Unanswered questions in patients with concurrent atrial fibrillation and acute coronary syndrome.

The best regimen for the long-term management of patients with atrial fibrillation who present with an acute coronary syndrome or require placement of a coronary stent remains unclear. Clinicians need to understand the risk of stroke, stent thrombosis, and major bleeding associated with treating these patients. Numerous studies and risk assessment schemes provide clinicians with an estimation of the risk of stroke, stent thrombosis, and major bleeding that may be associated with the use or avoidance of dual antiplatelet therapy with concurrent anticoagulation therapy (triple therapy).

Continuous low-level vagus nerve stimulation reduces stellate ganglion nerve activity and paroxysmal atrial tachyarrhythmias in ambulatory canines.

Background: We hypothesize that left-sided low-level vagus nerve stimulation (LL-VNS) can suppress sympathetic outflow and reduce atrial tachyarrhythmias in ambulatory dogs.

Methods And Results: We implanted a neurostimulator in 12 dogs to stimulate the left cervical vagus nerve and a radiotransmitter for continuous recording of left stellate ganglion nerve activity, vagal nerve activities, and ECGs. Group 1 dogs (N=6) underwent 1 week of continuous LL-VNS.