Recurrent syncope of unknown origin: Diagnosis with an implantable loop recorder

In about a third of cases of recurrent syncope a diagnosis cannot be establ ished despite extensive cardiovascular and neurologic testing. In patients without underlying heart disease the sensitivity of conventional diagnostic testing is low. Case Report: A 33-year-old male patient underwent implantation of a loop re corder (Reveal(R)) after negative neurological and cardiovascular testing. One month after implantation sinus node arrest could be documented during a pre-syncope. The patient underwent pacemaker implantation and remains asym ptomatic since then. Conclusion: In patients with syncope and a negative conventional diagnostic workup the implantable loop recorder is a helpful and cost-effective diagn ostic tool.