Abstract:
:The effect of neurogenic coronary vasomotor tone upon contraction in ischemic myocardium was investigated in awake, mongrel dogs. The animals were chronically instrumented with a hydraulic occluder around the left circumflex coronary artery; a small catheter was also implanted within the vessel. Ultra-sound crystal pairs were placed distal to the occluder in myocardium perfused by the left circumflex artery. Pacing electrodes were sutured onto the right ventricular conus. During the experiment (n = 6) the occluder was inflated to stenose the vessel; the imposition of cardiac pacing (210/min) in conjunction with this stenosis resulted in depressed contraction of the myocardium distal to the occluder as assessed by the ultra-sound crystals: Segmental shortening decreased to 45.4 +/- 5.4% of unpaced control. Phentolamine, an alpha-antagonist, was then infused into the left circumflex catheter for ten minutes (0.1 mg/min) and the experiment repeated. After the alpha-blockade the combination of coronary stenosis and heart rate pacing decreased segmental shortening to only 84.6 +/- 10.1% of control, which was significantly (P less than 0.01) improved relative to the unblocked condition. In another experiment (n = 4), a less severe stenosis was imposed upon the left circumflex vessel. During pacing, muscle shortening decreased to 94 +/- 8.5% of control. Infusion of phenylephrine, an alpha-agonist, for ten minutes (0.1 mg/min) resulted in a 56.7 +/- 5.9% decrease in shortening during pacing; this was significantly greater (P less than 0.01) than the previous decrease. These data indicate that coronary alpha-adrenergic tone can significantly compromise regional myocardial function even in ischemic muscle whose coronary blood flow reserve has been exhausted.
journal_name
Int J Cardioljournal_title
International journal of cardiologyauthors
Vallance SR,Randall DC,Yingling JDdoi
10.1016/0167-5273(90)90085-jsubject
Has Abstractpub_date
1990-03-01 00:00:00pages
291-302issue
3eissn
0167-5273issn
1874-1754pii
0167-5273(90)90085-Jjournal_volume
26pub_type
杂志文章abstract:BACKGROUND:Atrial function is an integral part of cardiac function which is often neglected. The presence of coronary artery disease (CAD) may impair atrial function. This study investigated if atrial mechanical dysfunction was present in patients with CAD by tissue Doppler echocardiography (TDI). METHODS:Echocardiogr...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2004.12.077
更新日期:2005-11-02 00:00:00
abstract:BACKGROUND:Heart failure (HF) is increasingly common and characterised by frequent admissions to hospital. To reduce the risk of HF hospitalisation (HFH), approaches as telemonitoring (TM) have been introduced. This study aimed to develop an algorithm for detecting patients at high risk of HFH, using daily collected ph...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.04.149
更新日期:2016-08-01 00:00:00
abstract:BACKGROUND:The American Heart Association's 2020 Strategic Goals have defined a new concept of cardiovascular health for adults and children, emphasizing the importance of primordial prevention of cardiovascular diseases. However, detailed data on the trends of ideal cardiovascular health in Chinese children and adoles...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.12.027
更新日期:2017-03-15 00:00:00
abstract:BACKGROUND:Excessive degradation of extracellular matrix by matrix metalloproteinases (MMP) is the major pathological feature of abdominal aortic aneurysm (AAA). Suppression of extracellular matrix degradation attenuates AAA initiation and progression in preclinical models. In the present study, we wanted to test the e...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.08.238
更新日期:2016-11-15 00:00:00
abstract:INTRODUCTION:The purpose of this study was to investigate the accuracy of qualitative stress perfusion cardiac magnetic resonance (CMR) to diagnose ischemia-causing lesions according to different definitions of significant coronary artery disease (CAD), and magnetic field strength. METHODS:We searched PubMed, Web of S...
