For the 106 TIA cases (86 nonsurgical cases and 20 surgical cases), the recurrence ratio of repeated TIA and/or newly developed completed stroke was compared each other among nonsurgical cases and also between surgical and nonsurgical cases with reference to the angiographically demonstrated cerebral arterial lesion. In addition, the recurrence ratio of the nonsurgical cases was compared each other between those with and without anticoagulant therapy.
The recurrence ratio (the incidence of repeated TIA and/or newly developed completed stroke) in the present cooperative study can be summarized as follows;
(1) the recurrence ratio was higher in TIA patients having any angiographically demonstrable cerebral arterial lesion, especially in the internal carotid artery, than in those without.
(2) no difference of the recurrence ratios was observed between the degree of occlusive lesion.
(3) the recurrence ratio in the anticoagulated cases was lower than that in non-anticoagulated cases.
(4) the recurrence ratio in the surgical cases was lower than that of the nonsurgical cases.
The study group on TIA criteria and detection. Heyman, A. et al.: IX. Transient focal cerebral ische-mia: Epidemiological and clinical aspects. Stroke, 5: 277, 1974.
