular, the findings of early diastolic paradoxic septal motion, intermittent delayed opening of the prosthetic disc and variable timing of th...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80443-0
更新日期:1986-10-01 00:00:00
abstract:OBJECTIVES:We sought to investigate the impact of left ventricular (LV) pacing site on mechanical response to cardiac resynchronization therapy (CRT) in patients with ischemic cardiomyopathy (ICM). BACKGROUND:CRT reduces morbidity and mortality in patients with dyssynchronous LV failure; however, variability in respon...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2010.06.014
更新日期:2010-08-31 00:00:00
abstract::Twenty-four patients with restrictive cardiomyopathy were identified at St. Thomas' Hospital during a 17-year period. All had endomyocardial biopsy, but in two patients the biopsy specimens were small and nondiagnostic. Seven patients had amyloidosis and five had other specific heart muscle diseases. The remaining 10 ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90540-p
更新日期:1991-11-01 00:00:00
abstract:OBJECTIVES:This study attempted to assess myocardial sympathetic innervation using iodine-123 (I-123) metaidobenzylguanidine (MIBG) imaging in patients with familial amyloid polyneuropathy. BACKGROUND:Signs and symptoms of cardiac autonomic dysfunction are commonly seen in patients with cardiac amyloidosis. However, t...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(96)00438-x
更新日期:1997-01-01 00:00:00
abstract::The effectiveness of an intermittent regimen of transdermal nitroglycerin in chronic stable angina was evaluated in 206 patients using serial treadmill testing. After a placebo stabilization phase, patients were randomized to 4 weeks of double-blind treatment with transdermal nitroglycerin, 10 or 20 cm2 (equivalent to...
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(89)90216-7
更新日期:1989-03-15 00:00:00
abstract:OBJECTIVES:In the Heparin in Early Patency (HEAP) pilot study a beneficial effect of high-dose heparin on early patency in acute myocardial infarction (MI) was observed in a matched-control study. BACKGROUND:High dose bolus intravenous injection of heparin may achieve lysis of coronary thrombi and could enhance early ...
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(99)00597-5
更新日期:2000-03-01 00:00:00
abstract:BACKGROUND:Prolonged heart rate-corrected QT interval on electrocardiograms (ECGs) is associated with increased risk of myocardial infarction and cardiovascular disease (CVD)-related deaths in patients with prevalent coronary heart disease. OBJECTIVES:This study sought to examine the prognostic association between the...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2014.08.039
更新日期:2014-11-18 00:00:00
abstract:OBJECTIVES:The purpose of this study was to examine the relationships among B-type natriuretic peptide (BNP) levels within the diagnostic range, perceived congestive heart failure (CHF) severity, clinical decision making, and outcomes of the CHF patients presenting to emergency department (ED). BACKGROUND:Since BNP co...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1016/j.jacc.2004.06.015
更新日期:2004-09-15 00:00:00
abstract::Thirty-one dogs underwent in vivo scanning with computed transmission tomography; 15 dogs were studied within 7 days (mean 4) after coronary occlusion, 10 dogs 21 to 25 days (mean 28) after occlusion and 6 dogs 4 days after coronary reperfusion of a 2 to 3 hour coronary ligation. Ungated scans (1 cm in depth) of the l...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,收录出版
doi:10.1016/s0735-1097(84)80440-4
更新日期:1984-01-01 00:00:00
abstract::The safety of thrombolytic therapy of acute myocardial infarction could be improved if a method were developed to dissolve fresh occlusive coronary thrombus without simultaneously dissolving hemostatic thrombi outside the coronary arteries. This study is based on the assumption that, in a patient with evolving acute m...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(89)90441-5
更新日期:1989-11-01 00:00:00
abstract::Twenty-six young pigs were infected with encephalomyocarditis virus, observed clinically, studied at intervals by noninvasive and invasive methods to assess cardiac function and eventually examined pathologically. All infected animals appeared ill, usually manifesting diminished appetite, lethargy and fever. Spontaneo...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(92)90533-s
更新日期:1992-03-15 00:00:00
abstract:OBJECTIVES:We evaluated the potential vasodilator effects of transcutaneous low-frequency ultrasound (US) in human brachial arteries. BACKGROUND:Recent data show that transthoracic low-frequency US energy results in canine coronary artery vasodilation. METHODS:Brachial artery diameters were measured before and after ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.03.046
