Abstract:
:Coronary artery stents have been developed to overcome arterial abrupt closure and restenosis following balloon angioplasty. Complications of stent insertion include loss of the device from its delivery system into the peripheral circulation. Certain types of stents are almost radiolucent, making localization of the lost devices difficult. Nonferromagnetic metallic biomedical implants induce alteration of the local magnetic field and this leads to loss of signal from the surrounding tissues. We have used this property to localize a misplaced coronary artery stent in a 53-year-old man who underwent unsuccessful stent insertion. A 0.5 Tesla magnetic resonance scanner was used to acquire gradient-echo and spin-echo images. An in vitro experiment was first carried out on a stent similar to that used in our patient to establish that it was nonferromagnetic and to determine the optimum imaging technique. Gradient-echo images with a relatively long echo time (22 ms) gave the largest area of signal loss around the stent, and this sequence was used for localization of the stent found in the patient's left profunda femoris artery. This was subsequently confirmed by digital radiography. We have demonstrated the convenience and practicality of using magnetic resonance imaging for the localization of a misplaced coronary artery stent in a patient. The technique is safe, noninvasive, and uses no ionizing radiation.
journal_name
Clin Cardioljournal_title
Clinical cardiologyauthors
Mohiaddin RH,Roberts RH,Underwood R,Rothman Mdoi
10.1002/clc.4960180313subject
Has Abstractpub_date
1995-03-01 00:00:00pages
175-7issue
3eissn
0160-9289issn
1932-8737journal_volume
18pub_type
杂志文章abstract::Ranolazine utilization in the management of refractory angina has been established by multiple randomized clinical studies. However, there is growing evidence showing an evolving role in the field of cardiac arrhythmias. Multiple experimental and clinical studies have evaluated the role of ranolazine in prevention and...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.22476
更新日期:2016-03-01 00:00:00
abstract:BACKGROUND:Total serum transforming growth factor-beta 1 (tsTGF-β1) is increased in patients with Marfan syndrome (MFS), but it has not been assessed in thoracic aortic aneurysm and dissection (TAAD), Loeys-Dietz syndrome (LDS), and bicuspid aortic valve disease (BAVD). HYPOTHESIS:tsTGF-β1 is increased in genetic aort...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22320
更新日期:2014-11-01 00:00:00
abstract:BACKGROUND:It is unclear whether more severe coronary atherosclerosis is a prerequisite to an initial acute coronary event in women vs men. HYPOTHESIS:Women may have more severe coronary atherosclerosis than men in patients with acute coronary event. METHODS:We used intravascular optical coherence tomography (OCT) to...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22825
更新日期:2017-12-01 00:00:00
abstract::Paradoxical interventricular septal motion with right ventricular dilatation has been considered the hallmark of right ventricular volume overload. We report a 43-year-old woman with severe pulmonary hypertension due to pulmonary veno-occlusive disease who exhibited these echocardiographic abnormalities. Right ventric...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960081111
更新日期:1985-11-01 00:00:00
abstract::The histories, rest, and exercise ECG results of 60 patients without myocardial infarction complaining of chest pain were submitted to 6 physicians (3 cardiologists and 3 noncardiologists) who were unaware of the angiographic findings. The physicians were requested to estimate the probability of coronary artery diseas...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960071207
更新日期:1984-12-01 00:00:00
abstract::The combination of cilostazol, aspirin, and clopidogrel (triple therapy) after percutaneous coronary intervention has been considered as an alternative therapy. We performed a meta-analysis based on 8 randomized controlled trials with a total of 3332 patients to compare the effectiveness and safety of this triple ther...
