[Evaluation of the effects of macerated oral dipyridamole on the ergometric test]

Eighteen male patients with ages varying from 42 to 72 years (average 60.6), with coronary heart disease confirmed by angiography, on regular rehabilitation program and on regular use of dipyridamole were submitted to three exercise stress tests: a control test (TE1) and forty minutes after oral administration of macerated dipyridamole in doses of 150 mg (TE2) and 300 mg (TE3), respectively. The comparison between the data of TE2 and TE1 demonstrated that in TE2 the ST depression was more accentuated in the smallest maximal load attained and in the effort peak as well. The comparison between the data of TE3 and TE1 showed that in TE3: 1) the ST depression was more evident in the effort peak and in the smallest attained load; 2) the heart rate and the product heart rate x blood pressure were smaller in the effort peak; 3) the total time of angina and the time for its relief after effort, were longer. The other exercise stress test parameters did not show any significant changes. These data, suggest that the physical effort overload, after dipyridamole administration, produced a more marked myocardial ischemia, whose degree was proportional to the dose.