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Computer analysis of conventional 12 lead electrocardiograms were performed in 1486 male students of about 19 years old and 209 patients, using two different systems made in Japan. One system (X) were... used in a half of subjects and another system (Y) in another half of them, respectively. One physician checked all of the computer diagnosis in them. Compared with physician's diagnosis, both system showed various sensitivity (70-100%) and high specificity in electrocar-diographic findings. X system revealed lower sensitivity in short P-Q, first degree atrio-ventricular block and arrhythmias, compared with Y system. High incidence of left ventricular hypertrophy was observed in the diagnosis of both systems ; 19.3% in X system and 25.9% in Y system, respectively. Almost all of those students, who were diagnosed as left ventricular hypertrophy by computer analysis, showed neither left ventricular hypertrophy nor enlargement in echocardiogram and chest X-ray. These results suggest that new criteria for left ventricular hypertrophy in adolescent is necessary. It is concluded that computer analysis are useful for medical mass examination in university students, although partial modifications of programs are required.show more
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