Independent Relationship between Ankylosing Spondylitis and Presystolic Wave Detected on Echocardiography.

In the mentioned investigations, although LVEFs of patients with AS were found to be lower than those of the control group, the difference did not reach statistical significance.[ 6 18 19 ] Ina study conducted by Sveälv et al ., involving 187 patients with AS, it was shown that diastolic dysfunction was infrequent and mild in patients with AS.[ 20 ] Chen et al . demonstrated the superiority of 2D speckle tracking analysis in revealing LV systolic dysfunction even when diastolic function seemed normal in patients with AS.[ 6 ] Since cardiac functions were evaluated by conventional echocardiography in the present study, diastolic dysfunction may not have been observed in the AS group.

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