Influence of treatment modality on angiographic outcome after coronary stenting in diabetic patients: a controlled study.
OBJECTIVE
This retrospective study was designed to determine the six-month angiographic outcome after stenting of native coronary arteries in insulin-treated (ITDM) and non-ITDM patients with diabetes mellitus (DM) and compare the results with those in non-DM patients.


BACKGROUND
The influence of the treatment modality for DM on restenosis in patients undergoing coronary artery stenting has not been elucidated sufficiently.


METHODS
A total of 1,439 (70%) of 2,061 patients underwent repeated angiography within six months of coronary stenting. The ITDM and non-ITDM (oral hypoglycemic drugs or diet) were documented in 48 (3.3%) and 177 patients (12.3%), respectively, leaving 1,214 non-DM patients.


RESULTS
Baseline reference vessel diameter tended to be smaller in ITDM patients (mean, 2.73 mm) than in non-DM and non-ITDM patients (2.88 mm and 2.85 mm, respectively). However, percent diameter stenosis was not different. The median number of stents deployed was 1; median stent length was 15 mm. Statistically significant differences were present after stenting for the means of minimal lumen diameter (MLD) and acute gain between ITDM patients (MLD: 2.67 mm, acute gain: 1.98 mm) and non-DM patients (MLD: 2.81 mm, acute gain: 2.16 mm). At follow-up, percent diameter stenosis, late lumen loss and loss index were significantly higher in both non-ITDM lesions (42%, 1.14 mm and 0.56, respectively) and ITDM lesions (48%, 1.26 mm and 0.65, respectively) than in non-DM lesions (35%, 0.96 mm and 0.45, respectively). The corresponding differences between non-ITDM and ITDM lesions did not reach statistical significance. Restenosis rates in non-DM, non-ITDM and ITDM lesions were 23.8%, 32.8% (p = 0.013 vs. non-DM) and 39.6% (p = 0.02 vs. non-DM, p = 0.477 vs. non-ITDM), respectively.


CONCLUSIONS
This study showed that compared with stenting in non-DM patients, stenting of native coronary arteries in DM patients is associated with significantly increased lumen renarrowing, regardless of the treatment modality for DM.
Schofer
J
J
Center for Cardiology Othmarschen, Hamburg, Germany.
Schlüter
M
M
Rau
T
T
Hammer
F
F
Haag
N
N
Mathey
D G
DG
D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D017023:Coronary Angiography; D003327:Coronary Disease / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D003922:Diabetes Mellitus, Type 1 / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy; D003924:Diabetes Mellitus, Type 2 / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy; D003925:Diabetic Angiopathies / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D012008:Recurrence; D012189:Retrospective Studies; D015607:Stents; D015996:Survival Rate