Usefulness of the ergometric testing in patients with the long Q-T syndrome.
Fifty patients with an exercise test positive for coronary artery disease (CAD) were analyzed for the presence of a long Q-T interval corrected for heart rate (Q-Tc). While there were only 3 patients with a long Q-Tc (6%) in the resting ECG, with the exercise test their number increased to 12 (24% of the total). If the test could not be done, such subjects were considered to have CAD and normal Q-T intervals. This is of great importance because patients with normal Q-T intervals are treated with group I antiarrhythmic drugs, whereas these drugs are contraindicated in patients with long Q-T intervals.
D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D003327:Coronary Disease / Q000175:diagnosis / Q000503:physiopathology; D005080:Exercise Test; D005260:Female; D006801:Humans; D008133:Long QT Syndrome / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged