Congenital abnormalities of the conduction system in two patients with tachyarrhythmias.

abstract：BACKGROUND:A robotic catheter navigation system has been developed that provides a significant degree of freedom of catheter movement. This study examines the feasibility of synchronizing this robotic navigation system with electroanatomic mapping and 3-dimensional computed tomography imaging to perform view-synchroniz...

journal_title：Circulation

authors： Reddy VY,Neuzil P,Malchano ZJ,Vijaykumar R,Cury R,Abbara S,Weichet J,McPherson CD,Ruskin JN

更新日期：2007-05-29 00:00:00

abstract：BACKGROUND:Multicomponent atrial electrograms and "slow pathway potentials" are helpful in identifying target sites for radiofrequency catheter ablation of the slow pathway in patients with atrioventricular (AV) nodal reentrant tachycardia. The purpose of this study was to compare the atrial electrograms recorded at va...

journal_title：Circulation

authors： Niebauer MJ,Daoud E,Williamson B,Man KC,Strickberger A,Hummel J,Morady F

更新日期：1995-07-01 00:00:00

abstract：:In 69 patients undergoing coronary artery bypass grafting for complete coronary revascularization, blood flow was measured in 140 grafts with 243 distal anastomoses (3.52 bypasses/patient). Total blood flow in single grafts and double and triple sequential grafts did not differ significantly, although mean distal flow...

journal_title：Circulation

authors： McNamara JJ,Bjerke HS,Chung GK,Dang CR

更新日期：1979-08-01 00:00:00

abstract：BACKGROUND:Brain natriuretic peptide (BNP) levels are used in the evaluation of patients with heart disease, yet there is little understanding of the effect of hypoxia on natriuretic peptide secretion. Furthermore, recent data suggest that oxytocin may mediate stretch-induced atrial natriuretic peptide (ANP) secretion....

journal_title：Circulation

authors： Hopkins WE,Chen Z,Fukagawa NK,Hall C,Knot HJ,LeWinter MM

更新日期：2004-06-15 00:00:00

abstract：BACKGROUND:Lead V(1) directly faces the right ventricle and may exhibit ST elevation during an acute inferior myocardial infarction when the right ventricle is also involved. Leads V(1) and V(3) indirectly face the posterolateral left ventricle, and ST depression ("mirror-image" ST elevation) in V(1) through V(3) may r...

journal_title：Circulation

authors： Wong CK,Gao W,Stewart RA,French JK,Aylward PE,Benatar J,White HD,Hirulog and Early Reperfusion or Occlusion-2 Investigators.

更新日期：2010-08-03 00:00:00

abstract：BACKGROUND:Giant cell myocarditis (GCM) typically causes fulminant heart failure, arrhythmias, or heart block, necessitating aggressive immunosuppression, ventricular assist device insertion, or cardiac transplantation. We describe a novel variant of GCM, primarily involving the atria, that displays distinctive clinica...

journal_title：Circulation

authors： Larsen BT,Maleszewski JJ,Edwards WD,Cooper LT Jr,Sobonya RE,Thompson VE,Duckett SG,Peebles CR,Simpson IA,Tazelaar HD

更新日期：2013-01-01 00:00:00

abstract：BACKGROUND:Dilated cardiomyopathy is an important cause of morbidity and mortality among patients with congestive heart failure. Hemodynamic and prognostic characterization are critical in guiding selection of medical and surgical therapies. METHODS AND RESULTS:A cohort of 102 patients with the clinical diagnosis of d...

journal_title：Circulation

authors： Rihal CS,Nishimura RA,Hatle LK,Bailey KR,Tajik AJ

更新日期：1994-12-01 00:00:00

abstract：:Factors related to late narrowing of aortocoronary vein grafts are poorly understood. Repeat aortocoronary bypass graft angiography was performed in 34 patients at 13 +/- 5 months and 61 +/- 13 months after surgery. In these patients, 61 of 65 grafts (94%) were patent at 1 year; at 5 years, 39 of these patent grafts (...

journal_title：Circulation

authors： Palac RT,Meadows WR,Hwang MH,Loeb HS,Pifarre R,Gunnar RM

更新日期：1982-08-01 00:00:00

abstract：BACKGROUND:Magnetic resonance (MR) phase-shift velocity mapping is an established method for measurement of nonturbulent intravascular flow. Shortening the echo time of the MR sequence to 3.6 msec allowed application of the technique to turbulent jet flow. The objective of this study was validation of MR jet velocity m...

journal_title：Circulation

authors： Kilner PJ,Manzara CC,Mohiaddin RH,Pennell DJ,Sutton MG,Firmin DN,Underwood SR,Longmore DB

