Linking: a dynamic electrophysiologic phenomenon in macroreentry circuits.

abstract：BACKGROUND:We studied the growth-promoting effects of 2 sodium pump-selective cardiotonic steroids, ouabain and marinobufagenin, on cultured cells from vascular smooth muscle (VSMCs) from human umbilical vein and a rat VSMC line, A7r5. METHODS AND RESULTS:Both ouabain and marinobufagenin activated proliferation of the...

journal_title：Circulation

authors： Abramowitz J,Dai C,Hirschi KK,Dmitrieva RI,Doris PA,Liu L,Allen JC

更新日期：2003-12-16 00:00:00

abstract：:Acute cardiac rejection, syndrome X, and arterial hypertension can induce small vessel damage and, therefore, restriction of coronary reserve in the presence of normal epicardial coronary arteries. A characteristic response pattern to dipyridamole (DIP) infusion has been previously described in syndrome X and arterial...

journal_title：Circulation

authors： Picano E,De Pieri G,Salerno JA,Arbustini E,Distante A,Martinelli L,Pucci A,Montemartini C,Viganò M,Donato L

更新日期：1990-01-01 00:00:00

abstract：BACKGROUND:The purpose of this investigation was to establish normal values of RR variability for middle-aged persons and compare them with values found in patients early and late after myocardial infarction. We hypothesized that presence or absence of coronary heart disease, age, and sex (in this order of importance) ...

journal_title：Circulation

authors： Bigger JT Jr,Fleiss JL,Steinman RC,Rolnitzky LM,Schneider WJ,Stein PK

更新日期：1995-04-01 00:00:00

abstract：:The purpose of the present study was to evaluate potential diurnal changes in resting coronary blood flow under conditions of comparable myocardial oxygen requirements. We studied 21 conscious, resting dogs instrumented for the measurement of coronary flow, left ventricular pressure, and regional myocardial segment le...

journal_title：Circulation

authors： Fujita M,Franklin D

更新日期：1987-08-01 00:00:00

abstract：BACKGROUND:Two types of ischemia, pacing-induced and coronary occlusion-induced, have different effects on left ventricular diastolic properties. During pacing-induced ischemia, the diastolic pressure-volume relation is said to shift upward, whereas during coronary occlusion, it is said to shift rightward or downward. ...

journal_title：Circulation

authors： Takano H,Glantz SA

更新日期：1995-05-01 00:00:00

abstract：BACKGROUND:The ability of echocardiographic dyssynchrony to predict response to cardiac resynchronization therapy (CRT) has been unclear. METHODS AND RESULTS:A prospective, longitudinal study was designed with predefined dyssynchrony indexes and outcome variables to test the hypothesis that baseline dyssynchrony is as...

journal_title：Circulation

authors： Gorcsan J 3rd,Oyenuga O,Habib PJ,Tanaka H,Adelstein EC,Hara H,McNamara DM,Saba S

更新日期：2010-11-09 00:00:00

abstract：BACKGROUND:Functional mitral regurgitation (MR) is common in patients with heart failure and left ventricular (LV) dysfunction, and its severity may vary over time, depending primarily on the loading conditions. Because dynamic changes in the severity of functional MR may affect forward stroke volume, we hypothesized t...

journal_title：Circulation

authors： Lapu-Bula R,Robert A,Van Craeynest D,D'Hondt AM,Gerber BL,Pasquet A,Melin JA,De Kock M,Vanoverschelde JL

更新日期：2002-09-10 00:00:00

abstract：:To determine the effects of coronary angioplasty on coronary flow reserve (CFR), we studied 32 patients before and immediately after single-vessel coronary angioplasty and 31 patients evaluated late after angioplasty (7.5 +/- 1.2 months, mean +/- SEM). The geometry (percent area stenosis and minimal cross-sectional ar...

journal_title：Circulation

authors： Wilson RF,Johnson MR,Marcus ML,Aylward PE,Skorton DJ,Collins S,White CW

更新日期：1988-04-01 00:00:00

abstract：:Studies of the correlation of aortic valve gradient determined by continuous-wave Doppler echocardiography and that determined at catheterization have, to date, involved young patients and nonsimultaneous measurements. We therefore obtained simultaneous Doppler echocardiographic and catheter measurements of pressure g...

journal_title：Circulation

authors： Currie PJ,Seward JB,Reeder GS,Vlietstra RE,Bresnahan DR,Bresnahan JF,Smith HC,Hagler DJ,Tajik AJ

更新日期：1985-06-01 00:00:00

abstract：:Verapamil is extremely effective in the treatment of patients with hypertrophic cardiomyopathy. However, the basic physiologic actions of the drug may lead to serious adverse effects. An appreciation of this and an understanding of when these adverse effects are most likely to occur will minimize the potential of vera...

journal_title：Circulation

authors： Epstein SE,Rosing DR

更新日期：1981-09-01 00:00:00

abstract：BACKGROUND:Advances in surgical technique and perioperative myocardial protection have reduced the risk of aortic and mitral valve surgery. Improved methods of valve repair have reduced the proportion of patients who require valve replacement. However, patients who require valve replacement often have advanced disease ...

