title: [Differentiation of the abnormal QS complex in V1-V2 leads of standard electrocardiogram by using Frank's system of leads].
abstract: Frank's orthogonal system of leads x, y z was applied for electrocardiographic differentiation of the abnormal QS complex in V1-V3 leads of the standard electrocardiogram. Absence of the physiological Q wave in z+ lead of Frank evidences always presence of focal myocardial lesion in the anterior wall and this feature was used for electrocardiographic differential diagnosis of abnormal QS complex appearing as a result of recording of intraventricular potentials against actual focal myocardial lesion. The reported study was done in 37 patients with QS complex in V1-V3 leads in standard electrocardiogram. In 28 patients absence of the Q wave was noted in the z+ lead and presence of a scar in the anterior wall in tow-dimensional echocardiography, and in to patients presence of scar was confirmed additionally in radioisotope studies, and in one case on autopsy. In 9 patients the abnormal QS complex in V1-V3 leads was caused by recording of intraventricular potentials since in the z+ lead of Frank the Q wave was always present. Echocardiographic investigation demonstrated normal contractility of the anterior wall.
authors.affiliation: III Katedry i Kliniki Kardiologii Sl. Ak. Med. w Katowicach.
authors.forename: P
authors.initials: P
authors.lastname: Knosała
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000328:Adult; D000368:Aged; D003937:Diagnosis, Differential; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000503:physiopathology; D011656:Pulmonary Emphysema / Q000175:diagnosis / Q000503:physiopathology; D014672:Vectorcardiography / Q000379:methods
vernacular_title: Róznicowanie nieprawidłowego zespołu QS w odprowadzeniach V1-V3 elektrokardogramu standardowego za pomoca systemu odprowadzeń Franka.