journal_title:Clinical cardiology
pub_type: 杂志文章,meta分析,评审
doi:10.1002/clc.22001
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND:Following successful cavotricuspid isthmus (CTI) ablation during typical atrial flutter (AFL), anticoagulation therapy is usually withdrawn. However, potential subsequent atrial fibrillation (AF) in these patients may increase embolic risk in the long term. Embolic rates in this setting have not been clearly...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.22538
更新日期:2016-06-01 00:00:00
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journal_title:Clinical cardiology
pub_type: 杂志文章,meta分析
doi:10.1002/clc.4960240112
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:QT dispersion (QTd = QTmax-QTmin) measured as interlead variability of QT interval reflects the spatial inhomogeneity of ventricular repolarization times, and increased QTd may provide a substrate for malignant ventricular arrhythmias. Ischemia is associated with regional abnormalities of conduction and repo...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960220109
更新日期:1999-01-01 00:00:00
abstract::Antithrombotic and thrombolytic therapies confer clear net benefits in the treatment of acute myocardial infarction (AMI). Antithrombotic therapy with aspirin yields conclusive reductions in vascular mortality as well as reinfarction and stroke and should be administered to all patients with suspected AMI. There is pr...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960201408
更新日期:1997-11-01 00:00:00
abstract::Antiarrhythmic drugs are an essential tool in the management of atrial fibrillation (AF). Although we are already on the threshold of a large expansion in the use of ablation therapies, these will not, however, be appropriate for all patients, and pharmacological therapies will continue to have an important place in t...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.20136
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:Oxidized low-density lipoprotein (oxLDL) not only plays an important role in plaque formation, but also impairs the endothelium-dependent relaxation. Constrictive remodeling rather than intimal hyperplasia mainly contributes to restenosis after balloon angioplasty. Probucol (powerful antioxidant) reduced res...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960260107
更新日期:2003-01-01 00:00:00
abstract::There is scant information regarding the effect of exercise training begun soon after hospital discharge for myocardial infarction (MI) with respect to subsequent improvement in exercise tolerance, enhancement of regional myocardial perfusion, or left ventricular function. Accordingly, 19 post-MI patients (mean age 53...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960150105
更新日期:1992-01-01 00:00:00
abstract:BACKGROUND:Primary percutaneous coronary intervention (PCI) is the most common method of reperfusion in patients with ST-segment elevation myocardial infarction (STEMI) in the United States. The intersection between processes of care and performance measures such as door-to-balloon (D2B) times and clinical trials evalu...
journal_title:Clinical cardiology
pub_type: 杂志文章,随机对照试验
doi:10.1002/clc.22349
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Noncardiac organ failure has been associated with worse outcomes among a cardiac intensive care unit (CICU) population. HYPOTHESIS:We hypothesized that early organ failure based on the sequential organ failure assessment (SOFA) score would be associated with mortality in CICU patients. METHODS:Adult CICU p...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.23339
更新日期:2020-05-01 00:00:00
abstract:BACKGROUND:Late potentials (LP) on signal-averaged electrocardiography (SAECG), recorded 6 to 30 days after an acute myocardial infarction (AMI), identify patients at risk for late arrhythmic events. Angiotensin-converting enzyme (ACE) inhibitors have been shown to reduce ventricular remodeling and cardiovascular morta...
journal_title:Clinical cardiology
pub_type: 临床试验,杂志文章
doi:10.1002/clc.4960230206
更新日期:2000-02-01 00:00:00
abstract::The role of catecholamine in atrial natriuretic peptide (ANP) secretion and its secretory mechanism in normal humans is not well defined; therefore, we studied the relationship among ANP, catecholamine, and atrial pressures in 25 patients without cardiovascular disease and in 35 patients with chronic congestive heart ...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960110402
更新日期:1988-04-01 00:00:00
abstract:BACKGROUND:When used in appropriately selected heart failure (HF) patients, cardiac resynchronization therapy (CRT) reduces mortality and hospitalization. It is not understood whether CRT implantation during hospitalization for HF is associated with similar benefits. HYPOTHESIS:Timing of CRT implantation relative to h...
