Ionic mechanisms of electronic inhibition and concealed conduction in rabbit atrioventricular nodal myocytes.

abstract：:One of the noninvasive methods of evaluating left ventricular performance is the measurement of left ventricular systolic time intervals (LVSTI). However, noninvasive measurement of right ventricular systole by this technique has been unreliable because of the inability to accurately time the onset of right ventricula...

journal_title：Circulation

authors： Hirschfeld S,Meyer R,Schwartz DC,Korfhagen J,Kaplan S

更新日期：1975-02-01 00:00:00

abstract：BACKGROUND:Coronary artery disease is the major cause of late cardiac allograft failure. However, few data exist regarding the natural history of changes in intimal and external elastic membrane (EEM) areas after heart transplantation. METHODS AND RESULTS:In 38 transplant recipients, serial intravascular ultrasound ex...

journal_title：Circulation

authors： Tsutsui H,Ziada KM,Schoenhagen P,Iyisoy A,Magyar WA,Crowe TD,Klingensmith JD,Vince DG,Rincon G,Hobbs RE,Yamagishi M,Nissen SE,Tuzcu EM

更新日期：2001-08-07 00:00:00

abstract：BACKGROUND:Progression of heart failure after initial myocardial injury is mediated in part by various redundant inflammatory mediators, including the widely expressed cyclooxygenase-2 (COX-2). Because COX-2 inhibitors are useful in treating many inflammation-mediated diseases, we asked whether COX-2 inhibition can att...

journal_title：Circulation

authors： Delgado RM 3rd,Nawar MA,Zewail AM,Kar B,Vaughn WK,Wu KK,Aleksic N,Sivasubramanian N,McKay K,Mann DL,Willerson JT

更新日期：2004-03-23 00:00:00

abstract：BACKGROUND:In contrast to healthy volunteers, regional differences of cardiac autonomic innervation have been described through the use of C11-hydroxyephedrine positron emission tomography (HED-PET) in the left ventricles of patients with dilated cardiomyopathy. The goal of the present study was to correlate HED-PET im...

journal_title：Circulation

authors： Ungerer M,Hartmann F,Karoglan M,Chlistalla A,Ziegler S,Richardt G,Overbeck M,Meisner H,Schömig A,Schwaiger M

更新日期：1998-01-20 00:00:00

abstract：BACKGROUND:Both glucose-insulin-potassium (GIK) and tri-iodothyronine (T3) may improve cardiovascular performance after coronary artery surgery (CABG) but their effects have not been directly compared and the effects of combined treatment are unknown. METHODS AND RESULTS:In 2 consecutive randomized double-blind placeb...

journal_title：Circulation

authors： Ranasinghe AM,Quinn DW,Pagano D,Edwards N,Faroqui M,Graham TR,Keogh BE,Mascaro J,Riddington DW,Rooney SJ,Townend JN,Wilson IC,Bonser RS

更新日期：2006-07-04 00:00:00

abstract：BACKGROUND:Fat inflammation may play an important role in comorbidities associated with obesity such as atherosclerosis. METHODS AND RESULTS:To first establish feasibility of fat transplantation, epididymal fat pads were harvested from wild-type C57BL/6J mice and transplanted into leptin-deficient (Lep(ob/ob)) mice. F...

journal_title：Circulation

authors： Ohman MK,Shen Y,Obimba CI,Wright AP,Warnock M,Lawrence DA,Eitzman DT

更新日期：2008-02-12 00:00:00

abstract：BACKGROUND:This study examines the limitations and complex management problems associated with the use of tiered-therapy, implantable cardioverter-defibrillators (ICDs). METHODS AND RESULTS:The study group comprises the first 154 patients undergoing implantation of tiered-therapy ICDs at our institution. Pulse generat...

journal_title：Circulation

authors： Nunain SO,Roelke M,Trouton T,Osswald S,Kim YH,Sosa-Suarez G,Brooks DR,McGovern B,Guy M,Torchiana DF

