title: [Septal Q wave responses to exertion in the diagnosis of proximal stenosis of the anterior descending coronary artery].
abstract: In 29 patients with coronary artery disease (CAD) involving the proximal segment of left anterior descending coronary artery (LAD) and in 25 patients with normal coronary anatomy (control group) Q wave amplitude changes were studied in response to exercise with bicycle and treadmill. Decrease of the Q wave amplitude was observed only in the patient group. Increase in amplitude was found only in the control group. The sensitivity of bicycle test for a significant ST segment depression was 51.7%. The same value, obtained by treadmill exercise was 50%. When either a significant ST depression or decrease of Q wave amplitude was evaluated as an abnormal response to exercise, the sensitivity was 62% (bicycle) and 65% (treadmill). Taking both ST segment depression and reduction of Q wave amplitude, an increased sensitivity of exercise ECG examination can ben attained.
authors.affiliation: Csongrád Megyei Tanács Tüdökórház-Gondozóintézet, Kardiológiai Rehabilitációs Osztály, Deszk.
authors.forename: Z
authors.initials: Z
authors.lastname: Csanádi
authors.forename: K
authors.initials: K
authors.lastname: Szász
authors.forename: A
authors.initials: A
authors.lastname: Somfay
authors.forename: L
authors.initials: L
authors.lastname: Horváth
mesh_terms: D003327:Coronary Disease / Q000175:diagnosis* / Q000503:physiopathology; D003331:Coronary Vessels / Q000503:physiopathology; D004562:Electrocardiography; D005080:Exercise Test; D006801:Humans
vernacular_title: A terhelésre kialakuló septalis Q hullám változások jelentösége a ramus descendens anterior proximalis stenosisának felismerésében.