Mitochondrial Dysfunction in Heart Failure With Preserved Ejection Fraction.

abstract：:Background-Endocardial (EE) and myocardial capillary vascular endothelial (myocap VE) cells have been shown to modulate the contractile characteristics of myocardium in a calcium-dependent manner. We evaluated the endothelial-myocardial interaction in the rat postinfarction myocardial infarction (MI) model and the eff...

journal_title：Circulation

authors： Qi XL,Stewart DJ,Gosselin H,Azad A,Picard P,Andries L,Sys SU,Brutsaert DL,Rouleau JL

更新日期：1999-09-21 00:00:00

abstract：:The elevated blood pressure and vascular resistance in patients with systemic hypertension are paralleled by a proportional rise in pressure and resistance in the lesser circulation. We evaluated the hypothesis that the increased systemic reaction to adrenergic stimulation is shared by the pulmonary vessels. For this ...

journal_title：Circulation

authors： Guazzi MD,De Cesare N,Fiorentini C,Galli C,Moruzzi P,Tamborini G

更新日期：1987-01-01 00:00:00

abstract：:Coronary occlusion in the dog results in irreversible myocardial cell injury which develops first in subendocardial areas of severe ischemica and subsequently spreads into mid and subepicardial areas of moderate ischemia. The effect of propranolol on this progression of ischemic injury was evaluated. Three groups of d...

journal_title：Circulation

authors： Rasmussen MM,Reimer KA,Kloner RA,Jennings RB

更新日期：1977-11-01 00:00:00

abstract：:Identification of regional myocardial ischemia by TQ-ST segment mapping, while commonly used, is relatively imprecise and nonspecific. In 41 open-chest dogs we examined whether monophasic action potentials (MAPs) recorded from the myocardial surface by means of a new contact-electrode technique could be used to more p...

journal_title：Circulation

authors： Franz MR,Flaherty JT,Platia EV,Bulkley BH,Weisfeldt ML

更新日期：1984-03-01 00:00:00

abstract：BACKGROUND:Heparin administration is usually limited to intravenous or subcutaneous injection. Oral delivery of heparin is an alternative to this and has been in great demand for treating patients who are at a high risk of deep vein thrombosis or pulmonary embolism. In this study, new heparin derivatives were synthesiz...

journal_title：Circulation

authors： Lee Y,Nam JH,Shin HC,Byun Y

更新日期：2001-12-18 00:00:00

abstract：BACKGROUND:Whether and to what extent complement is activated in acute myocardial infarction (AMI) and how it contributes to inflammation of the ischemic area are not yet clear. Fibrinolytic agents used for thrombolysis are known to activate complement in vitro and may contribute to its activation in vivo. The aim of t...

journal_title：Circulation

authors： Frangi D,Gardinali M,Conciato L,Cafaro C,Pozzoni L,Agostoni A

更新日期：1994-01-01 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：: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：:Although laparoscopic surgery accounts for >2 million surgical procedures every year, the current preoperative risk scores and guidelines do not adequately assess the risks of laparoscopy. In general, laparoscopic procedures have a lower risk of morbidity and mortality compared with operations requiring a midline lapa...

journal_title：Circulation

authors： Atkinson TM,Giraud GD,Togioka BM,Jones DB,Cigarroa JE

更新日期：2017-02-14 00:00:00

abstract：BACKGROUND:Previous studies have shown that thrombin is a potent though slow-acting mitogen for vascular smooth muscle cells (SMC). Because thrombin generation in vivo is accompanied by platelet activation, it has been suggested that platelet-derived factors might enhance thrombin-induced SMC proliferation. No informat...

journal_title：Circulation

authors： Zucker TP,Bönisch D,Muck S,Weber AA,Bretschneider E,Glusa E,Schrör K

更新日期：1998-02-17 00:00:00

abstract：BACKGROUND:Recent studies clearly suggest that regulatory T cells play a critical role in the control of the immunoinflammatory response in atherosclerosis and substantially limit lesion development. Measles virus infection or vaccination is associated with immune depression, in part through the induction of an antiinf...

journal_title：Circulation

authors： Ait-Oufella H,Horvat B,Kerdiles Y,Herbin O,Gourdy P,Khallou-Laschet J,Merval R,Esposito B,Tedgui A,Mallat Z

更新日期：2007-10-09 00:00:00

abstract：BACKGROUND:Atherosclerosis is a systemic disease that underlies clinical cardiovascular disease. The radiographic finding of abdominal aortic calcific deposits is an indicator of the presence of aortic atherosclerosis and an independent predictor of cardiovascular disease events. Little is known about the heritability ...