更新日期：1993-04-01 00:00:00

abstract：BACKGROUND:The present study investigated whether the ACAT inhibitor avasimibe can reduce atherogenesis independently of its cholesterol-lowering effect in ApoE*3-Leiden mice. METHODS AND RESULTS:Two groups of 15 female ApoE*3-Leiden mice were put on a high-cholesterol (HC) diet; 1 group received 0.01% (wt/wt) avasimi...

journal_title：Circulation

authors： Delsing DJ,Offerman EH,van Duyvenvoorde W,van Der Boom H,de Wit EC,Gijbels MJ,van Der Laarse A,Jukema JW,Havekes LM,Princen HM

更新日期：2001-04-03 00:00:00

abstract：:The first stage of a repair of pulmonary atresia with intact ventricular septum (type I) was attempted in a 2-day-old infant. At surgery, decompression of the hypertensive small right ventricle was followed by a sudden loss of myocardial contractility and death. Postmortem examination revealed a fistula with a large o...

journal_title：Circulation

authors： O'Connor WN,Cottrill CM,Johnson GL,Noonan JA,Todd EP

更新日期：1982-04-01 00:00:00

abstract：:Medical treatment of heart disease has improved significantly in the past 30 years. The spectacular change in the natural history of rheumatic heart disease is apparent from a 1948 article that reported that 42% of children with rheumatic heart disease died of rheumatic infection or bacterial endocarditis. Antibiotics...

journal_title：Circulation

authors： Ross RS

更新日期：1979-12-01 00:00:00

abstract：BACKGROUND:Chronic orthostatic intolerance (OI) is characterized by symptoms of inadequate cerebral perfusion with standing, in the absence of significant orthostatic hypotension. A heart rate increase of >/=30 bpm is typical. Possible underlying pathophysiologies include hypovolemia, partial dysautonomia, or a primary...

journal_title：Circulation

authors： Jacob G,Shannon JR,Costa F,Furlan R,Biaggioni I,Mosqueda-Garcia R,Robertson RM,Robertson D

更新日期：1999-04-06 00:00:00

abstract：BACKGROUND:Reports on outcome after the Ross procedure are limited by small study size and show variable durability results. A systematic review of evidence on outcome after the Ross procedure may improve insight into outcome and potential determinants. METHODS AND RESULTS:A systematic review of reports published from...

journal_title：Circulation

authors： Takkenberg JJ,Klieverik LM,Schoof PH,van Suylen RJ,van Herwerden LA,Zondervan PE,Roos-Hesselink JW,Eijkemans MJ,Yacoub MH,Bogers AJ

更新日期：2009-01-20 00:00:00

abstract：BACKGROUND:Elevated levels of high-sensitivity C-reactive protein (hsCRP) are associated with higher risk of adverse outcomes in patients at risk for or with established coronary artery disease. Retrospective analyses suggest that this risk may be modified with statin therapy. However, a role for hsCRP in monitoring th...

journal_title：Circulation

authors： Morrow DA,de Lemos JA,Sabatine MS,Wiviott SD,Blazing MA,Shui A,Rifai N,Califf RM,Braunwald E

更新日期：2006-07-25 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：:Thirty patients with triple-vessel coronary artery disease proven by angiography, symptomatic angina and a positive ECG stress test were evaluated with thallium-201 (201TI) scintigraphy. Twenty patients also had aortocoronary saphenous vein bypass surgery; 15 of them had repeat noninvasive evaluation. Seventy percent ...

journal_title：Circulation

authors： Leppo J,Yipintsoi T,Blankstein R,Bontemps R,Freeman LM,Zohman L,Scheuer J

更新日期：1979-04-01 00:00:00

abstract：BACKGROUND:Intracoronary radiotherapy (brachytherapy) has been proposed as treatment option for in-stent restenosis. Long-term results of brachytherapy with regard to vascular integrity and vasomotor responsiveness are unknown. The purpose of the present study was to determine the vasomotor response after brachytherapy...

journal_title：Circulation

authors： Togni M,Windecker S,Wenaweser P,Tueller D,Kaisaier A,Maier W,Meier B,Hess OM

更新日期：2004-07-13 00:00:00

abstract：BACKGROUND:During ischemia, the intracellular calcium and inorganic phosphate (P(i)) concentrations rise and pH falls. We investigated the effects of these changes on force development in donor and failing human hearts to determine if altered contractile protein composition during heart failure changes the myocardial r...

journal_title：Circulation

authors： van Der Velden J,Klein LJ,Zaremba R,Boontje NM,Huybregts MA,Stooker W,Eijsman L,de Jong JW,Visser CA,Visser FC,Stienen GJ

更新日期：2001-09-04 00:00:00

abstract：:Trapidil (triazolopyrimidine) possesses activity against platelet-derived growth factor-induced cellular proliferation in vitro and intimal proliferation in vivo. The objective of this study was to determine if trapidil could prevent restenosis in experimentally induced atherosclerotic rabbits. New Zealand White rabbi...

