QT interval is linked to 2 long-QT syndrome loci in normal subjects.

abstract：BACKGROUND:Calcium-insensitive transient outward current (I(to)) is important to the development of cardiac memory (CM), which itself reflects the capacity of the heart to remodel electrophysiologically. We used cardiac pacing to test the hypothesis that CM evolution can be explained by developmental maturation of I(to...

journal_title：Circulation

authors： Plotnikov AN,Sosunov EA,Patberg KW,Anyukhovsky EP,Gainullin RZ,Shlapakova IN,Krishnamurthy G,Danilo P Jr,Rosen MR

更新日期：2004-08-03 00:00:00

abstract：BACKGROUND:Guidelines have proposed that atrial fibrillation (AF) can occur as an isolated event, particularly when precipitated by a secondary, or reversible, condition. However, knowledge of long-term AF outcomes after diagnosis during a secondary precipitant is limited. METHODS AND RESULTS:In 1409 Framingham Heart ...

journal_title：Circulation

authors： Lubitz SA,Yin X,Rienstra M,Schnabel RB,Walkey AJ,Magnani JW,Rahman F,McManus DD,Tadros TM,Levy D,Vasan RS,Larson MG,Ellinor PT,Benjamin EJ

更新日期：2015-05-12 00:00:00

abstract：BACKGROUND:Interferons (IFNs) play an important role in antiviral defense and have therapeutic potential in coxsackievirus heart disease. However, little is known about the relative contributions of type I and type II IFN signaling in coxsackievirus B3 (CVB3) infection or their role in the cardioselective nature of CVB...

journal_title：Circulation

authors： Wessely R,Klingel K,Knowlton KU,Kandolf R

更新日期：2001-02-06 00:00:00

abstract：BACKGROUND:Recognition of rates and causes of hard, patient-centered outcomes of death and cerebrovascular events (CVEs) after heart rhythm disorder management (HRDM) procedures is an essential step for the development of quality improvement programs in electrophysiology laboratories. Our primary aim was to assess and ...

journal_title：Circulation

authors： Lee JZ,Ling J,Diehl NN,Hodge DO,Padmanabhan D,Killu AM,Madhavan M,Noseworthy PA,Kapa S,McLeod CJ,Cha YM,Deshmukh AJ,Srivathsan K,Kusumoto FM,Shen WK,Friedman PA,Munger TM,Asirvatham SJ,Packer DL,Mulpuru SK

更新日期：2018-01-02 00:00:00

abstract：BACKGROUND:Cardiac volume overload by an aortocaval shunt increases left ventricular end-diastolic pressure (LVEDP) and plasma and cardiac renin activity and results in LV hypertrophy. To a similar extent, the angiotensin-converting enzyme (ACE) inhibitors enalapril and quinapril prevent the increase in LVEDP. However,...

journal_title：Circulation

authors： Ruzicka M,Skarda V,Leenen FH

更新日期：1995-12-15 00:00:00

abstract：:In patients with atrioventricular (A-V) nodal re-entrant paroxysmal supraventricular tachycardia (PSVT), atrial extrastimulus technique frequently reveals discontinuous A1-A2, H1-H2 curves suggestive of dual A-V nodal pathways. To further test the hypothesis that these curves in fact reflect dual A-V nodal pathways, a...

journal_title：Circulation

authors： Wu D,Denes P,Wyndham C,Amat-y-Leon F,Dhingra RC,Rosen KM

更新日期：1975-11-01 00:00:00

abstract：BACKGROUND:Epidemiological findings suggest an association between low-for-age birth weight and the risk to develop coronary heart diseases in adulthood. During pregnancy, an imbalance between fetal demands and supply may result in permanent alterations of neuroendocrine development in the fetus. We evaluated whether c...

journal_title：Circulation

authors： Ruijtenbeek K,le Noble FA,Janssen GM,Kessels CG,Fazzi GE,Blanco CE,De Mey JG

