Abstract:
:The ventricular rate and percent of pre-excited QRS complexes during atrial fibrillation were compared in two groups of patients with the Wolff-Parkinson-White syndrome. Group A consisted of 22 patients whose anterograde effective refractory period of the accessory pathway was longer than that of the atrioventricular (AV) node. Group B consisted of 23 patients in whom this relation was reversed. No patient had organic heart disease. Both groups had a similar effective refractory period of the accessory pathway (288 +/- 37 vs. 280 +/- 26 ms), whereas that of the AV node was shorter in group A than group B (242 +/- 25 vs. 285 +/- 27 ms, p = 0.0001). Patients in group A had a lower percent of pre-excited QRS complexes during atrial fibrillation (39 +/- 43% vs. 93 +/- 20%, p = 0.0001). In the 21 patients whose refractory period was measured, the difference was plotted against the percent of pre-excited QRS complexes; there was a significant correlation between the two (r = -0.83, p less than 0.001). In patients in whom pre-excited RR intervals were present, the pre-excited RR intervals were compared between the two groups. Both groups had similar effective refractory periods of the accessory pathway (265 +/- 22 vs. 280 +/- 27 ms) and ventricle (200 +/- 17 vs. 211 +/- 26 ms). The effective refractory period of the AV node was shorter in group A (248 +/- 22 vs. 285 +/- 28 ms, p = 0.0005). The shortest pre-excited RR interval did not show any difference (244 +/- 37 vs. 265 +/- 41 ms). However, both the average (328 +/- 39 vs. 397 +/- 56 ms, p = 0.001) and longest (495 +/- 109 vs. 666 +/- 205 ms, p = 0.02) pre-excited RR intervals were shorter in group A.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Fujimura O,Kuo CS,Smith BAdoi
10.1016/0735-1097(91)90510-gsubject
Has Abstractpub_date
1991-12-01 00:00:00pages
1722-6issue
7eissn
0735-1097issn
1558-3597pii
0735-1097(91)90510-Gjournal_volume
18pub_type
杂志文章abstract::An echocardiographic Doppler study in a patient with pulsus paradoxus of respiratory origin demonstrated a large inspiratory increase of tricuspid flow velocity and a corresponding decrease of mitral flow velocity. This "flow paradoxus" is therefore not specific for cardiac tamponade, and provides evidence that decrea...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80205-4
更新日期:1986-09-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to compare outcomes after transfemoral transcatheter aortic valve implantation with the Medtronic CoreValve (MCV) versus the Edwards SAPIEN/SAPIEN XT transcatheter heart valve (ESV) for severe aortic stenosis. BACKGROUND:No large matched comparison study has been conducted so far e...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jacc.2012.11.050
更新日期:2013-02-26 00:00:00
abstract:OBJECTIVES:This study sought to evaluate long-term in vivo functionality, host cell repopulation, and remodeling of "off-the-shelf" tissue engineered transcatheter homologous heart valves. BACKGROUND:Transcatheter valve implantation has emerged as a valid alternative to conventional surgery, in particular for elderly ...
