Body Piercing with a Metallic Tongue Ring Resulting in Ineffective ICD
Shocks: “Heart to Mouth”
Abstract
Left ventricular assist devices (LVADs) provide circulatory support to
patients with severe left ventricular systolic dysfunction. Many such
patients have a pre-existing implantable cardioverter defibrillator at
the time of their LVAD surgery. LVAD implantation can alter ICD lead
parameters including R wave sensing, RV capture threshold, and
impedance. These changes can in turn affect the ability of the ICD to
successfully treat malignant ventricular arrythmias. In most patients
who present with ineffective ICD shocks, the failed shock is assumed to
be secondary to the patient’s severe cardiomyopathy. Especially the role
of physical examination in such patients is often minimized. In our
patient a thorough history and history guided physical examination, led
us to the root cause of his failed ICD shocks. Our patient was noted to
have a metal tongue ring, which was the likely cause of his ineffective
ICD shocks. Our case highlights the importance of a comprehensive
history and physical examination.