更新日期：2000-12-05 00:00:00

abstract：:The goals of electrocardiographic (ECG) monitoring in hospital settings have expanded from simple heart rate and basic rhythm determination to the diagnosis of complex arrhythmias, myocardial ischemia, and prolonged QT interval. Whereas computerized arrhythmia analysis is automatic in cardiac monitoring systems, compu...

journal_title：Circulation

authors： Drew BJ,Califf RM,Funk M,Kaufman ES,Krucoff MW,Laks MM,Macfarlane PW,Sommargren C,Swiryn S,Van Hare GF,American Heart Association.,Councils on Cardiovascular Nursing, Clinical Cardiology, and Cardiovascular Disease in the Young.

更新日期：2004-10-26 00:00:00

abstract：BACKGROUND:Coronary blood flow occurs mainly during the diastolic phase of each cardiac cycle and is mainly dependent on diastolic driving pressure, especially in the left anterior descending coronary artery (LAD). We hypothesized that calculation of the ratio of the diastolic driving pressure of a stenotic LAD to its ...

journal_title：Circulation

authors： Abe M,Tomiyama H,Yoshida H,Doba N

更新日期：2000-11-07 00:00:00

abstract：BACKGROUND:In patients with neurogenic orthostatic hypotension (NOH), the availability of the sympathetic neurotransmitter norepinephrine (NE) in the synaptic cleft is insufficient to maintain blood pressure while in the standing posture. METHODS AND RESULTS:We determined the effect of oral administration of the synth...

journal_title：Circulation

authors： Kaufmann H,Saadia D,Voustianiouk A,Goldstein DS,Holmes C,Yahr MD,Nardin R,Freeman R

更新日期：2003-08-12 00:00:00

abstract：BACKGROUND:Orthostatic intolerance is characterized by postural tachycardia syndrome (POTS) with exaggerated tachycardia, orthostatic symptoms, and "pooling" (which comprises acrocyanosis and dependent edema when upright). My colleagues and I tested the hypothesis that pooling results from increased venous compliance i...

journal_title：Circulation

authors： Stewart JM

更新日期：2002-05-14 00:00:00

abstract：BACKGROUND:Endurance athletes have higher high density lipoprotein (HDL) concentrations than sedentary controls. To examine the mechanism for this effect, we compared HDL apoprotein metabolism in 10 endurance athletes aged 34 +/- 6 years (mean +/- SD) and 10 sedentary men aged 36 +/- 8 years. METHODS AND RESULTS:Subje...

journal_title：Circulation

authors： Thompson PD,Cullinane EM,Sady SP,Flynn MM,Chenevert CB,Herbert PN

更新日期：1991-07-01 00:00:00

abstract：BACKGROUND:Impaired endothelium-dependent NO-mediated vasodilation is a key feature of essential hypertension and may precede the increase in blood pressure. We investigated whether transport of the NO precursor L-arginine is related to decreased endothelial function. METHODS AND RESULTS:Radiotracer kinetics ([3H]L-ar...

journal_title：Circulation

authors： Schlaich MP,Parnell MM,Ahlers BA,Finch S,Marshall T,Zhang WZ,Kaye DM

更新日期：2004-12-14 00:00:00

abstract：BACKGROUND:A role for myeloperoxidase (MPO) as a mediator of coronary artery disease and acute coronary syndromes has recently received considerable attention. Although active MPO and hypochlorite-modified proteins and peptides have been detected in human atherosclerotic lesions, detection of novel chlorinated oxidized...

journal_title：Circulation

authors： Thukkani AK,McHowat J,Hsu FF,Brennan ML,Hazen SL,Ford DA

更新日期：2003-12-23 00:00:00

abstract：:Noninvasive gated cardiac blood pool imaging with technetium-99m autologous erythrocytes was employed to differentiate reversible verus irreversible abnormal ventricular segmental contraction by regional wall and pump responses to sublingual nitroglycerin in 25 patients with chronic coronary heart disease. In 12 patie...

