title: [Validation of a discontinuously recording, digital long-term ECG system (Siemens-Sirecust 802/850) using a single beat analysis].
abstract: Using beat-to-beat analysis we studied the annotation of 44 data-bases of the Massachusetts Institute of Technology (MIT) in comparison to the classification performed by a new microprocessor of a 24-h-ambulatory electrocardiographic device, which is based on real-time analysis and a solid-state ECG documentation. QRS detection was performed with an accuracy of 99%. Sensitivity and positive predictive accuracy were 70% and 87% for supraventricular ectopy. Using a fixed prematurity index of 80%, ventricular ectopy with a total of 7,845 beats was identified with a sensitivity of 64% and a positive predictive accuracy of 97%. With the additional consideration of late premature ventricular beats (PVB) sensitivity increased to 91% with a positive predictive accuracy of 96%. A sensitivity of more than 80% for singular PVB was achieved in 28/33 databases (85%), a similar positive accuracy was achieved in 27/33 databases (82%). Altogether, ventricular pairs and ventricular tachycardia resulted in a sensitivity of 83% and 76%, respectively, and in a positive predictive accuracy of 87% and 73%, respectively. Sensitivity exceeded 80% for ventricular pairs in 11/15 databases (77%) and for ventricular tachycardia in 10/14 databases (71%); similar results were observed for the positive predictive accuracy with 11/15 (73%) and 9/14 (64%) databases. In 42/44 databases and in all databases for arrhythmias of Lown class IVA and IVB, Lown classification was determined correctly. The Sirecust-Holter-ECG-system, a new device with real-time analysis and solid-state memory results in an accuracy for singular and complex ventricular arrhythmias, comparable to some of the presently available Holter systems.
authors: Innere Medizin III, Universitätsklinik Freiburg.
authors: M
authors: M
authors: Zehender
authors: T
authors: T
authors: Meinertz
authors: A
authors: A
authors: Geibel
authors: S
authors: S
authors: Hohnloser
authors: H
authors: H
authors: Just
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D005117:Cardiac Complexes, Premature / Q000175:diagnosis; D004562:Electrocardiography / Q000295:instrumentation*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007256:Information Systems / Q000295:instrumentation; D008991:Monitoring, Physiologic / Q000295:instrumentation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013610:Tachycardia / Q000175:diagnosis; D013617:Tachycardia, Supraventricular / Q000503:physiopathology
vernacular_title: Validierung eines diskontinuierlich aufzeichnenden, digitalen Langzeit-EKG-Systems (Siemens-Sirecust 802/850) mittels Einzelschlaganalyse.