journal_title:Journal of the American College of Cardiology
pub_type: 评论,杂志文章
doi:10.1016/j.jacc.2013.09.082
更新日期:2014-04-08 00:00:00
abstract:BACKGROUND:The risk of sudden cardiac death (SCD) is high early after myocardial infarction (MI). Current knowledge and guidelines mainly rely on results from older clinical trials and registry studies. Left ventricular ejection fraction (LVEF) alone has not been proven a reliable predictor of SCD. OBJECTIVES:This stu...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2020.10.033
更新日期:2020-12-22 00:00:00
abstract:OBJECTIVES:We investigated the influence of lipoprotein(a) [Lp(a)] serum levels on different endothelium-dependent vasodilator stimuli representing different mechanisms of endothelium-dependent vasodilation. BACKGROUND:Lp(a) is an independent predictor for the development and progression of coronary artery disease. Im...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(97)00237-4
更新日期:1997-10-01 00:00:00
abstract:OBJECTIVES:We sought to determine the predictive ability of total white blood cell (WBC) count and its subtypes for risk of death or myocardial infarction (MI). BACKGROUND:An elevated WBC count has been associated with cardiovascular risk, but which leukocyte subtypes carry this risk is uncertain. METHODS:Consecutive...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2005.02.054
更新日期:2005-05-17 00:00:00
abstract:OBJECTIVES:The study explored the potential for tissue swelling and venous occlusion during radiofrequency (RF) catheter ablation procedures using intracardiac echocardiography (ICE). BACKGROUND:Transient superior vena cava occlusion has been reported following catheter ablation procedures for inappropriate sinus tach...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00047-9
更新日期:1999-05-01 00:00:00
abstract::A definite diagnosis of anterior myocardial infarction is often difficult to make in patients when a pattern of poor R wave progression in the precordial leads is present on the electrocardiogram. The purpose of this study was to determine whether a mathematical model could be devised to identify patients with anterio...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(83)80332-5
更新日期:1983-12-01 00:00:00
abstract:OBJECTIVES:This study was undertaken to assess the hematologic, clinical, and biochemical response to intravenous iron in patients with chronic heart failure (CHF) and anemia. BACKGROUND:Anemia is common in patients with CHF and is associated with higher morbidity and mortality. The combination of erythropoietin (EPO)...
journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.jacc.2006.07.015
更新日期:2006-09-19 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: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:OBJECTIVES:The purpose of this study was to determine whether pulmonary artery responses to acetylcholine are abnormal in patients with chronic heart failure. BACKGROUND:Defective pulmonary artery endothelium-dependent responses have been observed in chronic heart failure models in animals. However, pulmonary artery e...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90552-c
更新日期:1993-11-01 00:00:00
abstract::Plasma and myocardial tissue concentrations of metoprolol were studied in ischemic and nonischemic areas of 22 pigs after 90 (n = 19) and 16 (n = 3) min of left anterior descending coronary artery occlusion. Group A (n = 6) received simultaneous intravenous metoprolol (0.2 mg/kg body weight) and tritium-labeled (3H)-m...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(91)90620-o
更新日期:1991-08-01 00:00:00
abstract::Fifty patients with anteroapical left ventricular aneurysm secondary to prior myocardial infarction underwent aneurysmectomy, at which time endocardial sinus rhythm mapping was performed. Forty patients had a history of recurrent sustained monomorphic ventricular tachycardia, and 10 had an aneurysm but no history of s...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(88)90409-3
更新日期:1988-08-01 00:00:00
abstract:OBJECTIVES:The aim of the present study was to investigate dynamic changes in the mitral regurgitant orifice using electromagnetic flow probes and flowmeters and the color Doppler flow convergence method. BACKGROUND:Methods for determining mitral regurgitant orifice areas have been described using flow convergence ima...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(95)80033-d
更新日期:1995-08-01 00:00:00
abstract::Intraaortic balloon counterpulsation was instituted in two adult patients whose condition was rapidly deteriorating because of critical decompensated valvular aortic stenosis. The acute hemodynamic effect of counterpulsation in these patients was compared with the effect of counterpulsation in three control patients w...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(85)80399-5
更新日期:1985-03-01 00:00:00
abstract:OBJECTIVES:We investigated whether statin therapy could be beneficial in patients with acute myocardial infarction (AMI) who have baseline low-density lipoprotein cholesterol (LDL-C) levels below 70 mg/dl. BACKGROUND:Intensive lipid-lowering therapy with a target LDL-C value <70 mg/dl is recommended in patients with v...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jacc.2011.05.057
更新日期:2011-10-11 00:00:00
