Endovascular Aortic Repair for Type B Acute Aortic Dissection with Leg Malperfusion / 日本心臓血管外科学会雑誌

Leg malperfusion accompanied with type B acute aortic dissection (AAD) is reported to be an independent predictor for mortality. In such a case, though aortic replacement, extra anatomical arterial bypass or endovascular aortic repair (EVAR) can be selected, an appropriate treatment strategy has not been established yet. A 53-year-old woman was urgently hospitalized with sudden low back pain and right leg weakness, despite the right popliteal and anterior tibial arteries being palpable. Computed tomography (CT) revealed a type B AAD, and antihypertensive therapy was initiated. She complained of intermittent claudication during rehabilitation, and right leg ischemia with decreased ankle brachial pressure index (ABPI) was detected. The follow-up CT revealed the narrow true lumen of the right common iliac artery compressed by the thrombosed false lumen and the large entry of the aortic dissection in the terminal aorta. At the subacute phase of the aortic dissection, EVAR was performed. To expand the true lumen and exclude the entry, Y-shaped stent-grafts were implanted in the infra-renal aorta and the bilateral common iliac arteries. The postoperative course was uneventful. Postoperative ABPI returned to the normal range, and the intermittent claudication disappeared. In conclusion, EVAR should be considered in patients with type B AAD complicated with leg malperfusion.

Endovascular Aneurysm Repair (EVAR) in a Patient with an Aortocaval Fistula / 日本心臓血管外科学会雑誌

We report a case of endovascular aneurysm repair (EVAR) in a patient with an aortocaval fistula (ACF) who presented with congestive heart failure due to left-to-right shunting. The patient was an 80-year-old man who complained of sudden respiratory discomfort and lower leg edema, and was admitted to the emergency department. The initial diagnosis on admission was acute heart failure. Because the inferior vena cava was visualized by angiography in the arterial phase due to the fistula from the abdominal aorta, after admission, we rediagnosed this case as ACF. As medical treatment did not improve the patient's symptoms, emergency surgery was decided upon. Because preoperative evaluation was able to rule out the existence of an aortic aneurysm, ACF closure was performed by EVAR. The postoperative course was uneventful and the patient was discharged 15 days after surgery. ACF without aortic aneurysm is uncommon and is not easily diagnosed. This case demonstrated that EVAR can be an effective treatment option for ACF.