journal_title:International journal of cardiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ijcard.2017.11.066
更新日期:2018-02-01 00:00:00
abstract::We studied the prognostic relevance of inducible ventricular tachycardia in 32 patients with dilated cardiomyopathy and spontaneous nonsustained asymptomatic ventricular tachycardia. Programmed ventricular stimulation included basic drive cycle lengths of 600, 500, 430, 370, 330 and 300 msec at single, double, and tri...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(90)90224-s
更新日期:1990-11-01 00:00:00
abstract:BACKGROUND:No five-year long-term follow-up data is available regarding the prognostic value of GDF-15. Our aim is to evaluate the long-term prognostic value of admission growth-differentiation factor 15 (GDF-15) regarding death or myocardial infarction (MI) in patients with non-ST-elevation acute coronary syndrome (NS...
journal_title:International journal of cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.ijcard.2014.01.025
更新日期:2014-03-15 00:00:00
abstract:AIM:To assess the prevalence of suboptimal bioresorbable vascular scaffold (BVS, Abbott Vascular, Santa Clara, California) deployment in real world practice with intracoronary optical coherence tomography (OCT) imaging. METHODS:Consecutive patients who underwent percutaneous coronary intervention using BVS and the fin...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.06.096
更新日期:2016-10-01 00:00:00
abstract:BACKGROUND:Hypertension is a major cause of cardiovascular disease. Periodic nationwide surveys are essential for monitoring secular trend of hypertension and its control in population. We assessed prevalence of hypertension and related awareness, treatment and control rates in Chinese adults in 2013-14. METHODS:A nat...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.10.110
更新日期:2017-01-15 00:00:00
abstract::Changes of both central hemodynamics and peripheral circulation in non-exercising muscle were investigated in 17 patients after successful orthotopic heart transplantation during moderate supine isotonic leg-exercise. Changes of peripheral circulation were measured in 14 healthy controls. The cardiac output rose from ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(94)90288-7
更新日期:1994-05-01 00:00:00
abstract:BACKGROUND:It is well known that cardiac rehabilitation (CR) including regular exercise training (ET) is cardioprotective with respect to clinical events in patients with acute myocardial infarction (AMI). However, it is not known whether the regular ET may affect coronary restenosis after percutaneous coronary interve...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2012.06.122
更新日期:2013-09-10 00:00:00
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journal_title:International journal of cardiology
pub_type: 信件
doi:10.1016/j.ijcard.2005.11.048
更新日期:2006-08-10 00:00:00
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journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2004.02.015
更新日期:2005-03-30 00:00:00
abstract::In conclusion, the data shows that in excellent quality studies such as those obtained in vitro, 3D echocardiography is as accurate in describing the volume of the left ventricle as is angiography. When excellent quality images are obtained, the endocardial wall motion, wall thickening and thinning are better describe...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(85)90180-9
更新日期:1985-01-01 00:00:00
abstract::A 25-year-old woman was admitted to our center for left heart failure. The clinical, electrocardiographic and bioptic findings suggested an acute lymphocytic myocarditis. One month later, paroxysmal hypertension and high urinary excretion of noradrenaline revealed the presence of a pheochromocytoma. ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/s0167-5273(98)00118-1
更新日期:1998-08-01 00:00:00
abstract:OBJECTIVES:Recent data indicate that hypertension is not well controlled in many populations throughout the world. The factors that influence individual response to anti-hypertensive treatment need to be clarified. Pulse wave velocity (PWV), as a marker of arterial stiffness, has been demonstrated to have important rel...
journal_title:International journal of cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.ijcard.2014.10.049
更新日期:2015-01-15 00:00:00
abstract:BACKGROUND:The purpose of this study was to evaluate prospectively the safety and efficacy of bovine thrombin injection for the treatment of iatrogenic post-catheterisation pseudoaneurysms. METHODS AND RESULTS:A total of 274 patients (90 women, 184 men, 69.8+/-7 years) with iatrogenic femoral pseudoaneurysms were trea...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2007.10.052
更新日期:2009-01-24 00:00:00
abstract::Coronary artery infection after angioplasty or stent implantation is a rare and dreaded complication of percutaneous coronary intervention. 80% of the cases are due to Staphylococcus aureus. About half the cases lead to rupture or perforation of the coronary artery while the other half presents as abscesses or aneurys...