journal_title：Circulation

authors： Salel AF,Berman DS,DeNardo GL,Mason DT

更新日期：1976-06-01 00:00:00

abstract：BACKGROUND:Hypoxia from birth in immature rabbits increases the tolerance of isolated hearts to ischemia compared with age-matched normoxic rabbits. We determined whether this increased tolerance to ischemia was due to an alteration in the ATP-sensitive potassium (KATP) channel and whether increased KATP channel activa...

journal_title：Circulation

authors： Baker JE,Curry BD,Olinger GN,Gross GJ

更新日期：1997-03-04 00:00:00

abstract：BACKGROUND:For patients with acute dilated cardiomyopathy, definition of prognosis and of clinical features predictive of outcome is particularly important due to the availability of cardiac transplantation and other innovative treatment strategies. METHODS AND RESULTS:We reviewed our experience with 24 children under...

journal_title：Circulation

authors： Matitiau A,Perez-Atayde A,Sanders SP,Sluysmans T,Parness IA,Spevak PJ,Colan SD

更新日期：1994-09-01 00:00:00

abstract：:We examined the temporal kinetics of onset and offset of the cardiac electrophysiologic effects of orally administered amiodarone in chronically instrumented, unsedated adult dogs (n = 8). Right atrial (RA), atrioventricular nodal (AVN), and right ventricular (RV) effective refractory period (ERP), and AVN functional ...

journal_title：Circulation

authors： Tuna IC,Qi AC,Gornick C,Bolman RM 3rd,Benditt DG

更新日期：1985-12-01 00:00:00

abstract：BACKGROUND:This study reports on the trends in the volume and outcomes of coronary revascularization procedures performed on Medicare beneficiaries between 2008 and 2012. METHODS AND RESULTS:This retrospective study identifies all Medicare beneficiaries undergoing a coronary revascularization procedure: coronary arter...

journal_title：Circulation

authors： Culler SD,Kugelmass AD,Brown PP,Reynolds MR,Simon AW

更新日期：2015-01-27 00:00:00

abstract：BACKGROUND:Mechanical dyssynchrony is a potential means to predict response to cardiac resynchronization therapy (CRT). We hypothesized that novel echocardiographic image speckle tracking can quantify dyssynchrony and predict response to CRT. METHODS AND RESULTS:Seventy-four subjects were studied: 64 heart failure pat...

journal_title：Circulation

authors： Suffoletto MS,Dohi K,Cannesson M,Saba S,Gorcsan J 3rd

更新日期：2006-02-21 00:00:00

abstract：BACKGROUND:Ischemia-induced electrophysiological changes are more prominent in epicardial cells than in endocardial cells. Epicardial action potentials shorten more than endocardial action potentials during ischemia. Since the L-type Ca2+ current plays an important role in the maintenance of action potential duration, ...

journal_title：Circulation

authors： Kimura S,Bassett AL,Furukawa T,Furukawa N,Myerburg RJ

更新日期：1991-08-01 00:00:00

abstract：:The ability to quantify the quality of cardiovascular care critically depends on the translation of recommendations for high-quality care into the measurement of that care. As payers and regulatory agencies increasingly seek to quantify healthcare quality, the implications of the measurement process on practicing phys...

journal_title：Circulation

authors： Spertus JA,Eagle KA,Krumholz HM,Mitchell KR,Normand SL,American College of Cardiology.,American Heart Association Task Force on Performance Measures.