journal_title：Circulation

authors： O'Donnell CJ,Chazaro I,Wilson PW,Fox C,Hannan MT,Kiel DP,Cupples LA

更新日期：2002-07-16 00:00:00

abstract：BACKGROUND:Our aim was to compare the electron-beam CT (EBCT) features of coronary arteries in heart transplant recipients with those of biplane coronary angiography and intracoronary ultrasound (ICUS). METHODS AND RESULTS:We examined 112 heart transplant recipients (25 female; age, 17 to 69 years; median, 52 years) 1...

journal_title：Circulation

authors： Knollmann FD,Bocksch W,Spiegelsberger S,Hetzer R,Felix R,Hummel M

更新日期：2000-05-02 00:00:00

abstract：:The amplitude and distribution of epicardial ST-segment elevation (ST) were examined for an 8-hour period after coronary occlusion in eight baboons and five pigs. ST was determined from unipolar epicardial electrograms obtained from a high-resolution matrix of fixed electrodes overlying a transmural region of ischemia...

journal_title：Circulation

authors： Smith GT,Geary G,Ruf W,Roelofs TH,McNamara JJ

更新日期：1979-10-01 00:00:00

abstract：BACKGROUND:In essential hypertension, endothelium-dependent vasodilation is impaired because of reduced nitric oxide (NO) availability, which is mainly caused by oxidative stress. The present study was designed to identify the mechanism(s) responsible for NO-independent vasodilation to bradykinin in patients with essen...

journal_title：Circulation

authors： Taddei S,Ghiadoni L,Virdis A,Buralli S,Salvetti A

更新日期：1999-09-28 00:00:00

abstract：:We studied six patients who suffered from angina pectoris but had angiographically patent major coronary arteries. Two of the patients suffered also from congestive heart failure. Three patients had supraventricular tachyarrhythmias. Three patients had conduction disturbances. During coronary angiography the patients ...

journal_title：Circulation

authors： Mosseri M,Yarom R,Gotsman MS,Hasin Y

更新日期：1986-11-01 00:00:00

abstract：BACKGROUND:Myocardial perfusion during adenosine-induced hyperemia is used both in clinical diagnosis of coronary heart disease and for scientific investigations of the myocardial microcirculation. The objective of this study was to clarify whether adenosine-induced hyperemia is dependent on endothelial NO production o...

journal_title：Circulation

authors： Buus NH,Bøttcher M,Hermansen F,Sander M,Nielsen TT,Mulvany MJ

更新日期：2001-11-06 00:00:00

abstract：BACKGROUND:Chronic heart failure is associated with endothelial dysfunction including impaired endothelium-mediated, flow-dependent dilation (FDD). Since endothelial function is thought to play an important role in coordinating tissue perfusion and modulating arterial compliance, interventions to improve endothelial dy...

journal_title：Circulation

authors： Hornig B,Maier V,Drexler H

更新日期：1996-01-15 00:00:00

abstract：BACKGROUND:The left ventricular (LV) dilatation of isolated mitral regurgitation (MR) is associated with an increase in chymase and a decrease in interstitial collagen and extracellular matrix. In addition to profibrotic effects, chymase has significant antifibrotic actions because it activates matrix metalloproteinase...

journal_title：Circulation

authors： Pat B,Chen Y,Killingsworth C,Gladden JD,Shi K,Zheng J,Powell PC,Walcott G,Ahmed MI,Gupta H,Desai R,Wei CC,Hase N,Kobayashi T,Sabri A,Granzier H,Denney T,Tillson M,Dillon AR,Husain A,Dell'italia LJ

更新日期：2010-10-12 00:00:00

abstract：BACKGROUND:Pulmonary hypertension (PH) is a life-threatening disorder characterized by increased pulmonary artery pressure, remodeling of the pulmonary vasculature, and right ventricular failure. Loss of endothelium-derived nitric oxide (NO) and prostacyclin contributes to PH pathogenesis, and current therapies are tar...

journal_title：Circulation

authors： Bubb KJ,Trinder SL,Baliga RS,Patel J,Clapp LH,MacAllister RJ,Hobbs AJ

更新日期：2014-08-05 00:00:00

abstract：BACKGROUND:Pulmonary regurgitation frequently occurs after surgical correction of tetralogy of Fallot. To date, reliable quantitation of pulmonary regurgitation has not been possible, and therefore the clinical significance of pulmonary regurgitation is controversial. Nuclear magnetic resonance (NMR) velocity mapping a...

