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We aimed to evaluate the measurement of dimensions of interatrial septal aneurysm (IASA) detected in aircrew during 5 year aircrew periodic medical examination.
Data of 23 aircrew (age range 23-46 years) with IASA, detected during periodic examination, were retrospectively collected. They were divided into 2 groups: group 1 (pilots, n=13) and group 2 (non-pilot aircrew, n=10). In both groups bulging to rightward or/and to leftward of atrial septum was measured by using transthoracic echocardiography (TTE), apical 4-chamber view. The relation between the dimensions of aneurysm and the paradoxical movement was examined and compared. Associated diseases were also noted. Obtained data were analyzed using SPSS version 15.0.
For group 1 and 2; the average ages were 35.54±7.39, 33.50±7.17; diameters of aneurysm were 20.38±4.70 mm (10-28 mm), 21.30±5.64 mm (14-30 mm); the bulging of aneurysm were 10.08±2.87 mm (7-17 mm), 9.30±4.16 mm (6-20 mm) respectively and no statistically differences were found between them (p:0.41, p:0.926, p:0.271). 4 aircrew out of the both groups had paradoxical movement in their IASA. All of them were asymptomatic and none of them had cryptogenic stroke history. TTE revealed 3 pilots and 4 non-pilots had patent foramen ovale showing left-right shunt with 5-10 microbubble formations.
Decompression sickness, microbubble formation that passes through a defect in the interatrial septum and IASA have significant roles in development of stroke in aircrew. In our study we compared the dimensions of aneurysm between pilot and non-pilot aircrew groups with IASA and didn't find any statistically difference.