Implantable cardioverter defibrillator designed for use in a magnetic resonance imaging environment
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United States of America Patent
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Nov 29, 2016
Grant Date -
Nov 5, 2015
app pub date -
Jul 10, 2015
filing date -
Aug 19, 2011
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Abstract
An implantable cardioverter defibrillator (ICD) includes a communication interface operable to receive a communication signal from an external programmer. With the ICD not being in the presence of an MRI field generated by an MRI scanner, a communication signal is sent precharging a high energy storage capacitor before the patient undergoes the MRI scan. The signal also switches the ICD into an MRI mode which turns off the ICD's sensing functions detecting a dangerous ventricular arrhythmia. An operator monitors the patient's vital signs with sensors connected to the patient. If the patient does require the defibrillation shock, the operator sends a second communication signal delivering the defibrillation shock from the precharged high energy storage capacitor of the ICD. The patient can then be removed from the MRI scanner and the RF and gradient fields of the MRI scanner turned off.
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