journal_title:International journal of cardiology
pub_type: 信件
doi:10.1016/j.ijcard.2008.12.106
更新日期:2010-10-08 00:00:00
abstract::A 15-year-old patient is presented with parasystolic ventricular tachycardia which was responsive to oral verapamil. We emphasize the value of verapamil in the treatment of this uncommon arrhythmia. ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/0167-5273(87)90300-7
更新日期:1987-04-01 00:00:00
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journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2014.03.022
更新日期:2014-05-01 00:00:00
abstract:AIMS:This study sought to identify the prevalence of risk factors for atrial fibrillation and stroke in a sleep apnea population. METHODS:Study participants included 1210 consecutive adults who were referred with suspicion of sleep apnea. Statistical analysis was used to determine the relationship between sleep apnea ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2014.03.156
更新日期:2014-06-01 00:00:00
abstract::A 29-yr-old patient is described, who presented with rapid general deterioration and right heart failure. Two-dimensional echocardiography revealed massive intracardiac tumor involving the right atrium, the right ventricle and the left atrium. At histology the diagnosis of Burkitt's lymphoma was made. This report pres...
journal_title:International journal of cardiology
pub_type: 杂志文章,评审
doi:10.1016/0167-5273(92)90277-a
更新日期:1992-12-01 00:00:00
abstract:BACKGROUND:Oral anticoagulant therapy is central to the prevention thromboembolic events in atrial fibrillation (AF) patients. The SAMe-TT2R2 score is a simple clinical-derived score designed to aid decision-making on whether or not a patient is likely to achieve good anticoagulation control on vitamin K Antagonists (V...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2016.04.131
更新日期:2016-08-01 00:00:00
abstract:UNLABELLED:Left atrial volume index (LAVI) as a predictor of mortality has not been well investigated in patients with cardiac resynchronization therapy (CRT). The purpose of this study is to evaluate the impact of LAVI in predicting mortality in CRT patients. METHODS:We studied 100 consecutive patients who received C...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2010.06.016
更新日期:2011-10-06 00:00:00
abstract:BACKGROUND:VDD pacemakers are regarded as a second choice in patients with atrio-ventricular blocks mainly due to the potential failure of atrial sensing, leading to a loss of atrio-ventricular synchrony. This single-centre study aimed to evaluate the prevalence of loss of atrial sensing and its potential determinants ...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2020.09.063
更新日期:2020-09-26 00:00:00
abstract:BACKGROUND:Although good prognosis and clinical long-term outcome have been commonly reported in minimally symptomatic adult patients with ASD, this information has been based on studies with a relatively small number of adult patients. We studied unoperated patients aged over 40 years to define the patterns of present...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/S0167-5273(03)00192-X
更新日期:2004-02-01 00:00:00
abstract:INTRODUCTION:We aimed to study the prevalence and types of sleep apnea (SA) as well as their clinical characteristics in atrial fibrillation (AF) ablation candidates in Japan. METHODS:Before catheter ablation, 197 consecutive AF patients (age: 60 ± 9 years, body mass index; 25.0 ± 3.0) were evaluated with portable pol...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2018.01.103
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Incidence and prognostic impact of heart failure (HF) progression has been not well addressed. METHODS:From 2009 until 2015, consecutive ambulatory HF patients were recruited. HF progression was defined by the presence of at least two of the following criteria: step up of ≥1 New York Heart Association (NYHA...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2018.08.049
更新日期:2019-02-15 00:00:00
abstract:OBJECTIVE:Because the lipoprotein effects of statin and fibric acid derivatives therapies differ, we studied the effects of these therapies in patients with hyperlipidemia on lipoproteins, vasomotor function, and plaque stability. METHODS:We administered simvastatin, 20 mg daily, to 27 patients with hypercholesterolem...
journal_title:International journal of cardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.ijcard.2003.09.007
更新日期:2004-11-01 00:00:00
abstract:BACKGROUND:Sinus node dysfunction is frequently observed in patients with congenital heart disease (CHD). Variants in the Vascular Endothelial Growth Factor-A (VEGF) pathway are associated with CHD. In Vegf(120/120) mice, over-expressing VEGF120, a reduced sinoatrial node (SAN) volume was suggested. Aim of the study is...
journal_title:International journal of cardiology
pub_type: 杂志文章
doi:10.1016/j.ijcard.2014.12.006
更新日期:2015-03-15 00:00:00