更新日期:2006-08-01 00:00:00
abstract::To determine predictors of inducible sustained ventricular tachycardia or fibrillation by programmed electrical stimulation in patients with coronary artery disease and ventricular tachyarrhythmias, 14 clinical and angiographic variables were analyzed in 60 consecutive patients. All patients had angiographically docum...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(89)90605-0
更新日期:1989-03-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to investigate whether multiple biomarkers contribute to improved coronary heart disease (CHD) risk prediction in post-menopausal women compared with assessment using traditional risk factors (TRFs) only. BACKGROUND:The utility of newer biomarkers remains uncertain when added to pr...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2009.12.047
更新日期:2010-05-11 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:OBJECTIVES:The present study sought to determine whether myocardial contractile abnormalities accompany the development of chest pain in patients with normal coronary angiograms. BACKGROUND:The mechanism of chest pain in patients with angina despite a normal coronary arteriogram is controversial. Although previous stu...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(96)00481-0
更新日期:1997-02-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to evaluate the potential of paclitaxel to prevent restenosis in vivo. BACKGROUND:Paclitaxel (Taxol) is a microtubule-stabilizing compound with potent antitumor activity. It influences the cytoskeleton equilibrium by increasing the assembly of altered microtubules, thereby inducing ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(00)00614-8
更新日期:2000-06-01 00:00:00
abstract:OBJECTIVES:We sought to use quantitative markers of the regional left ventricular (LV) response to stress to infer whether diabetic cardiomyopathy is associated with ischemia. BACKGROUND:Diabetic cardiomyopathy has been identified in clinical and experimental studies, but its cause remains unclear. METHODS:We studied...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(03)00654-5
更新日期:2003-08-06 00:00:00
abstract::To delineate the role of plasmin inhibitors, especially the two molecular forms of alpha 2-antiplasmin (that is, the plasminogen-binding and the nonplasminogen-binding forms), in the control of systemic effects during thrombolytic therapy, the consumption of plasmin inhibitors and the degree of fibrinogen breakdown we...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(10)80003-8
更新日期:1990-05-01 00:00:00
abstract:OBJECTIVES:To examine the relationship between the persistence of ST segment depression in leads V5-V6 after Q-wave anterior wall myocardial infarction (MI) and the filling pattern of the left ventricle (LV). BACKGROUND:Precordial ST segment depression predominantly in leads V5-V6 is associated with increased in-hospi...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00577-x
更新日期:2000-02-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to examine whether restrictive right ventricular (RV) physiology (the presence of antegrade pulmonary arterial flow in late diastole) occurred in patients with moderate to severe isolated pulmonary valvular stenosis (PVS) and to estimate its prevalence and relationship to RV functio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2007.06.042
更新日期:2007-10-09 00:00:00
abstract:BACKGROUND:Diabetic medications can cause hypoglycemia, which may lead to myocardial damage. OBJECTIVES:This study sought to determine whether hypoglycemia is associated with higher levels of high-sensitivity cardiac troponin T (hsTnT). METHODS:The BARI 2D (Bypass Angioplasty Revascularization Investigation 2 Diabete...
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.2018.07.067
更新日期:2018-10-09 00:00:00
abstract:OBJECTIVES:The purpose of this study was to assess whether transradial access for ST-segment elevation acute coronary syndrome undergoing early invasive treatment is associated with better outcome compared with conventional transfemoral access. BACKGROUND:In patients with acute coronary syndrome, bleeding is a signifi...
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.2012.06.017
更新日期:2012-12-18 00:00:00
abstract::The results of recatheterization were assessed in a select group of 95 patients enrolled in the Mansfield Scientific Aortic Valvuloplasty Registry to determine whether any procedural or patient-related variables at baseline predicted either initial immediate or follow-up (6.2 +/- 3.3 months) results. At the follow-up ...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90853-2
更新日期:1991-04-01 00:00:00