Title: 103 Bioimpedance Vector Analysis for Volume Assessment in Dyspneic Patients
Abstract: Study ObjectiveIn patients presenting with shortness of breath, the diagnosis of acute heart failure requires accurate volume assessment. Bioimpedance vector analysis (BIVA) is a non-invasive method to quantify volume status, with low values being associated with volume overload, and can be performed within 60 seconds. We sought to determine if BIVA measurements are associated with volume overload in ED patients presenting with shortness of breath.MethodsEmergency department (ED) patients from 20 to 80 years of age and with a chief complaint of shortness of breath were enrolled. Patients with pacemaker or defibrillator were excluded. Total body hydration was prospectively determined using BIVA wrist and ankle tetrapolar-electrode method in the supine position. Height-corrected conductance (Xc/H) and resistance (Rz/H), impedance (Z), as well as vitals, standard of care labs, and chest x-ray (CXR) data were recorded. A positive CXR was defined as pulmonary edema or bilateral pleural effusions. The gold standard diagnosis was defined as the final hospital discharge diagnosis, with patients stratified as volume overloaded, normovolemic, or dehydrated.ResultsConclusionsLow BIVA values are associated with volume overload and therefore may be useful for its detection. Low BIVA values were also associated with the requirement for volume reduction therapy. Study ObjectiveIn patients presenting with shortness of breath, the diagnosis of acute heart failure requires accurate volume assessment. Bioimpedance vector analysis (BIVA) is a non-invasive method to quantify volume status, with low values being associated with volume overload, and can be performed within 60 seconds. We sought to determine if BIVA measurements are associated with volume overload in ED patients presenting with shortness of breath. In patients presenting with shortness of breath, the diagnosis of acute heart failure requires accurate volume assessment. Bioimpedance vector analysis (BIVA) is a non-invasive method to quantify volume status, with low values being associated with volume overload, and can be performed within 60 seconds. We sought to determine if BIVA measurements are associated with volume overload in ED patients presenting with shortness of breath. MethodsEmergency department (ED) patients from 20 to 80 years of age and with a chief complaint of shortness of breath were enrolled. Patients with pacemaker or defibrillator were excluded. Total body hydration was prospectively determined using BIVA wrist and ankle tetrapolar-electrode method in the supine position. Height-corrected conductance (Xc/H) and resistance (Rz/H), impedance (Z), as well as vitals, standard of care labs, and chest x-ray (CXR) data were recorded. A positive CXR was defined as pulmonary edema or bilateral pleural effusions. The gold standard diagnosis was defined as the final hospital discharge diagnosis, with patients stratified as volume overloaded, normovolemic, or dehydrated. Emergency department (ED) patients from 20 to 80 years of age and with a chief complaint of shortness of breath were enrolled. Patients with pacemaker or defibrillator were excluded. Total body hydration was prospectively determined using BIVA wrist and ankle tetrapolar-electrode method in the supine position. Height-corrected conductance (Xc/H) and resistance (Rz/H), impedance (Z), as well as vitals, standard of care labs, and chest x-ray (CXR) data were recorded. A positive CXR was defined as pulmonary edema or bilateral pleural effusions. The gold standard diagnosis was defined as the final hospital discharge diagnosis, with patients stratified as volume overloaded, normovolemic, or dehydrated. Results ConclusionsLow BIVA values are associated with volume overload and therefore may be useful for its detection. Low BIVA values were also associated with the requirement for volume reduction therapy. Low BIVA values are associated with volume overload and therefore may be useful for its detection. Low BIVA values were also associated with the requirement for volume reduction therapy.