A Case of Staged Hybrid Repair for Subacute Type B Aortic Dissection in a Patient with Shaggy Aorta / 日本心臓血管外科学会雑誌

In aortic surgery involving shaggy aorta, surgical strategy to avoid embolism is crucial for each case. We applied the frozen elephant trunk technique to a patient with shaggy aorta. A 79-year-old man was admitted to our hospital for conservative treatment of acute Type B aortic dissection. Dissecting aneurysms of the aortic arch and descending aorta were shown to have rapidly dilated according to CT three weeks later. Preoperative contrast CT showed an ulcerated shaggy aorta from the aortic arch to the mid portion of the descending aorta. To utilize the benefit of the stent compared with the classical elephant trunk technique, we proposed that the frozen elephant trunk technique would be helpful in prevention of embolism. We therefore planned total arch replacement with the frozen elephant trunk technique and performed thoracic endovascular aortic repair. We employed the frozen elephant trunk technique in the first operation and balloon protection of the superior mesenteric artery and the renal artery in the second operation. The patient had an uneventful postoperative course without thromboembolism. The frozen elephant trunk technique may be helpful for patients with shaggy aorta to avoid thromboembolic events.

Aortic Abdominal Aneurysm Repair in the Patients with Home Oxygen Therapy for Chronic Obstructive Pulmonary Disease / 日本心臓血管外科学会雑誌

Between January and December 2006, 3 patients with aortic abdominal aneurysm (AAA) receiving home oxygen therapy (HOT) and 20 patients without HOT were studied. The 3 patients with HOT were all men, the mean age was 72 years (range, 69-74), and they had been treated with HOT for 37.3 months (1-102) due to chronic obstructive pulmonary disease (COPD) with a mean %VC of 96.9% and FEV1.0% of 42.8%. Only the FEV1.0% value in the preoperative data was significantly lower than in patients without HOT. In the 3 patients with HOT, extubation was performed immediately after operation, and minitracheotomy tubes (Mini-trach^®) to control sputum were inserted in the operation room. The minitracheotomy tubes were removed 5 or 6 days after operation. Postoperatively, no one with HOT had any major complications, while in those without HOT one patient had ileus and another had prolonged intubation. There were no significant differences between the 2 groups in operative time, blood loss, blood transfusion, or hospital stay. In conclusion, based on detached preoperative close estimation and careful postoperative supervision, patients receiving HOT can undergo AAA operations as safely as those not receiving HOT.

Aortic Valve Replacement in Patients Aged 80 or Older / 日本心臓血管外科学会雑誌

With the progressive aging of the Japanese population, cardiac surgeons are increasingly faced with elderly patients. We have studied 29 consecutive patients, 80 years of age or older, who underwent aortic valve replacement at our institution between January 2000 and December 2003. Mortality, morbidity and late follow-up results were compared to those in 36 patients aged from 64 to 75 years old undergoing the same procedure over the same time period. The older patient group had a significantly higher incidence of calcified aortic stenosis and emergency operations and a higher score of NYHA functional class. Hospital mortality was 2 of 29 (6.9%) in the older patient group and 2 of 36 (5.6%) in the control group (ns). Postoperative renal failure and respiratory failure which needed prolonged ventilator support occured significantly more often in the older patient group. However, there was no significant difference between the 2 groups in terms of hospital stay. Almost all octogenarians showed improved NYHA functional class to class I or II after the operations. The actuarial survival rate was 89% in the older patient group and 78% in the control group at 3 years. The late survival rate and cardiac event-free rate were not significantly different between these 2 groups. Following aortic valve replacement, octogenarians, despite more compromised pre-operative status had good relief of symptoms, a favorable quality of life and a similar late survival to the younger patient groups. These findings support the recommendation that valve replacement should be performed in octogenarians with symptomatic aortic valvular disease.