Abstract:
INTRODUCTION:Irrigated tip radiofrequency ablation of cardiac arrhythmias was developed to increase the size of the radiofrequency-induced lesion, since cooling of the electrode tip allows use of higher power settings. The purpose of this study was to determine if the increased lesion size during irrigated tip ablation is caused by the cooling effect solely or if increased electrical conductivity around the tip also contributes by increasing the "current-delivering size" of the tip: the so-called "virtual electrode effect." METHODS AND RESULTS:In vitro strips of left ventricular porcine myocardium and in vivo canine left ventricles were ablated. In vitro closed loop tip and showerhead irrigated tip catheters were compared. In vitro and in vivo showerhead tip catheters irrigated with solutions having different ionic content were compared. We found no difference in lesion size for closed loop and showerhead-type catheters (998 +/- 345 vs. 811 +/- 313 mm(3) during power-controlled ablation and 227 +/- 76 vs 318 +/- 127 mm(3) during temperature-controlled ablation). For irrigation with liquids having increasing ionic strength we found a decrease in lesion volume in vitro (361 +/- 249 vs. 812 +/- 229 mm(3) (P < 0.001) for power-controlled and 156 +/- 78 vs. 318 +/- 127 mm(3) (P < 0.05) for temperature-controlled ablation and nonsignificant differences in vivo. CONCLUSIONS:The mechanism for enlarging lesion size during radiofrequency irrigated-tip ablation is that higher power levels can be used. There is no virtual electrode effect caused by the highly conductive surroundings of the tip during irrigation. In vitro this effect is shown to be opposite: it decreases lesion size.
journal_name
J Interv Cardioljournal_title
Journal of interventional cardiologyauthors
Petersen HH,Roman-Gonzalez J,Johnson SB,Hastrup Svendsen J,HaunsØ S,Packer DLdoi
10.1111/j.1540-8183.2004.09879.xsubject
Has Abstractpub_date
2004-06-01 00:00:00pages
171-7issue
3eissn
0896-4327issn
1540-8183pii
JOIC9879journal_volume
17pub_type
杂志文章abstract:BACKGROUND:Ideally, percutaneous, mechanical closure of defects of the atrial septum should completely resolve shunt. To achieve this goal, more information is needed about the factors associated with device failure. METHODS:Consecutive patients with cryptogenic neurological events who had severe baseline Valsalva shu...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2011.00644.x
更新日期:2011-08-01 00:00:00
abstract:AIMS:Clinical results following stent implantation in the superficial femoral artery (SFA) are limited due to restenosis, often caused by stent fractures. Therefore new stent devices are desirable. The present study details our initial experience with the routine use of the novel Protégé EverFlex long self-expanding ni...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2006.00197.x
更新日期:2006-12-01 00:00:00
abstract::The reliability, rapidity, and safety of nonsurgical, transatrial pericardial access for local cardiac therapy have been demonstrated in healthy animals. Since many patients take aspirin or have increased right-sided pressures, we evaluated the procedure's safety under these conditions. Transatrial pericardial access ...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2001.tb00364.x
更新日期:2001-10-01 00:00:00
abstract:INTRODUCTION:Sirolimus-eluting stents (SES) have demonstrated low target vessel revascularizations and low incidence of angiographic restenosis in several clinical scenarios. The aim of the present study was to assess the efficacy and safety of SES for the treatment of proximal left anterior descending coronary artery ...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2006.00119.x
更新日期:2006-04-01 00:00:00
abstract:INTRODUCTION:Hemostasis following transradial cardiac catheterization is achieved by external pressure application using various devices, TR Band being one. There is no standardized protocol for the application and removal of such devices. OBJECTIVE:To assess the safety and feasibility of a more rapid (1 hour) initiat...
