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Implantable Cardioverter Defibrillators And Magnetic Resonance Imaging of the Heart at 1.5 Tesla

2014-07-23 21:35:42 | BioPortfolio

Summary

To evaluate short-term and long-term effects by MR imaging on the technical and functional status of implantable cardioverter defibrillators.

Description

The presence of an implantable cardioverter defibrillators (ICD) is currently considered an absolute contraindication to MR imaging, and most patients with PM are excluded from having MRI. As a result from studies such as MADIT I, MADIT II, SCDHeft etc. the number of patients with ICDs has been continuously growing over the past years, ans this development will continue.

The aim of this study is to develop a strategy for safe performance of MR imaging at 1.5T, which included restriction of specific absorption rate (SAR) values to minimize the risk of lead heating, and ICD reprogramming to avoid interference from time varying gradient fields. The safety of this approach is then evaluated in a large group of ICD patients including assessment of potential myocardial thermal injury by measuring serum troponin I and pacing capture thresholds, and performing a follow-up 6 weeks after MR imaging to evaluate long-term effects.

Study Design

Observational Model: Defined Population, Observational Model: Natural History, Time Perspective: Longitudinal, Time Perspective: Prospective

Conditions

Defibrillators, Implantable

Location

University of Bonn, Department of Cardiology
Bonn
NRW
Germany
53127

Status

Recruiting

Source

University Hospital, Bonn

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-07-23T21:35:42-0400

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PubMed Articles [228 Associated PubMed Articles listed on BioPortfolio]

Electromagnetic Interference with Protocolized Electrosurgery Dispersive Electrode Positioning in Patients with Implantable Cardioverter Defibrillators.

Electromagnetic interference from monopolar electrosurgery may disrupt implantable cardioverter defibrillators.Current management recommendations by the American Society of Anesthesiologists and Heart...

Impact of diurnal variations in the QRS complex and T-waves on the eligibility of subcutaneous implantable cardioverter-defibrillators.

Subcutaneous implantable cardioverter-defibrillators (S-ICDs) are an established therapy for preventing sudden cardiac death. However, a considerable number of patients still undergo inappropriate sho...

Single incision technique for implantation of subcutaneous implantable cardioverter defibrillators.

Subcutaneous implantable cardioverter defibrillators (S-ICDs) have gained increasing popularity because of certain advantages over transvenous ICDs. However, while conventional ICDs require a single s...

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To assess the association between atrial fibrillation (AF) and all-cause mortality and implantable cardioverter defibrillators (ICD) therapies in heart failure (HF) patients with reduced ejection frac...

The article covers the development of the problem of sudden cardiac death prevention with the implantable cardioverter-defibrillators from the moment of creation of these devices to our days. The curr...

Medical and Biotech [MESH] Definitions

Types of artificial pacemakers with implantable leads to be placed at multiple intracardial sites. They are used to treat various cardiac conduction disturbances which interfere with the timing of contraction of the ventricles. They may or may not include defibrillating electrodes (IMPLANTABLE DEFIBRILLATORS) as well.

Implantable devices which continuously monitor the electrical activity of the heart and automatically detect and terminate ventricular tachycardia (TACHYCARDIA, VENTRICULAR) and VENTRICULAR FIBRILLATION. They consist of an impulse generator, batteries, and electrodes.

Cardiac electrical stimulators that apply brief high-voltage electroshocks to the HEART. These stimulators are used to restore normal rhythm and contractile function in hearts of patients who are experiencing VENTRICULAR FIBRILLATION or ventricular tachycardia (TACHYCARDIA, VENTRICULAR) that is not accompanied by a palpable PULSE. Some defibrillators may also be used to correct certain noncritical dysrhythmias (called synchronized defibrillation or CARDIOVERSION), using relatively low-level discharges synchronized to the patient's ECG waveform. (UMDNS, 2003)

Surgically placed electric conductors through which ELECTRIC STIMULATION of nerve tissue is delivered.

Implantable fracture fixation devices attached to bone fragments with screws to bridge the fracture gap and shield the fracture site from stress as bone heals. (UMDNS, 1999)

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