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3.
Stereotact Funct Neurosurg ; 86(3): 184-6, 2008.
Article in English | MEDLINE | ID: mdl-18421247

ABSTRACT

The role of endogenous dopamine in severe Parkinson's disease is often underestimated. We report on a case of acute general motor worsening induced by the ingestion of fluphenazine in a parkinsonian patient successfully treated with STN DBS. Other etiologies were ruled out. Clinical improvement was gradual and fully reversible 4 days after discontinuation of the antidopaminergic drug. We suggest that residual striatal and extrastriatal dopaminergic pathways still play a paramount role in mediating central neurotrasmissions that may take part in STN DBS's mechanism of action.


Subject(s)
Deep Brain Stimulation , Dopamine/physiology , Parkinson Disease/surgery , Subthalamic Nucleus/surgery , Adult , Deep Brain Stimulation/methods , Dopamine Antagonists/adverse effects , Dopamine Antagonists/therapeutic use , Humans , Male , Parkinson Disease/drug therapy , Parkinson Disease/pathology , Subthalamic Nucleus/pathology
8.
Neuromodulation ; 9(4): 262-9, 2006 Oct.
Article in English | MEDLINE | ID: mdl-22151760

ABSTRACT

Objective. The objective of this study was to report our observations on the external electromagnetic field influences on deep brain stimulation (DBS) in our patient population and how these influences affected our patients' lives and other healthcare-related conditions. Materials and Methods. We have retrospectively analyzed data concerning the effects of external electromagnetic fields on 172 of our patients implanted with DBS. Results. Identifiable electromagnetic sources turned the implantable pulse generator (IPG) off in 20 patients. In two patients, these episodes necessitated replacement of the Itrel II IPG (Medtronic Inc., Minneapolis, MN, USA) with the magnetically shielded Kinetra IPG (Medtronic Inc.). Six patients received cardiac pacemakers, leading, in two patients, to interference between the systems. Our experience concerning magnetic resonance imaging, electrocardiogram (ECG), heart defibrillation, electro-cautery, and other sources of electromagnetic interference also is described. Conclusions. External electromagnetic interference may, in rare cases, constitute a severe threat to the well-being of the patient implanted with a DBS system. Also, malfunction of a DBS system may constitute a medical emergency. Nevertheless, in spite of these external electromagnetic influences, we consider DBS to be a safe method, provided safety protocols are followed, and provided that provider awareness about potential hazards is present.

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