Paradoxic decrease in ischemic mitral regurgitation with papillary muscle dysfunction: insights from three-dimensional and contrast echocardiography with strain rate measurement.

abstract：BACKGROUND:We measured the content and activities of components of the beta-adrenergic receptor-G protein-adenylate cyclase complex and adrenergic neurotransmitter levels in left and right ventricular myocardial preparations derived from 77 end-stage failing human hearts from patients with idiopathic dilated cardiomyop...

journal_title：Circulation

authors： Bristow MR,Anderson FL,Port JD,Skerl L,Hershberger RE,Larrabee P,O'Connell JB,Renlund DG,Volkman K,Murray J

更新日期：1991-09-01 00:00:00

abstract：:To determine whether real-time two-dimensional echocardiography (2-D echo) can estimate the extent of myocardial involvement in patients with acute myocardial infarction (MI), regional wall motion on serial short-axis 2-D echo recordings was analyzed and the summed scores were compared with estimates of infarct involv...

journal_title：Circulation

authors： Nixon JV,Narahara KA,Smitherman TC

更新日期：1980-12-01 00:00:00

abstract：BACKGROUND:Pharmacogenetic-guided dosing of warfarin is a promising application of "personalized medicine" but has not been adequately tested in randomized trials. METHODS AND RESULTS:Consenting patients (n=206) being initiated on warfarin were randomized to pharmacogenetic-guided or standard dosing. Buccal swab DNA w...

journal_title：Circulation

authors： Anderson JL,Horne BD,Stevens SM,Grove AS,Barton S,Nicholas ZP,Kahn SF,May HT,Samuelson KM,Muhlestein JB,Carlquist JF,Couma-Gen Investigators.

更新日期：2007-11-27 00:00:00

abstract：BACKGROUND:Diabetes is an independent risk factor for the development of neointimal hyperplasia and subsequent vein graft failure after coronary or peripheral artery bypass grafting. We evaluate a new mouse model of surgical vein grafting to investigate the mechanisms of neointimal formation in the setting of type 2 di...

journal_title：Circulation

authors： Salzberg SP,Filsoufi F,Anyanwu A,von Harbou K,Karlof E,Carpentier A,Dansky HM,Adams DH

更新日期：2006-07-04 00:00:00

abstract：BACKGROUND:The renin-angiotensin system regulates blood pressure through its effects on vascular tone, renal hemodynamics, and renal sodium and fluid balance. METHODS AND RESULTS:Using data from a large population-based sample of 1488 siblings having a mean age of 14.8 years and belonging to the youngest generation of...

journal_title：Circulation

authors： Fornage M,Amos CI,Kardia S,Sing CF,Turner ST,Boerwinkle E

更新日期：1998-05-12 00:00:00

abstract：BACKGROUND:Whether cardiac rehabilitation (CR) is effective in patients older than 75 years, who have been excluded from most trials, remains unclear. We enrolled patients 46 to 86 years old in a randomized trial and assessed the effects of 2 months of post-myocardial infarction (MI) CR on total work capacity (TWC, in ...

journal_title：Circulation

authors： Marchionni N,Fattirolli F,Fumagalli S,Oldridge N,Del Lungo F,Morosi L,Burgisser C,Masotti G

更新日期：2003-05-06 00:00:00

abstract：BACKGROUND:Thrombus formation within a coronary vessel is the acute precipitating event in most acute coronary syndromes. Recently, constitutive nitric oxide synthase (cNOS) has been identified in human platelets, and platelet-derived nitric oxide has been shown to inhibit platelet recruitment after aggregation. Howeve...

journal_title：Circulation

authors： Freedman JE,Ting B,Hankin B,Loscalzo J,Keaney JF Jr,Vita JA

更新日期：1998-10-13 00:00:00

abstract：BACKGROUND:In the Basel Antiarrhythmic Study of Infarct Survival trial, low-dose amiodarone improved 1-year survival in patients with asymptomatic complex ventricular arrhythmias persisting 2 weeks after myocardial infarction. To assess whether this beneficial effect persisted despite discontinuation of amiodarone afte...

journal_title：Circulation

authors： Pfisterer ME,Kiowski W,Brunner H,Burckhardt D,Burkart F

更新日期：1993-02-01 00:00:00

abstract：BACKGROUND:Titin is a giant elastic protein that spans the half-sarcomere from Z-disk to M-band. It acts as a molecular spring and mechanosensor and has been linked to striated muscle disease. The pathways that govern titin-dependent cardiac growth and contribute to disease are diverse and difficult to dissect. METHOD...

journal_title：Circulation

authors： Radke MH,Polack C,Methawasin M,Fink C,Granzier HL,Gotthardt M

更新日期：2019-04-09 00:00:00

abstract：BACKGROUND:Unlike the Western world, valvular disease ranks among the major cardiovascular afflictions in Africa. Acute rheumatic fever and chronic rheumatic valvular disease in their most virulent form are still commonly encountered and impose a huge burden on limited healthcare resources. METHODS AND RESULTS:We perf...