journal_title：Circulation

authors： Rao V,Christakis GT,Weisel RD,Buth KJ,Ikonomidis JS,Shirai T,Cohen G,David TE

更新日期：1996-11-01 00:00:00

abstract：BACKGROUND:Sodium-glucose cotransporter 2 inhibitors reduce the risk of heart failure hospitalization and cardiovascular death in patients with heart failure and reduced ejection fraction (HFrEF). However, their effects on cardiac structure and function in HFrEF are uncertain. METHODS:We designed a multicenter, random...

journal_title：Circulation

authors： Lee MMY,Brooksbank KJM,Wetherall K,Mangion K,Roditi G,Campbell RT,Berry C,Chong V,Coyle L,Docherty KF,Dreisbach JG,Labinjoh C,Lang NN,Lennie V,McConnachie A,Murphy CL,Petrie CJ,Petrie JR,Speirits IA,Sourbron S,Wel

更新日期：2020-11-13 00:00:00

abstract：BACKGROUND:Treatment with an antibody that binds beta3 integrins (abciximab; c7E3 Fab) at the time of coronary angioplasty decreases the need for repeat revascularization. Two potential mechanisms have been proposed to explain this effect: (1) inhibition of platelet aggregation or (2) interruption of ligand binding to ...

journal_title：Circulation

authors： Stouffer GA,Hu Z,Sajid M,Li H,Jin G,Nakada MT,Hanson SR,Runge MS

更新日期：1998-03-10 00:00:00

abstract：BACKGROUND:Peak dP/dt is a good index of ventricular performance that is not influenced by afterload, wall motion abnormalities, or the variations in ventricular anatomy and morphology commonly encountered among patients with congenital heart disease. Unfortunately, the clinical utility of peak dP/dt has been limited b...

journal_title：Circulation

authors： Rhodes J,Udelson JE,Marx GR,Schmid CH,Konstam MA,Hijazi ZM,Bova SA,Fulton DR

更新日期：1993-12-01 00:00:00

abstract：:In this study we extended the characterization of outcome in 1214 medically treated patients with coronary disease by considering nonfatal infarction and death together as ischemic events. At 7 years, the cumulative event rate was 47% (18% for nonfatal infarction as the initial event and 29% for death as the initial e...

journal_title：Circulation

authors： Harris PJ,Lee KL,Harrell FE Jr,Behar VS,Rosati RA

更新日期：1980-10-01 00:00:00

abstract：BACKGROUND:Hypercholesterolemia is a risk factor for coronary disease, and platelet reactivity is increased with hypercholesterolemia, suggesting a prethrombotic risk. The aim of this study was to measure mural platelet thrombus formation on an injured arterial wall in a model simulating vessel stenosis and plaque rupt...

journal_title：Circulation

authors： Lacoste L,Lam JY,Hung J,Letchacovski G,Solymoss CB,Waters D

更新日期：1995-12-01 00:00:00

abstract：:Esophageal perforation is a dreaded complication of atrial fibrillation ablation that occurs in 0.1% to 0.25% of atrial fibrillation ablation procedures. Delayed diagnosis is associated with the development of atrial-esophageal fistula (AEF) and increased mortality. The relationship between the esophagus and the left ...

journal_title：Circulation

authors： Kapur S,Barbhaiya C,Deneke T,Michaud GF

更新日期：2017-09-26 00:00:00

abstract：BACKGROUND:C-reactive protein (CRP) plasma levels have been associated with short- and long-term occurrence of coronary events. We investigated whether circulating inflammatory cell responsiveness to low-grade stimuli could contribute to the reported association between CRP and coronary events. METHODS AND RESULTS:We ...

journal_title：Circulation

authors： Liuzzo G,Angiolillo DJ,Buffon A,Rizzello V,Colizzi C,Ginnetti F,Biasucci LM,Maseri A

更新日期：2001-05-08 00:00:00

abstract：BACKGROUND:Alteration of the circadian rhythm and increased vascular senescence are linked to cardiovascular disease. Per2, a circadian gene, is known to regulate endothelium-dependent vasomotion. However, the mechanism by which Per2 affects endothelial function is unknown. We hypothesize that endothelial dysfunction i...

journal_title：Circulation

authors： Wang CY,Wen MS,Wang HW,Hsieh IC,Li Y,Liu PY,Lin FC,Liao JK

更新日期：2008-11-18 00:00:00

abstract：BACKGROUND:We investigated whether decreased myofilament calcium contractile activation may, in part, contribute to heart failure. METHODS AND RESULTS:Calcium concentration required for 50% activation and Hill coefficient for fibers from nonfailing and failing human hearts at pH 7.1 were not different. Maximum calcium...

journal_title：Circulation

authors： Hajjar RJ,Schwinger RH,Schmidt U,Kim CS,Lebeche D,Doye AA,Gwathmey JK

更新日期：2000-04-11 00:00:00

abstract：BACKGROUND:Genetic testing for long-QT syndrome (LQTS) has diagnostic, prognostic, and therapeutic implications. Hundreds of causative mutations in 12 known LQTS-susceptibility genes have been identified. Genetic testing that includes the 3 most commonly mutated genes is available clinically. Distinguishing pathogenic ...