更新日期：1995-04-15 00:00:00

abstract：BACKGROUND:Recent studies of beta-adrenergic receptor (beta-AR) subtype signaling in in vitro preparations have raised doubts as to whether the cAMP/protein kinase A (PKA) signaling is activated in the same manner in response to beta2-AR versus beta1-AR stimulation. METHODS AND RESULTS:The present study compared, in t...

journal_title：Circulation

authors： Kuschel M,Zhou YY,Spurgeon HA,Bartel S,Karczewski P,Zhang SJ,Krause EG,Lakatta EG,Xiao RP

更新日期：1999-05-11 00:00:00

abstract：:In 526 patients undergoing a first percutaneous transluminal coronary angioplasty (PTCA) of a single native vessel, we studied the influence of length and eccentricity of the lesion on complications and primary success. Long stenoses (greater than or equal to 5 mm, n = 153) did not differ from short stenoses (less tha...

journal_title：Circulation

authors： Meier B,Gruentzig AR,Hollman J,Ischinger T,Bradford JM

更新日期：1983-03-01 00:00:00

abstract：BACKGROUND:The alpha(v)beta3 integrin plays a critical role in cell proliferation and migration. We hypothesized that vascular cell proliferation, a hallmark of injury-induced remodeling, can be tracked by targeting alpha(v)beta3 integrin expression in vivo. METHODS AND RESULTS:RP748, a novel 111In-labeled alpha(v)bet...

journal_title：Circulation

authors： Sadeghi MM,Krassilnikova S,Zhang J,Gharaei AA,Fassaei HR,Esmailzadeh L,Kooshkabadi A,Edwards S,Yalamanchili P,Harris TD,Sinusas AJ,Zaret BL,Bender JR

更新日期：2004-07-06 00:00:00

abstract：BACKGROUND:In the setting of atherosclerosis, endothelial vasomotor function is abnormal. Increased oxidative stress has been implicated as one potential mechanism for this observation. We therefore hypothesized that an antioxidant, ascorbic acid, would improve endothelium-dependent arterial dilation in patients with c...

journal_title：Circulation

authors： Levine GN,Frei B,Koulouris SN,Gerhard MD,Keaney JF Jr,Vita JA

更新日期：1996-03-15 00:00:00

abstract：BACKGROUND:A decreased cardiac compliance is a major feature of the cardiomyopathy of diabetes mellitus. Either an increase in the resistance afterload to the LV or an increase in collagen cross-linking induced by the formation of advanced glycosylation end products (AGEs) of collagen may be responsible for the stiff m...

journal_title：Circulation

authors： Norton GR,Candy G,Woodiwiss AJ

更新日期：1996-05-15 00:00:00

abstract：:Proton (hydrogen-1) magnetic resonance imaging techniques have potential for the detection and characterization of changes associated with myocardial ischemia. Since image contrast is dependent on T1 and T2 relaxation times, we examined these parameters in a canine preparation of occlusion of the left anterior descend...

journal_title：Circulation

authors： Johnston DL,Brady TJ,Ratner AV,Rosen BR,Newell JB,Pohost GM,Okada RD

更新日期：1985-03-01 00:00:00

abstract：:Labetalol was administered to six hypertensive subjects in increasing doses for seven days. A decrease in both supine and standing arterial pressure and heart rate was observed with no change in cardiac output and few side effects. Exercise tolerance was unaltered by the drug, but the heart rate and arterial pressure ...

journal_title：Circulation

authors： Mehta J,Cohn JN

更新日期：1977-02-01 00:00:00

abstract：BACKGROUND:The incidence, determinants, and outcome of postoperative atrial fibrillation (AF) after surgery for mitral regurgitation (MR) are poorly defined but may have important implications for timing of mitral valve surgery. METHODS AND RESULTS:In 762 patients in sinus rhythm with no AF history undergoing MR surgi...