journal_title:Clinical cardiology
pub_type: 杂志文章,多中心研究
doi:10.1002/clc.23135
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Recent studies have suggested that immunoassay of cardiac troponin T (cTnT) provides a more sensitive measurement of myocardial necrosis than creatine kinase MB (CK-MB) mass concentration. HYPOTHESIS:The purpose of this study was to compare the release of cTnT and CK-MB isoenzyme in patients undergoing perc...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960191005
更新日期:1996-10-01 00:00:00
abstract::The safety of quinapril hydrochloride, a new nonsulfhydryl angiotensin-converting enzyme (ACE) inhibitor with an intermediate duration of action, has been evaluated in 3,031 patients with hypertension and congestive heart failure (CHF) and has been compared with other ACE inhibitors. A comparison of double-blind studi...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960131408
更新日期:1990-06-01 00:00:00
abstract:BACKGROUND:There is increasing evidence that chronic atrial fibrillation (AF) is associated with a prothrombotic or hypercoagulable state. HYPOTHESIS:This study was undertaken to determine whether short-term exercise in patients with chronic AF would shift the overall hemostatic balance toward a more prothrombotic sta...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960240512
更新日期:2001-05-01 00:00:00
abstract::The coronary artery thrombus that causes acute myocardial infarction can be lysed, and reperfusion can be achieved, in the first few hours after infarction. However, the infarct vessel will reocclude in 15-30% of patients, and this event is frequently associated with pain, reinfarction, arrhythmias, or death. The risk...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960080902
更新日期:1985-09-01 00:00:00
abstract::The noninvasive assessment of the severity of aortic stenosis is difficult. A recent description of systolic flutter of aortic valve leaflets as a screening test for severe aortic stenosis was applied to a group of patients who had undergone catheterization. As opposed to the previous report, we found this an inaccura...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960070407
更新日期:1984-04-01 00:00:00
abstract::Vasodilating prostaglandins may be increased in patients with chronic congestive heart failure (CHF) to balance out the effects of vasoconstricting forces. Significant increases in plasma levels of bicycloprostaglandin E2 metabolite (PGEm), a chemically stable degradation product of the vasodilating prostaglandin E2, ...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960120206
更新日期:1989-02-01 00:00:00
abstract::Patients with atrial fibrillation (AF) have an increased stroke risk compared with those in sinus rhythm, although the absolute risk for individual patients is modulated by the presence of various additional risk factors. Patient selection for oral anticoagulation for stroke prevention is based on risks of stroke and ...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.22122
更新日期:2013-06-01 00:00:00
abstract::A patient with severe pulmonary hypertension secondary to the CREST syndrome variant of scleroderma is described. Acute reductions in both pulmonary artery pressure and total pulmonary resistance were seen with nifedipine and oxygen administration. Reductions in resistance were maintained for over one month with this ...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960070111
更新日期:1984-01-01 00:00:00
abstract::Patients with coronary artery disease have a variety of treatment options available to them. These include medications to control anginal episodes and, when appropriate, revascularization interventions in the form of coronary artery bypass graft and angioplasty. Despite advances in the treatment of angina, a substanti...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960251407
更新日期:2002-12-01 00:00:00
abstract::Evidence is now accumulating which strongly suggests that prognosis of patients with painless myocardial ischemia determined either by ambulatory ECG monitoring or exercise testing may be no different than the prognosis of patients who have overt clinical manifestations of myocardial ischemia associated with transient...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:10.1002/clc.4960111202
更新日期:1988-12-01 00:00:00
abstract::The prognosis for patients with non-Q-wave myocardial infarction (MI) remains controversial, although a number of studies have shown a less favorable outlook after hospital discharge for patients with non-Q-wave than for those with Q-wave infarction. Numerous management strategies are available to the clinician, many ...
journal_title:Clinical cardiology
pub_type: 杂志文章,评审
doi:
更新日期:1989-07-01 00:00:00
abstract:BACKGROUND:Exercise-induced dyspnea is a frequent feature in patients with hyperthyroidism. HYPOTHESIS:Data from clinical studies to elucidate the origin of this symptom are lacking. In the current study, we examined the hemodynamic and oxygenation responses to exercise and beta-adrenergic blockade in patients with hy...
journal_title:Clinical cardiology
pub_type: 杂志文章
doi:10.1002/clc.4960270707
更新日期:2004-07-01 00:00:00