journal_title：Circulation

authors： Kapa S,Tester DJ,Salisbury BA,Harris-Kerr C,Pungliya MS,Alders M,Wilde AA,Ackerman MJ

更新日期：2009-11-03 00:00:00

abstract：BACKGROUND:Studies have consistently shown that ventricular tachycardia (VT) and sudden cardiac death (SCD) complicate the long-term outcome after tetralogy of Fallot repair, yet the diagnostic and predictive value of electrophysiological testing in this population is uncertain. METHODS AND RESULTS:A multicenter cohor...

journal_title：Circulation

authors： Khairy P,Landzberg MJ,Gatzoulis MA,Lucron H,Lambert J,Marçon F,Alexander ME,Walsh EP

更新日期：2004-04-27 00:00:00

abstract：BACKGROUND:Mild and moderate functional ischemic mitral insufficiency present at the time of surgical revascularization present clinical uncertainty. It is unclear whether the relatively poor outcomes in this cohort are dependent on valvular function or related to left ventricular dysfunction. The purpose of this study...

journal_title：Circulation

authors： Grossi EA,Crooke GA,DiGiorgi PL,Schwartz CF,Jorde U,Applebaum RM,Ribakove GH,Galloway AC,Grau JB,Colvin SB

更新日期：2006-07-04 00:00:00

abstract：BACKGROUND:NO has been advocated as an adjunct to cardioplegia solutions. However, NO undergoes a rapid biradical reaction with superoxide anions to produce peroxynitrite (ONOO(-)). ONOO(-) in crystalloid cardioplegia solution induces injury to coronary endothelium and to systolic function after cardioplegia and reperf...

journal_title：Circulation

authors： Nakamura M,Thourani VH,Ronson RS,Velez DA,Ma XL,Katzmark S,Robinson J,Schmarkey LS,Zhao ZQ,Wang NP,Guyton RA,Vinten-Johansen J

更新日期：2000-11-07 00:00:00

abstract：BACKGROUND:The relations of insulin sensitivity (IS) to hypertension incidence may vary according to baseline age, body mass index (BMI), and blood pressure (BP). METHODS AND RESULTS:We investigated the relations of IS (insulin sensitivity index, ISI(0,120)) to 4-year incidence of hypertension and BP progression in 19...

journal_title：Circulation

authors： Arnlöv J,Pencina MJ,Nam BH,Meigs JB,Fox CS,Levy D,D'Agostino RB,Vasan RS

更新日期：2005-09-20 00:00:00

abstract：BACKGROUND:Physical activity is associated with lower risk of cardiovascular disease, but the mechanisms are uncertain. Hemostatic and inflammatory markers have been linked with risk of cardiovascular disease. We therefore examined the relationship between physical activity and hemostatic and inflammatory variables. M...

journal_title：Circulation

authors： Wannamethee SG,Lowe GD,Whincup PH,Rumley A,Walker M,Lennon L

更新日期：2002-04-16 00:00:00

abstract：:The relationship between the degree of obesity and the incidence of cardiovascular disease (CVD) was reexamined in the 5209 men and women of the original Framingham cohort. Recent observations of disease occurrence over 26 years indicate that obesity, measured by Metropolitan Relative Weight, was a significant indepen...

journal_title：Circulation

authors： Hubert HB,Feinleib M,McNamara PM,Castelli WP

更新日期：1983-05-01 00:00:00

abstract：:The National Heart, Lung, and Blood Institute and Office of Rare Diseases at the National Institutes of Health organized a workshop (September 14 to 15, 2006, in Bethesda, Md) to advise on new research directions needed for improved identification and treatment of rare inherited arrhythmias. These included the followi...

journal_title：Circulation

authors： Lehnart SE,Ackerman MJ,Benson DW Jr,Brugada R,Clancy CE,Donahue JK,George AL Jr,Grant AO,Groft SC,January CT,Lathrop DA,Lederer WJ,Makielski JC,Mohler PJ,Moss A,Nerbonne JM,Olson TM,Przywara DA,Towbin JA,Wang LH,M

更新日期：2007-11-13 00:00:00

abstract：:Platelet function can be assessed by various techniques in vitro or in vivo, but methodological problems in the field are considerable. By use of the conventional in vitro technique (Born aggregometry), it has been shown that sympathoadrenal activation in vivo (e.g., mental stress, epinephrine infusions, exercise, and...

journal_title：Circulation

authors： Hjemdahl P,Larsson PT,Wallén NH

更新日期：1991-12-01 00:00:00

abstract：BACKGROUND:An inverse association between moderate alcohol consumption and coronary heart disease (CHD) has been observed in several epidemiological studies. To assess whether a similar association exists among diabetics, we examined the relation between light to moderate alcohol consumption and CHD in men with and wit...

journal_title：Circulation

authors： Ajani UA,Gaziano JM,Lotufo PA,Liu S,Hennekens CH,Buring JE,Manson JE

更新日期：2000-08-01 00:00:00