stimulation permits routine EKG, EEG, and polysomnography Abstract—As the population of patients treated with deep brain stimulation (DBS) grows and the patients age, more will require routine or emergent electrophysiologic tests. DBS artifact may render these uninterpretable, whereas stopping DBS may release symptoms that confound evaluation. The authors find that monopolar, but not bipolar, s...

INTRODUCTION Brugada syndrome (BrS) is an autosomal dominant genetic disorder involving the abnormal function of cardiac voltage-gated sodium ion channels. Sodium channel loss of function can lead to early repolarization and loss of the Phase 2 action potential dome in cardiomyocytes. In BrS, this sodium channelopathy occurs in some, but not all, epicardial cells thus creating 1) juxtaposition ...

Cardiac disease is a rare primary cause of poor performance in the equine athlete. On the rare occasion that performance is affected by cardiac disease, dysrhythmia is the most common underlying cause. The technique of taking a resting electrocardiogram (EKG) using a base-apex lead configuration is now well established in equine practice; most equine practices are equipped with both the experti...

Background In routine cardiac MRI (CMRI) practice, radiological technologists are expected to optimize and utilize EKGs in gating and physiological monitoring. Many cardiac sequences are critically dependent on heart rate and rhythm and EKG gating problems lead to poor or nondiagnostic images. The technologist’s syllabus does not routinely include formal EKG recognition or CMRI trouble-shooting...