journal_title：Circulation

authors： Essop MR,Nkomo VT

更新日期：2005-12-06 00:00:00

abstract：BACKGROUND:Atrial fibrillation (AF) is frequently encountered in patients with heart failure (HF) and is also a predictor of morbidity and mortality in this population. Recent experimental studies have shown electrical and structural atrial remodeling with increased fibrosis in animals with HF and have suggested a prev...

journal_title：Circulation

authors： Vermes E,Tardif JC,Bourassa MG,Racine N,Levesque S,White M,Guerra PG,Ducharme A

更新日期：2003-06-17 00:00:00

abstract：BACKGROUND:Accumulating evidence suggests that several subsets of regulatory T cells that actively mediate immunologic tolerance play crucial roles in atherogenesis. Recently, orally administered anti-CD3 monoclonal antibody has been shown as an inducer of novel regulatory T cells expressing latency-associated peptide ...

journal_title：Circulation

authors： Sasaki N,Yamashita T,Takeda M,Shinohara M,Nakajima K,Tawa H,Usui T,Hirata K

更新日期：2009-11-17 00:00:00

abstract：:While spatial asynergy at end-systole has been well characterized in patients with coronary artery disease, assessment of regional asynchrony has been hampered by technical constraints. We developed a computer-assisted method for analyzing regional asynchrony from the equilibrium (ECG-gated) radionuclide ventriculogra...

journal_title：Circulation

authors： Holman BL,Wynne J,Idoine J,Neill J

更新日期：1980-06-01 00:00:00

abstract：BACKGROUND:Nitric oxide (NO) modulates autonomic effects on myocardial contractility and sinus and atrioventricular nodal function of the heart. Whether NO influences autonomic actions on ventricular electrophysiological properties and arrhythmogenesis is not known. METHODS AND RESULTS:Four groups consisting of 43 aut...

journal_title：Circulation

authors： Fei L,Baron AD,Henry DP,Zipes DP

更新日期：1997-12-02 00:00:00

abstract：BACKGROUND:Aerobic power declines with age. The degree to which this decline is reversible remains unclear. In a 30-year longitudinal follow-up study, the cardiovascular adaptations to exercise training in 5 middle-aged men previously trained in 1966 were evaluated to assess the degree to which the age-associated decli...

journal_title：Circulation

authors： McGuire DK,Levine BD,Williamson JW,Snell PG,Blomqvist CG,Saltin B,Mitchell JH

更新日期：2001-09-18 00:00:00

abstract：BACKGROUND:The synthetic catecholamine dobutamine increases stroke volume in normal subjects and in patients with congestive heart failure. In addition to its direct influence on myocardial contractility, dobutamine may significantly modulate vascular tone because of its alpha- and beta-adrenergic agonist activity. ME...

journal_title：Circulation

authors： Binkley PF,Murray KD,Watson KM,Myerowitz PD,Leier CV

更新日期：1991-09-01 00:00:00

abstract：BACKGROUND:Impaired endothelium-dependent vasodilation is an early sign of atherosclerosis in hypercholesterolemic patients. We hypothesized that lipid-lowering therapy can improve endothelial function and that this effect is mainly mediated by increased bioavailability of nitric oxide (NO). METHODS AND RESULTS:In a r...

journal_title：Circulation

authors： John S,Schlaich M,Langenfeld M,Weihprecht H,Schmitz G,Weidinger G,Schmieder RE

更新日期：1998-07-21 00:00:00

abstract：BACKGROUND:Atherosclerosis is associated with immune responses to oxidized lipoproteins and certain microorganisms, but the role of specific immunity has remained unclear. METHODS AND RESULTS:To study the role of immunity in atherosclerosis, we crossed atherosclerosis-prone apoE(-/-) mice with immunodeficient scid/sci...

journal_title：Circulation

authors： Zhou X,Nicoletti A,Elhage R,Hansson GK

更新日期：2000-12-12 00:00:00

abstract：BACKGROUND:Insulin sensitivity and cardiovascular risk profile were examined in 20 healthy, nonobese, middle-aged men who were long-term users of nicotine-containing chewing gum and in 20 matched control subjects who did not use nicotine. METHODS AND RESULTS:Long-term use of nicotine-containing chewing gum was associa...

journal_title：Circulation

authors： Eliasson B,Taskinen MR,Smith U

更新日期：1996-09-01 00:00:00

abstract：BACKGROUND:We investigated whether electrical stimulation (STIM) of efferent vagus nerves may suppress nuclear factor (NF)-kappaB activation and the inflammatory cascade in hemorrhagic (Hem) shock. METHODS AND RESULTS:Rats were subjected to bilateral cervical vagotomy (VGX) or sham surgical procedures. Hem shock was i...

