title: Changes in cardiac function after pedicle subtraction osteotomy in patients with a kyphosis due to ankylosing spondylitis.
abstract: Cardiac disease in patients with ankylosing spondylitis (AS) has previously been studied but not in patients with a kyphosis or in those who have undergone an operation to correct it. The aim of this study was to measure the post-operative changes in cardiac function of patients with an AS kyphosis after pedicle subtraction osteotomy (PSO). The original cohort consisted of 39 patients (33 men, six women). Of these, four patients (two men, two women) were lost to follow-up leaving 35 patients (31 men, four women) to study. The mean age of the remaining patients was 37.4 years (22.3 to 47.8) and their mean duration of AS was 17.0 years (4.6 to 26.4). Echocardiographic measurements, resting heart rate (RHR), physical function score (PFS), and full-length standing spinal radiographs were obtained before surgery and at the two-year follow-up. The mean pre-operative RHR was 80.2 bpm (60.6 to 112.3) which dropped to a mean of 73.7 bpm (60.7 to 90.6) at the two-year follow-up (p = 0.0000). Of 15 patients with normal ventricular function pre-operatively, two developed mild left ventricular diastolic dysfunction (LVDD) at the two-year follow-up. Of 20 patients with mild LVDD pre-operatively only five had this post-operatively. Overall, 15 patients had normal LV diastolic function before their operation and 28 patients had normal LV function at the two-year follow-up. The clinical improvement was 15 out of 20 (75.0%): cardiac function in patients with AS whose kyphosis was treated by PSO was significantly improved.
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: J
authors.initials: J
authors.lastname: Fu
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: K
authors.initials: K
authors.lastname: Song
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: Y G
authors.initials: YG
authors.lastname: Zhang
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: G Q
authors.initials: GQ
authors.lastname: Zheng
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: G Y
authors.initials: GY
authors.lastname: Zhang
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: C
authors.initials: C
authors.lastname: Liu
authors.affiliation: Chinese People's Liberation Army General Hospital, 28 Fuxing Rd, 100853, Beijing, PR, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000328:Adult; D004452:Echocardiography; D005260:Female; D005500:Follow-Up Studies; D006321:Heart / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D007738:Kyphosis / Q000209:etiology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods*; D011184:Postoperative Period; D013167:Spondylitis, Ankylosing / Q000150:complications*; D018754:Ventricular Dysfunction / Q000209:etiology
keywords: ankylosing spondylitis kyphosis; cardiac function; pedicle subtraction osteotomy; heart rate; echocardiography