Carotid angioplasty and stenting in anatomically high-risk patients: Safe and durable except for radiation-induced stenosis.
OBJECTIVE
Carotid angioplasty and stenting (CAS) is used in patients considered high-risk for carotid endarterectomy (CEA). Patients qualify as high-risk because of medical comorbid conditions or for anatomic considerations (previous CEA, radical neck dissection, radiation). We compared the technical feasibility and durability of CAS in medically high-risk patients (MED) vs anatomically high-risk patients (ANAT).


METHODS
A retrospective review was performed of all consecutive patients undergoing CAS by a single vascular surgery group. All patients were high risk and evaluated with duplex ultrasound imaging and angiography. Primary end points were technical success, 30-day stroke, myocardial infarction (MI), death, and in-stent restenosis. Standard statistical analysis included Kaplan-Meier life tables.


RESULTS
From January 2003 to December 2007, 230 CAS (98 ANAT, 132 MED) procedures were attempted. The ANAT cohort comprised 84 patients with a single anatomic risk factor: 71 with a previous ipsilateral CEA, 6 high lesions, 6 history of neck radiation, and 1 with a tracheostomy. Ten patients had two or three anatomic risk factors: nine with radical neck dissection and radiation and one with neck radiation and ipsilateral CEA. The mean age was 71.1 years for ANAT vs 73.9 years for MED (P = .021). Technical success rates were 98% in ANAT and 98.5% in MED (P = .76). Thirty-day stroke rate was 1.0% in ANAT and 5.3% in MED (P = .14); the mortality rate was 2.0% in ANAT and 0.8% in MED (P = .79). The 2-year survival free from stroke was MED, 93.6% and ANAT, 98.9% (P = .118); and from restenosis was MED, 91.9%; and ANAT, 91.0% (P = .98). Two-year overall survival was significantly better in ANAT (84.6%) vs MED (70.1%; P = .026). Four of the seven restenoses in the ANAT group occurred in patients with previous neck radiation. The restenosis rate for radiation-induced (RAD) stenosis treated with CAS was significantly higher at 22.2% (4 of 18) compared with 3.8% (3 of 78) in ANAT group patients without a history of radiation (non-RAD; P = .028). The 2-year restenosis-free survival was 72.7% in the RAD group vs 95.9% in the non-RAD group (P = .017).


CONCLUSIONS
CAS is as technically feasible, safe, and durable in anatomically high-risk patients as in medically high-risk patients, with similar rates of periprocedural stroke and death and late restenosis. However, patients with radiation-induced stenosis appear to be at an increased risk for restenosis.
Shin
Susanna H
SH
Division of Vascular Surgery, Eastern Virginia Medical School, Norfolk, VA 23507, USA.
Stout
Christopher L
CL
Richardson
Albert I
AI
DeMasi
Richard J
RJ
Shah
Rasesh M
RM
Panneton
Jean M
JM
D000368:Aged; D000800:Angioplasty, Balloon / Q000379:methods* / Q000401:mortality; D019917:Blood Vessel Prosthesis Implantation; D016893:Carotid Stenosis / Q000000981:diagnostic imaging / Q000401:mortality* / Q000628:therapy*; D015331:Cohort Studies; D015897:Comorbidity; D005240:Feasibility Studies; D005260:Female; D005500:Follow-Up Studies; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000453:epidemiology; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D011336:Probability; D011832:Radiation Injuries / Q000150:complications* / Q000628:therapy; D012189:Retrospective Studies; D018570:Risk Assessment; D012720:Severity of Illness Index; D015607:Stents; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome; D018616:Ultrasonography, Doppler, Duplex; D014654:Vascular Patency