更新日期：2005-04-05 00:00:00

abstract：BACKGROUND:Myocardial necrosis can occur during percutaneous coronary intervention (PCI) despite optimal adjunctive pharmacology and careful technique. We investigated the mechanisms of procedural infarction using angiographic analysis, intravascular ultrasound, and delayed-enhancement magnetic resonance imaging. METH...

journal_title：Circulation

authors： Porto I,Selvanayagam JB,Van Gaal WJ,Prati F,Cheng A,Channon K,Neubauer S,Banning AP

更新日期：2006-08-15 00:00:00

abstract：BACKGROUND:Pharmacological ventricular rate control is an acceptable atrial fibrillation (AF) therapy limited by systemic toxicity. We postulate that focal catheter-based drug delivery into the atrioventricular nodal (AVN) region may effectively control ventricular rate during AF without systemic toxicity. This study e...

journal_title：Circulation

authors： Sigg DC,Hiniduma-Lokuge P,Coles JA Jr,Falkner P,Rose R,Urban JF,Ujhelyi MR

更新日期：2006-05-23 00:00:00

abstract：BACKGROUND:Atherosclerosis is a multifactorial disease in which inflammatory processes play an important role. Inflammation underlies lesion evolution at all stages, from establishment to plaque rupture and thrombosis. Costimulatory molecules of the tumor necrosis factor superfamily such as CD40/CD40L and OX40/OX40L ha...

journal_title：Circulation

authors： Olofsson PS,Söderström LA,Wågsäter D,Sheikine Y,Ocaya P,Lang F,Rabu C,Chen L,Rudling M,Aukrust P,Hedin U,Paulsson-Berne G,Sirsjö A,Hansson GK

更新日期：2008-03-11 00:00:00

abstract：:We studied the effects of experimentally induced emotional stress (mental arithmetic) on different hemodynamic parameters, catecholamine levels, and serum and platelet function tests in 25 postinfarction patients and in 10 apparently healthy, age-matched control subjects. Mental stress (10 minutes) induced significant...

journal_title：Circulation

authors： Grignani G,Soffiantino F,Zucchella M,Pacchiarini L,Tacconi F,Bonomi E,Pastoris A,Sbaffi A,Fratino P,Tavazzi L

更新日期：1991-04-01 00:00:00

abstract：BACKGROUND:Endocardial mapping using standard electrode catheters is often technically limited in ventricular tachycardia and constitutes a major obstacle to successful ablation. We wished to examine the utility of a basket-shaped multielectrode mapping catheter (MMC) in the mapping and ablation of ventricular tachycar...

journal_title：Circulation

authors： Eldar M,Ohad DG,Goldberger JJ,Rotstein Z,Hsu S,Swanson DK,Greenspon AJ

更新日期：1997-10-07 00:00:00

abstract：BACKGROUND:Patients with atrial fibrillation (AF) often take multiple medications. METHODS AND RESULTS:We examined characteristics and compared adjusted outcomes between rivaroxaban and warfarin according to number of concomitant baseline medications and the presence of combined cytochrome P450 3A4 and P-glycoprotein ...

journal_title：Circulation

authors： Piccini JP,Hellkamp AS,Washam JB,Becker RC,Breithardt G,Berkowitz SD,Halperin JL,Hankey GJ,Hacke W,Mahaffey KW,Nessel CC,Singer DE,Fox KA,Patel MR

更新日期：2016-01-26 00:00:00

abstract：BACKGROUND:Sympathetic activation and respiratory abnormalities may each be implicated in the pathophysiology of congestive heart failure (CHF). Chemoreflexes are an important mechanism regulating both sympathetic drive and breathing. We therefore tested the hypothesis that chemoreflex function is altered in CHF. METH...

journal_title：Circulation

authors： Narkiewicz K,Pesek CA,van de Borne PJ,Kato M,Somers VK

更新日期：1999-07-20 00:00:00

abstract：:Verapamil, a calcium antagonist, has been used extensively for treatment of cardiac arrhythmias. Concern persists, however, that it may seriously depress myocardial function in cardiac patients. To investigate this possibility, 20 patients with coronary artery disease (CAD) but no heart failure were given intravenous ...

journal_title：Circulation

authors： Ferlinz J,Easthope JL,Aronow WS

更新日期：1979-02-01 00:00:00