journal_title：Circulation

authors： Guarini S,Altavilla D,Cainazzo MM,Giuliani D,Bigiani A,Marini H,Squadrito G,Minutoli L,Bertolini A,Marini R,Adamo EB,Venuti FS,Squadrito F

更新日期：2003-03-04 00:00:00

abstract：BACKGROUND:Electrophysiological mechanisms by which adenosine may activate cardiac afferent neurons are unknown. Slow afterhyperpolarizations (AHPs) follow action potentials in a subset of vagal C afferents, rendering them inexcitable. The purpose of this study was to test the hypothesis that adenosine increases vagal ...

journal_title：Circulation

authors： Middlekauff HR,Doering A,Weiss JN

更新日期：2001-03-06 00:00:00

abstract：BACKGROUND:Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is an inherited cardiomyopathy characterized by right ventricular dysfunction and ventricular arrhythmias. A recent study reported mutations in PKP2, encoding the desmosomal protein plakophilin-2, associated with ARVD/C. The purpose of our st...

journal_title：Circulation

authors： Dalal D,Molin LH,Piccini J,Tichnell C,James C,Bomma C,Prakasa K,Towbin JA,Marcus FI,Spevak PJ,Bluemke DA,Abraham T,Russell SD,Calkins H,Judge DP

更新日期：2006-04-04 00:00:00

abstract：:Total body surface maps from 15 subjects with left bundle branch block and normal axis (LBBB-NA) and 10 subjects with left bundle branch block and left axis (LBBB-LA) were analyzed and compared with maps from normal subjects. In 19 of the 25 subjects with LBBB, the timing of early upper sternal positivity was similar ...

journal_title：Circulation

authors： Sohi GS,Flowers NC,Horan LG,Sridharan MR,Johnson JC

更新日期：1983-03-01 00:00:00

abstract：BACKGROUND:The clinical significance and pathophysiological mechanisms of reverse redistribution on stress-redistribution thallium-201 myocardial scintigraphy in patients with chronic coronary artery disease are unclear. Recent studies have shown that thallium-201 reinjection is a useful technique for the detection of ...

journal_title：Circulation

authors： Marin-Neto JA,Dilsizian V,Arrighi JA,Freedman NM,Perrone-Filardi P,Bacharach SL,Bonow RO

更新日期：1993-10-01 00:00:00

abstract：BACKGROUND:In recent decades, the rates of incident acute myocardial infarction (AMI) have declined in the United States, yet disparities by sex remain. In an integrated healthcare delivery system, we examined temporal trends in incident AMI among women and men. METHODS:We identified hospitalized AMI among members ≥35...

journal_title：Circulation

authors： Mefford MT,Li BH,Qian L,Reading SR,Harrison TN,Scott RD,Cavendish JJ,Jacobsen SJ,Kanter MH,Woodward M,Reynolds K

更新日期：2020-02-18 00:00:00

abstract：:Syncope and sudden death occurs in certain purebred Pug dogs which have been found to have intermittent sinus pauses and paroxysmal second degree heart block on electrocardiographic (ECG) study. We have established a colony of such dogs to study this problem and here report the results of histological examination of t...

journal_title：Circulation

authors： James TN,Robertson BT,Waldo AL,Branch CE

更新日期：1975-12-01 00:00:00

abstract：BACKGROUND:MRI of specific components in atherosclerotic plaque may provide information on plaque stability and its potential to rupture. We evaluated gadofluorine in atherosclerotic rabbits using a new MR sequence that allows plaque detection within 1 hour after injection and assessed enhancement in lipid-rich and non...

journal_title：Circulation

authors： Sirol M,Itskovich VV,Mani V,Aguinaldo JG,Fallon JT,Misselwitz B,Weinmann HJ,Fuster V,Toussaint JF,Fayad ZA

更新日期：2004-06-15 00:00:00

abstract：:Numerous criteria for the diagnosis of inferior wall myocardial infarction by electrocardiogram (ECG) and vectorcardiogram (VCG) have been published, but they have not been subjected to a systematic, independent evaluation. Accordingly, we studied 146 patients undergoing cardiac catheterization; 63 were normal and 83 ...

journal_title：Circulation

authors： Hurd HP 2nd,Starling MR,Crawford MH,Dlabal PW,O'Rourke RA

更新日期：1981-05-01 00:00:00

abstract：:The release of the American Heart Association's 2030 Impact Goal and associated metrics for success underscores the importance of cardiovascular health and cardiovascular disease surveillance systems for the acquisition of information sufficient to support implementation and evaluation. The aim of this policy statemen...

journal_title：Circulation

authors： Roger VL,Sidney S,Fairchild AL,Howard VJ,Labarthe DR,Shay CM,Tiner AC,Whitsel LP,Rosamond WD,American Heart Association Advocacy Coordinating Committee.

更新日期：2020-03-03 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