abstract:BACKGROUND:It is unclear whether the overall effectiveness and safety of direct oral anticoagulants (DOACs) are consistent in patients with nonvalvular atrial fibrillation (AF) and extremely low body weight (<50 kg). OBJECTIVES:This study compared DOACs with warfarin in AF patients with low body weight. METHODS:Using...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.jacc.2018.11.051
更新日期:2019-03-05 00:00:00
abstract:OBJECTIVES:To elucidate signal transduction pathways regulating expression of myocardial gap junction channel proteins (connexins) and to determine whether mediators of cardiac hypertrophy might promote remodeling of gap junctions, we characterized the effects of angiotensin II on expression of the major cardiac gap ju...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(98)00317-9
更新日期:1998-09-01 00:00:00
abstract::The severity of aortic stenosis was evaluated by Doppler echocardiography in 48 adults (mean age 67 years) undergoing cardiac catheterization. Maximal Doppler systolic gradient correlated with peak to peak pressure gradient (r = 0.79, y = 0.63x + 25.2 mm Hg) and mean Doppler gradient correlated with mean pressure grad...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80460-0
更新日期:1986-03-01 00:00:00
abstract::Therapeutic fibrinolysis has been dominated by the experience with tissue-type plasminogen activator (t-PA), which proved little better than streptokinase in acute myocardial infarction. In contrast, endogenous fibrinolysis, using one-thousandth of the t-PA concentration, is regularly lysing fibrin and induced Thrombo...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2016.07.780
更新日期:2016-11-08 00:00:00
abstract::The normal anatomic relation of the anterior mitral leaflet to the left ventricular outflow tract suggests that significant aortic regurgitation should have a predictable hemodynamic effect on the motion and configuration of the leaflet, an effect that should be seen by two-dimensional echocardiography. Previous repor...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(84)80031-5
更新日期:1984-02-01 00:00:00
abstract::Circulating biomarkers have become increasingly important in diagnosing and risk stratifying patients with heart failure (HF). While the natriuretic peptides have received much focus, there is increasing interest in the role of circulating cardiac troponin (cTn) in detecting myocardial injury (often subclinical) in th...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2010.06.016
更新日期:2010-09-28 00:00:00
abstract:OBJECTIVES:This study sought to develop a regression-based method for characterization of QT interval behavior during exercise and to define the normal range of the resulting "dynamic" measures of repolarization during submaximal treadmill testing in men and women. BACKGROUND:The Bazett-corrected QT (QTc) interval dur...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(96)00351-8
更新日期:1996-11-15 00:00:00
abstract:UNLABELLED:We evaluated the response to clopidogrel among aspirin-resistant versus aspirin-sensitive patients undergoing elective coronary stenting. Patients (n = 150) treated with aspirin but not clopidogrel had blood samples drawn at baseline and 24 h after clopidogrel loading. Depending on the definition used, 9% to...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2005.08.058
更新日期:2006-01-03 00:00:00
abstract:OBJECTIVES:We sought to assess whether high dose estrogen treatment is associated with enhanced arterial reactivity in genetic males. BACKGROUND:Although estrogens have been shown to enhance arterial reactivity in women, and are thereby thought to confer cardiovascular benefit, the vascular effects of long-term estrog...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(97)00063-6
更新日期:1997-06-01 00:00:00
abstract::The prevalence of atrial fibrillation (AF) is related to age and is projected to rise exponentially as the population ages and the prevalence of cardiovascular risk factors increases. The risk of ischemic stroke is significantly increased in AF patients, and there is evidence of a graded increased risk of stroke assoc...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2010.05.028
更新日期:2010-09-07 00:00:00
abstract::To determine the rate of induction, specificity and evolution of electrically induced postmyocardial infarction ventricular arrhythmias, 10 dogs that underwent a sham operation and 20 dogs with experimental transmural apical myocardial infarction underwent serial closed chest electrophysiologic studies with programmed...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(85)80010-3
更新日期:1985-05-01 00:00:00
abstract:BACKGROUND:Pulmonary hypertension worsens prognosis in patients with heart failure (HF) and secondary mitral regurgitation (SMR). OBJECTIVES:This study sought to determine whether baseline pulmonary hypertension influences outcomes of transcatheter mitral valve repair (TMVr) in patients with HF with SMR. METHODS:In t...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2020.09.609
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVES:We hypothesized that intravascular ultrasound may identify significant coronary artery narrowing in the mildly diseased coronary artery of patients with insignificant or one- or two-vessel coronary artery disease. BACKGROUND:Necropsy studies have revealed that coronary angiography may underestimate stenosis...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90770-2
更新日期:1993-12-01 00:00:00