journal_title：Circulation

authors： Kernis SJ,Nkomo VT,Messika-Zeitoun D,Gersh BJ,Sundt TM 3rd,Ballman KV,Scott CG,Schaff HV,Enriquez-Sarano M

更新日期：2004-10-19 00:00:00

abstract：BACKGROUND:Apoptosis in human atherosclerotic coronary plaques possibly causes plaque destabilization by contributing to the weakening and breaking down of the fibrous cap. We tested the hypothesis that apoptosis is quantitatively increased in unstable atherosclerotic plaques. METHODS AND RESULTS:We analyzed the expre...

journal_title：Circulation

authors： Rossi ML,Marziliano N,Merlini PA,Bramucci E,Canosi U,Belli G,Parenti DZ,Mannucci PM,Ardissino D

更新日期：2004-09-28 00:00:00

abstract：BACKGROUND:Denervation supersensitivity has been proposed as a mechanism for the relation between ventricular arrhythmias and the sympathetic nervous system. Evaluation of this phenomenon in humans has become feasible only recently with the development of noninvasive scintigraphic methods for evaluating the pattern of ...

journal_title：Circulation

authors： Calkins H,Allman K,Bolling S,Kirsch M,Wieland D,Morady F,Schwaiger M

更新日期：1993-07-01 00:00:00

abstract：BACKGROUND:From animal studies it emerged that nitric oxide is important for the modulation of CO2-mediated cerebral blood flow (CBF chemoregulation) but not for the pressor-dependent mechanism (mechanoregulation). This hypothesis was tested in 18 healthy subjects. METHODS AND RESULTS:Peak velocity (PV), diastolic vel...

journal_title：Circulation

authors： Lavi S,Egbarya R,Lavi R,Jacob G

更新日期：2003-04-15 00:00:00

abstract：BACKGROUND:Long-standing aortic stenosis causes significant left ventricular (LV) dysfunction, which may progress irreversibly. In many cases, LV function can be salvaged by aortic valve surgery, although debate exists regarding the best valve prosthesis to use. METHODS AND RESULTS:We studied 33 patients retrospective...

journal_title：Circulation

authors： Collinson J,Henein M,Flather M,Pepper JR,Gibson DG

更新日期：1999-11-09 00:00:00

abstract：:This review of the clinical studies of thromboxane synthase inhibitors (TXSIs) and thromboxane receptor blocking drugs (TXRBs) covers the years 1981 to the present. Clinical studies on TXSIs include those in normal volunteers as well as those in patients with angina, peripheral vascular disease and Raynaud's syndrome,...

journal_title：Circulation

authors： Fiddler GI,Lumley P

更新日期：1990-01-01 00:00:00

abstract：BACKGROUND:Perivascular adipose tissue (PVAT) surrounds most vessels and shares common features with brown adipose tissue (BAT). Although adaptive thermogenesis in BAT increases energy expenditure and is beneficial for metabolic diseases, little is known about the role of PVAT in vascular diseases such as atheroscleros...

journal_title：Circulation

authors： Chang L,Villacorta L,Li R,Hamblin M,Xu W,Dou C,Zhang J,Wu J,Zeng R,Chen YE

更新日期：2012-08-28 00:00:00

abstract：BACKGROUND:Dickkopf-related protein 3 (DKK3) is a secreted protein that is involved in the regulation of cardiac remodeling and vascular smooth muscle cell differentiation, but little is known about its role in atherosclerosis. METHODS:We tested the hypothesis that DKK3 is atheroprotective using both epidemiological a...

journal_title：Circulation

authors： Yu B,Kiechl S,Qi D,Wang X,Song Y,Weger S,Mayr A,Le Bras A,Karamariti E,Zhang Z,Barco Barrantes ID,Niehrs C,Schett G,Hu Y,Wang W,Willeit J,Qu A,Xu Q

更新日期：2017-09-12 00:00:00

abstract：BACKGROUND:Ibutilide is an action potential-prolonging antiarrhythmic currently in clinical trials. The drug shares structural similarities with E-4031 and dofetilide, specific blockers of the rapidly activating delayed rectifier K+ current (IKr). However, previous in vitro studies in guinea pig myocytes have indicated...

