Long-term management of idiopathic cough with ultrasound-guided pulsed radiofrequency ablation of the phrenic nerve

To the Editor:Idiopathic cough is associated with laryngeal hypersensitivity and chronic pain syndromes.Idiopathic cough can be diagnosed when patients have no cause of chronic cough after treatment of cough.Patients with chronic cough experience impaired quality of life(QOL),interruption of daily activity,and depression.Therefore,better approaches to refractory chronic cough areneeded.