To explore the correlation between constitution types of TCM and plasma D-dimer in patients with permanent atrial fibrillation.Methods:A total of 150 patients with permanent atrial fibrillation admitted in the inpatient department and the Southern Branch of Guang'anmen Hospital from January 2017 to September 2018 were selected as research objects.Their plasma D-dimer levels were detected,each Classification and judgment table of TCM Constitution Type was filled in,and the data were analyzed statistically.Results:The TCM constitutions of patients with permanent atrial fibrillation covered all 9 constitution types.Their proportions and plasma D-dimer levels(%,ng/mL)were:qi-deficiency constitution(40.6%,292.48±334.58),phlegm-dampness constitution(18.0%,324.74±346.78),blood-stasis constitution(10.0%,643.3±1627.23),yang-deficiency constitution(9.3%,396.64±404.01),yin-deficiency constitution(8.6%,432.46±664.35),qi-obstruction constitution(6.6%,133.7±79.37),dampness-heat constitution(3.3%,122.00±21.62),balanced constitution(2.6%,252.00±263.03),and allergic constitution(0.6%,13),respectively.Conclusion:The proportions of qi-deficiency constitution and phlegm-dampness constitution in patients with permanent atrial fibrillation were larger.Plasma D-dimer level:blood-stasis constitution>yin-deficiency constitution>yang-deficiency constitution>phlegm-dampness constitution>qi-deficiency constitution>balanced constitution>qi-obstruction constitution>dampness-heat constitution>allergic constitution.There was no significant difference in plasma D-dimer level between male and female patients.The plasma D-dimer level was not affected by age.