[The importance of changes in the septal Q wave induced by exercise in the detection of ischemic heart disease].
Among the numerous variables measured by the electrocardiogram during exercise little attention has been paid to the "septal" Q wave. We examined changes of the "septal" Q wave amplitude during exercise in 43 patients with chest pain. Coronary arteriography showed significant changes in 23 patients and normal arteries in 20. The Q wave amplitude was measured in leads V4-V6 immediately before and at the peak of submaximal bicycle exercise. The amplitude of "septal" Q wave increased during exercise in 11 (55%) patients, and decreased or was not changed in 9 (45%) of the normal subjects (p greater than 0.05). However, the Q wave amplitude increased in 6 (26%) patients, and decreased or was not changed in 17 (74%) patients with ischaemic heart disease (p less than 0.05). Thus, the sensitivity of Q wave analysis in the detection of coronary disease was 74% (p less than 0.05), but specificity was only 55% (p greater than 0.05).
Rakocević
V
V
Department of Neurology, University Clinical Centre, Belgrade.
Marić
G
G
Stojanović
G
G
D003327:Coronary Disease / Q000175:diagnosis*; D004562:Electrocardiography; D005080:Exercise Test; D006801:Humans
Vrednost promene septumskog talasa Q izazvane fizickim opterećenjem u otkrivanju ishemijske bolesti srca.