Journal List > J Korean Rheum Assoc > v.15(3) > 1003627

Kim, Lee, Huh, Choi, Park, Cho, and Choi: Aortic Elasticity was not Related with Duration, Bath Ankylosing Spondylitis Disease Activity Index

Abstract

Objective

Cardiac manifestations are well recognized complication of ankylosing spondylitis (AS). They include aortic incompetence, conduction defects, mitral valve disease, pericarditis and cardiomyopathy. There was one study to evaluate the change of aortic elasticity in AS patient and the association between the aortic strain and duration of AS, Bath Ankylosing Spondylitis Disease Activity Index (BASDAI). We designed this study to determine whether aortic elasticity changes in Korean AS patients and is associated with the duration of AS or BASDAI.

Methods

18 AS patients without cardiovascular involvement and 18 sex and age- matched healthy subjects were enrolled in the study. Aortic strain and distensibility was calculated from aortic diameters measured by echocardiography and blood pressure measured by sphygmomanometry.

Results

The mean aortic strain and mean aortic distensibility in AS group indicated that there was not any correlation with those of control group, based on the statistical analysis. Moreover, there was no statistical correlation between the means of aortic strain, aortic distensibility and the duration or BASDAI of AS.

Conclusion

In patients with AS without cardiac involvement, the aortic elasticity was not decreased than that of control group, and aortic strain and distensibility were not correlated with the duration or BASDAI of AS.

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Table 1.
Clinical and demographic characteristics of both groups and the comparisons
  AS group (n=18) Control group (n=18) p∗
Age (years) 40.11±10.49 38.56±6.86 >0.05
Height (cm) 169.11±8.57 171.28±8.51 >0.05
Weight (kg) 64.37±11.34 68.00±10.88 >0.05
BMI (kg/m2) 22.50±3.30 22.69±2.44 >0.05
SBP (mmHg) 123.06±15.82 120.28±8.82 >0.05
DBP (mmHg) 77.22±11.27 78.89±6.31 >0.05
PP (mmHg) 45.83±8.09 41.39±8.59 >0.05
LVEF (%) 65.67±2.85 66.99±2.70 >0.05
Aos (mm) 3.48±0.32 3.44±0.33 >0.05
Aod (mm) 3.22±0.34 3.26±0.32 >0.05
Duration of AS (years) 13.39±10.56 (−)  
BASDAI 4.23±2.60 (−)  

The Mann-Whiteny U test BMI: body mass index, AS: ankylosing spondylitis, SBP: systolic blood pressure, DBP: diastolic blood pressure, PP: pulse pressure, LVEF: left ventricular ejection fraction, Aos: aortic systolic diameter, Aod: aortic diastolic diameter, BASDAI: bath ankylosing spondylitis disease activity index

Table 2.
The means of aortic strain, distensibility of groups and the comparisons between the groups
Parameters AS group (n=18) Control group (n=18) p
Aortic strain (%) 8.53±4.53 9.79±2.66 >0.05
Aortic distensibility index (cm−2dyn−110−6) 7.92±4.63 7.86±2.60 >0.05

The Mann-Whiteny U test

Table 3.
Statistical correlations between the indexes of aortic elasticity and duration, BASDAI of AS patients
Parameters   Duration of AS BASDAI
Aortic strain (%) r −0.229 −0.243
  p-value >0.05 >0.05
Aortic distensibility index r −0.428 −0.195
(cm−2dyn−110−6) p-value >0.05 >0.05

The Spearman rank test

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