journal_title：Circulation

authors： Rebergen SA,Chin JG,Ottenkamp J,van der Wall EE,de Roos A

更新日期：1993-11-01 00:00:00

abstract：:Myocardial ischemia has, for many decades, been viewed as an all-or-none process that causes myocardial necrosis when prolonged and severe, but whose effects are transient when it is brief or mild. In view of the evidence that the ischemic process may "hit, run and stun," perhaps our thinking about the consequences of...

journal_title：Circulation

authors： Braunwald E,Kloner RA

更新日期：1982-12-01 00:00:00

abstract：:To determine whether alteration of intrinsic myocardial stiffness is responsible for the reduction of left ventricular filling pressure and volume by nifedipine in patients with impaired baseline ventricular function, we evaluated the hemodynamic responses in 32 patients undergoing diagnostic cardiac catheterization. ...

journal_title：Circulation

authors： Kurnik PB,Courtois MR,Ludbrook PA

更新日期：1986-07-01 00:00:00

abstract：BACKGROUND:Contrary to expectation, most studies have demonstrated that initiation of an angiotensin-converting enzyme (ACE) inhibitor in conventional doses in patients with heart failure reduces the diuretic efficacy of furosemide. Recently, it has been suggested that single low doses (1 mg) but not high doses (25 mg)...

journal_title：Circulation

authors： Good JM,Brady AJ,Noormohamed FH,Oakley CM,Cleland JG

更新日期：1994-07-01 00:00:00

abstract：BACKGROUND:Single premature beats were introduced in the reentrant circuit during stable atrial flutter in the canine sterile pericarditis model to test the hypotheses that (1) despite the fact that the reentrant circuit is functionally determined, there is a fully excitable gap; (2) the excitable gap in the reentrant ...

journal_title：Circulation

authors： Niwano S,Ortiz J,Abe H,Gonzalez X,Rudy Y,Waldo AL

更新日期：1994-10-01 00:00:00

abstract：BACKGROUND:The identification of sites of dominant activation frequency during atrial fibrillation (AF) in humans and the effect of ablation at these sites have not been reported. METHODS AND RESULTS:Thirty-two patients undergoing AF ablation (19 paroxysmal, 13 permanent) during ongoing arrhythmia were studied. Electr...

journal_title：Circulation

authors： Sanders P,Berenfeld O,Hocini M,Jaïs P,Vaidyanathan R,Hsu LF,Garrigue S,Takahashi Y,Rotter M,Sacher F,Scavée C,Ploutz-Snyder R,Jalife J,Haïssaguerre M

更新日期：2005-08-09 00:00:00

abstract：BACKGROUND:Although angina is often caused by atherosclerotic obstruction of the coronary arteries, patients with similar amounts of myocardial ischemia may vary widely in their symptoms. We sought to compare clinical and psychosocial characteristics associated with more frequent angina after adjusting for the amount o...

journal_title：Circulation

authors： Arnold SV,Spertus JA,Ciechanowski PS,Soine LA,Jordan-Keith K,Caldwell JH,Sullivan MD

更新日期：2009-07-14 00:00:00

abstract：BACKGROUND:Cardiac effects of hypertension include increased left ventricular (LV) mass and LV hypertrophy, as well as increased left atrial size, a predictor of stroke and atrial fibrillation. Although literature on reduction of LV mass with antihypertensive therapy is extensive, little information is available on eff...

journal_title：Circulation

authors： Gottdiener JS,Reda DJ,Williams DW,Materson BJ,Cushman W,Anderson RJ

更新日期：1998-07-14 00:00:00

abstract：:To investigate the electrocardiographic and hemodynamic changes in isolated right ventricular infarction, 0.25 ml or 0.5 ml of metallic mercury was injected into the right coronary artery of 14 closed-chest dogs. At autopsy, at least 60% of the right ventricle was necrotic in every dog. Hemodynamic observations were m...

journal_title：Circulation

authors： Chou TC,Fowler NO,Gabel M,van der Bel-Kahn J,Feltner EJ

更新日期：1983-06-01 00:00:00

abstract：BACKGROUND:The quantity and intensity of physical activity required for the primary prevention of coronary heart disease (CHD) remain unclear. Therefore, we examined the association of the quantity and intensity of physical activity with CHD risk and the impact of other coronary risk factors. METHODS AND RESULTS:We fo...

journal_title：Circulation

authors： Sesso HD,Paffenbarger RS Jr,Lee IM

更新日期：2000-08-29 00:00:00