journal_title:Journal of interventional cardiology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1540-8183.2009.00501.x
更新日期:2009-12-01 00:00:00
abstract::A group of 312 patients who underwent percutaneous coronary intervention for bifurcation lesions at 12 centers in China, Singapore, Thailand, Israel, India, and Japan were enrolled in a prospective, randomized DKCRUSH-1 trial. The goal of the study was to compare the double kissing (DK) crush technique with the classi...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1540-8183.2009.00440.x
更新日期:2009-04-01 00:00:00
abstract::Direct stenting could potentially lead to a reduction in dissections, time, and restenosis at 6-month follow-up. Using the premounted Palmaz-Schatz Crown stent elective stenting was performed without predilatation in 61 consecutive patients who were compared with a control group of provisional stenting. All patients u...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2002.tb01101.x
更新日期:2002-08-01 00:00:00
abstract:BACKGROUND:An anomalous origin of the right coronary artery (ARCA) from the left sinus of Valsalva (LSOV) has been reported in 6-27% of patients with coronary anomalies. The unusual location and course of this anomaly poses a technical challenge for the interventionalist. Appropriate guiding catheter selection is criti...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2009.00463.x
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVES:We derived a formula for maximal suggested door-in-door-out time (DIDO) for hospitals that do not perform primary percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI). BACKGROUND:Efforts to minimize DIDO at non-PCI hospitals can improve door-to-balloon time (D2B). Targetin...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/joic.12074
更新日期:2013-12-01 00:00:00
abstract:OBJECTIVES:This study aimed to examine the outcomes of endovascular recanalization for native superficial femoral artery (SFA) chronic total occlusion (CTO) in patients with critical limb ischemia (CLI) after femoropopliteal bypass failure with limited surgical revascularization options. BACKGROUND:Endovascular recana...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/joic.12470
更新日期:2018-04-01 00:00:00
abstract::Achieving controlled flow between the systemic and pulmonary venous circulations is desirable in many complex congenital heart diseases. This includes the Fontan circulation, primary pulmonary hypertension, double inlet ventricles, or hypoplastic left heart with obstruction to the atrioventricular valve. As no specifi...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2006.00155.x
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:The economic impact of bleeding in the setting of nonemergent percutaneous coronary intervention (PCI) is poorly understood and complicated by the variety of bleeding definitions currently employed. This retrospective analysis examines and contrasts the in-hospital cost of bleeding associated with this proce...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2009.00431.x
更新日期:2009-06-01 00:00:00
abstract:BACKGROUND:With the introduction of drug-eluting stents (DES), the angiographic rates of restenosis have reduced dramatically but less prominently in diabetic patients. We compared the effects of sirolimus-eluting stents (SES) versus paclitaxel-eluting stents (PES) on 6-month angiographic and clinical outcomes in Korea...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1540-8183.2008.00353.x
更新日期:2008-06-01 00:00:00
abstract:PURPOSE:In patients on oral anticoagulation (OAC) undergoing coronary stenting (PCI-S), procedural management and in-hospital outcome have never been specifically and prospectively investigated. Also, the contribution of early bleeding to the relevant hemorrhagic rate reported at follow-up with triple therapy of OAC, a...
journal_title:Journal of interventional cardiology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1111/j.1540-8183.2009.00468.x
更新日期:2009-08-01 00:00:00
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journal_title:Journal of interventional cardiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8183.2011.00650.x
更新日期:2011-10-01 00:00:00
abstract:Background:Patients with multivessel disease (MVD) often pursue complete revascularization (CR) during percutaneous coronary intervention (PCI) to improve prognosis. However, angiographic CR is not always feasible and is associated with some procedure-related complications in heart failure (HF) patients with MVD. Clini...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1155/2020/9506124
更新日期:2020-07-27 00:00:00
abstract:INTRODUCTION:Percutaneous mechanical thrombectomy (PMT) for treatment of massive pulmonary embolism (PE) has been shown to be technically feasible, although the complication rate of the procedure appears relatively high. Whether a conservative treatment approach defined by an early termination of the PMT procedure once...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2008.00405.x
更新日期:2008-12-01 00:00:00
abstract:INTRODUCTION:Current guidelines recommend coronary artery bypass grafting (CABG) for patients with multivessel coronary disease and left ventricular (LV) dysfunction. However, some patients undergo percutaneous coronary intervention (PCI) or solely medical therapy (MT) in actual practice. The comparison of long-term ou...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/joic.12497
更新日期:2018-06-01 00:00:00
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journal_title:Journal of interventional cardiology
pub_type: 杂志文章,评审
doi:10.1034/j.1600-0854.2003.8046.x
更新日期:2003-06-01 00:00:00
abstract::Transcatheter aortic valve replacement (TAVR) has emerged as an attractive option for patients with severe symptomatic aortic stenosis (AS) who are either at high risk or extreme risk for surgical aortic valve replacement (SAVR). This article summarizes the major advances in TAVR that were published or reported in 201...
