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Ergometric testing was performed in 96 officers of the Yugoslav Army, aged 30-59, with subjective troubles in the heart region and normal findings obtained by routine diagnostic procedures. In 36 examined officers (37.5%) ergometric finding was normal. In the rest of them, four different types of abnormal reactions of the cardiovascular system to exercise were recorded: myocardial ischemia (48.3%), abnormal reaction of blood pressure (24.1%), abnormal heart rates (16.1%) and extrasystoles (11.5%). The statistically significant correlation was found between subjective troubles in the heart region and positive ergometric findings.