journal_title：Circulation

authors： Yang T,Snyders DJ,Roden DM

更新日期：1995-03-15 00:00:00

abstract：:As the appreciation of structural heart disease in children and adults has increased and as catheter-based closure procedures are now being performed in clinical practice, cardiovascular physicians have multiple compelling new reasons to better understand cardiac anatomic and spatial relationships. Current 2-dimension...

journal_title：Circulation

authors： Kim MS,Hansgen AR,Wink O,Quaife RA,Carroll JD

更新日期：2008-05-06 00:00:00

abstract：:Cardiovascular disease continues to be the leading cause of death among women in the United States. One of the barriers to improving cardiovascular disease outcomes in women is the lack of reliable, effective screening modalities. Breast arterial calcification has emerged as a potential risk stratification tool. Local...

journal_title：Circulation

authors： Bui QM,Daniels LB

更新日期：2019-02-19 00:00:00

abstract：:The Academic Research Consortium (ARC)-2 initiative revisited the clinical and angiographic end point definitions in coronary device trials, proposed in 2007, to make them more suitable for use in clinical trials that include increasingly complex lesion and patient populations and incorporate novel devices such as bio...

journal_title：Circulation

authors： Garcia-Garcia HM,McFadden EP,Farb A,Mehran R,Stone GW,Spertus J,Onuma Y,Morel MA,van Es GA,Zuckerman B,Fearon WF,Taggart D,Kappetein AP,Krucoff MW,Vranckx P,Windecker S,Cutlip D,Serruys PW,Academic Research Consortium

更新日期：2018-06-12 00:00:00

abstract：:Reperfusion of the globally ischemic myocardium with mannitol has been shown to preserve myocardial function. However, it remains unclear whether the mechanism of mannitol protection relates to its hyperosmolar or free radical scavenging properties. Three groups of isolated, perfused rabbit hearts underwent 45 min of ...

journal_title：Circulation

authors： Ouriel K,Ginsburg ME,Patti CS,Pearce FJ,Hicks GL

更新日期：1985-09-01 00:00:00

abstract：BACKGROUND:Vascular events during initial reperfusion after a period of hypothermic cardioplegic ischemia may play an important role in the recovery of mechanical function. Prior studies have shown (1) that dysfunction of the postischemic myocardium after normothermic ischemia can be ameliorated by vasodilation and (2)...

journal_title：Circulation

authors： Kawata H,Aoki M,Mayer JE Jr

更新日期：1993-11-01 00:00:00

abstract：BACKGROUND:We previously demonstrated that ischemic postconditioning decreases creatine kinase release, a surrogate marker for infarct size, in patients with acute myocardial infarction. Our objective was to determine whether ischemic postconditioning could afford (1) a persistent infarct size limitation and (2) an imp...

journal_title：Circulation

authors： Thibault H,Piot C,Staat P,Bontemps L,Sportouch C,Rioufol G,Cung TT,Bonnefoy E,Angoulvant D,Aupetit JF,Finet G,André-Fouët X,Macia JC,Raczka F,Rossi R,Itti R,Kirkorian G,Derumeaux G,Ovize M

更新日期：2008-02-26 00:00:00

abstract：BACKGROUND:Mutations in sarcomere protein, PRKAG2, LAMP2, alpha-galactosidase A (GLA), and several mitochondrial genes can cause rare familial cardiomyopathies, but their contribution to increased left ventricular wall thickness (LVWT) in the community is unknown. METHODS AND RESULTS:We studied 1862 unrelated particip...

journal_title：Circulation

authors： Morita H,Larson MG,Barr SC,Vasan RS,O'Donnell CJ,Hirschhorn JN,Levy D,Corey D,Seidman CE,Seidman JG,Benjamin EJ

更新日期：2006-06-13 00:00:00