Endovascular abdominal aortic aneurysm repair in high risk patients: outcomes of management.

BACKGROUND: The concomitant cardiopulmonary disease precluded the elective repair for abdominal aortic aneurysm (AAA) with acceptable risk. The endovascular abdominal aortic aneurysm repair (EVAR) has become an alternative method for the treatment of AAA with high-risk comorbidities. OBJECTIVE: Evaluate the results of EVAR in high-risk patients with large AAA. MATERIAL AND METHOD: A prospective study of high-risk patients with large AAA and suitable morphology who underwent EVAR between August 2003 and August 2005 was conducted. The long-term outcomes were observed up to December 2006. The comorbidities, size of aneurysm, types of procedures, operative time, amount of blood loss and transfusion, length of postoperative stay in intensive care unit and hospital, postoperative complications and mortality were analyzed. RESULTS: Eight patients (7 males and 1 female) with the mean age of 71.4 years (range 66-83 years) were included in the present study. The comorbidities were six of compromised cardiac status, one of severe pulmonary disease and one of morbid obesity. The average size of aneurysm was 6.2 +/- 0.64 centimetres. One patient also had large bilateral iliac artery aneurysms. Seven patients underwent EVAR with bifurcated aortic stent graft and one proceeded with aorto uni-iliac stent graft. Three patients underwent preoperative coil embolisation into internal iliac arteries when the distal landing zones at the external iliac arteries were considered. The mean estimated blood loss was 369cc and the mean blood transfusion was 0.88 units. There were no perioperative mortality, early graft occlusion, AAA rupture and open conversion in the present study. One patient had cardiac arrest due to upper airway obstruction but with successful treatment. Type II endoleak was observed in one patient and successfully treated by expectant management. One limb of bifurcated stent graft was occluded at the 5th month post EVAR and was successfully treated by artery bypass surgery at both groins. The 3-year primary graft limb patency was 87.5% (7/8). The survivals of patients at 1, 2 and 3 years were 100%, 100% and 87.5% respectively. The cause of death in one patient was not related to EVAR. CONCLUSION: EVAR may be a safe and effective alternative to open AAA repair especially in high-risk patients.

Rapidly enlarging and asymptomatic abdominal aortic aneurysm in a male patient with chronic obstructive pulmonary disease: A case report of early experience of endovascular aortic aneurysm repair (EVAR).

Objective: to report a case of an incidental large asymptomatic AAA in an ex-smoker with severe COPD successfully treated by EVAR and to delineate the results and complications of EVAR performed in operative theater of Siriraj Hospital. Methods: A retrospective review of selected high-risk patients with asymptomatic AAA treated by EVAR in operative theater of our hospital from August 2003 to December 2005 was performed. Results: All nine cases (100%), including reported case (100%), were successfully treated by EVAR. Merely one of 30-day peri-operative death (11.1%), of post-operative cardiopulmonary arrest (11.1%), of early AAA rupture (11.1%), of early graft limb occlusion (11.1%), of late graft limb occlusion (11.1%), and of early type II endoleak (11.1%) took place in this study. Neither late AAA rupture, AAA sac enlargement, nor graft migration happened. Conclusion: EVAR was achieved as a minimal invasive treatment of an incidental large asymptomatic AAA in an ex-smoker with severe COPD. Although EVAR provides an excellent alternative of AAA in high-risk patients, its high peri-operative mortality rate around 10 % should be taken into account.