journal_title：Circulation

authors： Liu MW,Roubin GS,Robinson KA,Black AJ,Hearn JA,Siegel RJ,King SB 3rd

更新日期：1990-03-01 00:00:00

abstract：:Patients with DDD pacemakers who have intact retrograde conduction are known to be at risk of developing ventricular and "endless loop" tachycardia. To address this problem, a pacing protocol was designed in which V2A2 conduction was assessed in 16 patients during ventricular pacing alone (standard method) and during ...

journal_title：Circulation

authors： Mahmud R,Lehmann M,Denker S,Gilbert CJ,Akhtar M

更新日期：1983-07-01 00:00:00

abstract：:Platelets labeled with indium-111 have been used successfully as a marker of active thrombosis in man. To establish the diagnostic accuracy of platelet scintigraphy in comparison to contrast venography in the diagnosis of acute lower limb venous thrombosis, we evaluated 103 consecutive patients divided into two groups...

journal_title：Circulation

authors： Ezekowitz MD,Pope CF,Sostman HD,Smith EO,Glickman M,Rapoport S,Sniderman KW,Friedlaender G,Pelker RR,Taylor FB

更新日期：1986-04-01 00:00:00

abstract：BACKGROUND:Specific transcription factors (TFs) modulate cardiac gene expression in murine models of heart failure, but their relevance in human subjects remains untested. We developed and applied a computational approach called transcriptional genomics to test the hypothesis that a discrete set of cardiac TFs is assoc...

journal_title：Circulation

authors： Hannenhalli S,Putt ME,Gilmore JM,Wang J,Parmacek MS,Epstein JA,Morrisey EE,Margulies KB,Cappola TP

更新日期：2006-09-19 00:00:00

abstract：BACKGROUND:We have reported that myocardial ischemia increases nitric oxide (NO) production. Several lines of evidence suggest that NO reduces myocardial contraction. Therefore, we tested whether endogenous NO decreases the inotropic response of the ischemic myocardium and whether endogenous NO is beneficial in the met...

journal_title：Circulation

authors： Node K,Kitakaze M,Kosaka H,Komamura K,Minamino T,Inoue M,Tada M,Hori M,Kamada T

更新日期：1996-01-15 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：BACKGROUND:We investigated whether L-arginine induces regression of preexisting atheromatous lesions and reversal of endothelial dysfunction in hypercholesterolemic rabbits, whether similar effects can be obtained by cholesterol-lowering therapy with lovastatin, and which mechanism leads to these effects. METHODS AND ...

journal_title：Circulation

authors： Böger RH,Bode-Böger SM,Brandes RP,Phivthong-ngam L,Böhme M,Nafe R,Mügge A,Frölich JC

更新日期：1997-08-19 00:00:00

abstract：BACKGROUND:In humans, angiotensin converting enzyme (ACE) inhibition attenuates the vasoconstriction induced by sympathetic stimulation in a number of peripheral districts. Whether this is also the case in the coronary circulation is unknown, however. METHODS AND RESULTS:In nine normotensive patients with angiographic...

journal_title：Circulation

authors： Perondi R,Saino A,Tio RA,Pomidossi G,Gregorini L,Alessio P,Morganti A,Zanchetti A,Mancia G

更新日期：1992-06-01 00:00:00

abstract：BACKGROUND:Although molecular biological studies suggest a pathogenic link between enterovirus infection and dilated cardiomyopathy (DCM), the frequency of detection of enteroviral RNA is not consistently high in myocardial tissue from patients with DCM. A recent study has suggested that hepatitis C virus (HCV) may als...

journal_title：Circulation

authors： Okabe M,Fukuda K,Arakawa K,Kikuchi M

更新日期：1997-07-01 00:00:00

abstract：BACKGROUND:Ischemic preconditioning attenuates the effects of subsequent sustained ischemia by a mechanism involving adenosine and G proteins in several species. Adenosine is not involved in ischemic preconditioning of rat hearts, the mechanisms of which are poorly understood. METHODS AND RESULTS:Reduction of isometri...

journal_title：Circulation

authors： Hu K,Nattel S

更新日期：1995-10-15 00:00:00

abstract：BACKGROUND:It is uncertain whether Helicobacter pylori is associated with ischemic syndromes and whether this association is mediated by the induction of atherosclerosis. In this study, we tested the hypothesis that atherosclerotic stroke shows a selective association with virulent H pylori strains. METHODS AND RESULT...

journal_title：Circulation

authors： Pietroiusti A,Diomedi M,Silvestrini M,Cupini LM,Luzzi I,Gomez-Miguel MJ,Bergamaschi A,Magrini A,Carrabs T,Vellini M,Galante A

更新日期：2002-07-30 00:00:00