title: Automated on-line measurement of electrophysiologic intervals during cardiac catheterization.
abstract: A small dedicated, computer-controlled waveform analyzer was used to automatically measure the R-R cycle length, low right atrium to His, and His to ventricle intervals obtained during electrophysiologic studies on 35 patients. These measurements were compared to intervals hand-measured separately and found to correlate well (0.92, 0.83, and 0.75, respectively). The sources of error, possible pitfalls, and future uses of this technique are discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D002036:Bundle of His / Q000502:physiology*; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D003201:Computers; D004562:Electrocardiography; D004594:Electrophysiology / Q000379:methods*; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009862:Online Systems