Half-normal Saline in Idiopathic Left Ventricular Outflow Tract Arrhythmias Ablation

Inclusion criteria * male or female between 18 and 75 years of age at the time of enrollment * undergoing first-time radiofrequency ablation for left ventricular outflow tract ventricular arrhythmias * written informed consent obtained from subject or subject's legal representative and ability for subject to comply with the requirements of the study Exclusion criteria * ventricular arrhythmias originating from the right ventricular outflow tract according to the ventricular arrhythmia ECG morphology (i.e., precordial R wave transition at V3 or later) * ventricular arrhythmias not originating from cardiac outflow tracts * baseline hyponatremia (serum sodium level \< 135 mEq/L) * pregnant, breastfeeding, or unwilling to practice birth control during participation in the study * presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data