title: Blood oxygen saturation during atrio-ventricular dissociation with wide-QRS complex tachycardias.
abstract: Amplitude ratios of two adjacent mixed blood oxygen saturation curve peaks in randomly selected strips of ECG were analysed in 32 patients with regular wide-QRS complex tachycardias and 60 control subjects where pacing was performed before ablation of narrow-QRS complex tachycardias. Patients with VT showed different patterns of A-to-V relationships, leading to varying ratios of SpO2 adjacent peak amplitudes, in contrast to patients with aberrant SVTs and 1:1 AV association. Application of a criterion of adjacent SpO2 peaks differing by twofold or more had a sensitivity of 90.0% and specificity of 83.3% to detect AV dissociation during VT. Fluctuations on the mixed oxygen saturation curve may be a useful non-invasive clinical parameter to detect different ventricular filling caused by atrio-ventricular dissociation during VT.
authors.forename: Germanas
authors.initials: G
authors.lastname: Marinskis
authors.forename: Gregory Y H
authors.initials: GY
authors.lastname: Lip
authors.forename: Audrius
authors.initials: A
authors.lastname: Aidietis
authors.forename: Audrius
authors.initials: A
authors.lastname: Adietis
authors.forename: Paulius
authors.initials: P
authors.lastname: Jurkuvenas
authors.forename: Diana
authors.initials: D
authors.lastname: Kaireviciūte
authors.forename: Vladimir
authors.initials: V
authors.lastname: Jezov
authors.forename: Kestutis
authors.initials: K
authors.lastname: Bagdonas
authors.forename: Pranas
authors.initials: P
authors.lastname: Serpytis
authors.forename: Aleksandras
authors.initials: A
authors.lastname: Laucevicius
mesh_terms: D016022:Case-Control Studies; D004562:Electrocardiography; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010092:Oximetry; D010100:Oxygen / Q000097:blood*; D011659:Pulmonary Gas Exchange; D013617:Tachycardia, Supraventricular / Q000097:blood* / Q000503:physiopathology
chemical_list: D010100:Oxygen