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pub_type: 杂志文章,评审
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更新日期:2016-02-01 00:00:00
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journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1155/2020/2475930
更新日期:2020-07-11 00:00:00
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journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.1993.tb00859.x
更新日期:1993-09-01 00:00:00
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journal_title:Journal of interventional cardiology
pub_type: 杂志文章,meta分析
doi:10.1155/2020/4982987
更新日期:2020-08-13 00:00:00
abstract::Different coils have been used to close the patient ductus arteriosus (PDA). In small- and moderate-sized PDA, coils are an adequate alternative to surgery and/or to other devices. The aim of the study is to review and discuss the advantages and disadvantages of using coils (excluding PFM coils PFM Medical, Germany) t...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1046/j.1540-8183.2003.08029.x
更新日期:2003-04-01 00:00:00
abstract::Implantable cardioverter defibrillators are devices capable of detecting and terminating ventricular tachycardias or fibrillations. They are utilized in the treatment of severe ventricular tachyarrhythmias, and their efficacy in the prevention of sudden death is demonstrated. As a matter of fact, despite the new antia...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.1995.tb00931.x
更新日期:1995-12-01 00:00:00
abstract::Chronic total occlusion (CTO) is a frequent finding in patients with coronary artery disease and when clinically indicated, remains one of the most challenging subsets for intervention. Although successful recanalization rates of CTO have remained suboptimal in percutaneous coronary intervention, evolving techniques i...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章,评审
doi:10.1111/joic.12268
更新日期:2016-02-01 00:00:00
abstract::Coronary angiography, despite its inherent invasiveness and need for contrast media and radiographic exposure, is still routinely employed every year for the diagnostic and therapeutic management of millions of patients with or at risk for coronary artery disease. Whereas approximate visual estimation is the most comm...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8183.2009.00491.x
更新日期:2009-12-01 00:00:00
abstract:Objectives:We aimed to assess the procedural and clinical results of transcatheter aortic valve replacement (TAVR) for nonraphe bicuspid aortic stenosis (AS) with coronary vs mixed cusp fusion. Background:It remains unclear whether cusp fusion morphology affects TAVR outcomes in patients with nonraphe bicuspid AS. Me...
journal_title:Journal of interventional cardiology
pub_type: 临床试验,杂志文章
doi:10.1155/2019/7348964
更新日期:2019-11-03 00:00:00
abstract::Results from clinical trials of glycoprotein IIb/IIIa(GPIIb/IIIa) inhibitors during the past decade have established their current role in the treatment of non-ST-segment elevation acute coronary syndrome and in percutaneous coronary interventions. However, there are still unanswered questions on optimal use of GPIIb/...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8183.2006.00182.x
更新日期:2006-10-01 00:00:00
abstract:OBJECTIVES:We evaluated the occlusion rate and safety of Cook detachable coils versus Gianturco coils in transcatheter closure of patent ductus arteriosus (PDA). BACKGROUND:The Cook detachable coil recently was introduced in an attempt to improve the safety of transcatheter closure of PDA. METHODS:Between January 199...
journal_title:Journal of interventional cardiology
pub_type: 杂志文章
doi:10.1111/j.1540-8183.2001.tb00730.x
更新日期:2001-04-01 00:00:00