Mitral Valve Repair for Congenital Mitral Regurgitation in an Adult Suffering from Hypoplasia of Chordae Tendanea / 日本心臓血管外科学会雑誌

Congenital mitral regurgitation (MR) occurs infrequently and the number of reported adult surgical cases is small. A 77-year-old man presented with an exacerbation of congestive heart failure. He had a 19-year history of receiving medical treatment for MR and atrial fibriration. Transthoracic and transesophageal echo cardiograms revealed severe MR due to the restriction of the posterior mitral leaflet with very short chorda tendanea attached beneath the posterior leaflet preoperatively. We diagnosed this case to have congenital MR (Carpentier type III) in an adult based on the specific findings of echocardiography and mitral valve plasty was thus performed. All the dysplastic chordae of the P2 and P3 in the immovable leaflet region were cut and the reconstructed by the fifth artificial chordae. These procedures successfully allowed the posterior mitral leaflet to recover its normal shape and movability. Postoperative echocardiography showed no further mitral regurgitation and normal leaflet motion.

Mid-term Results of Endovascular Treatment for Type B Aortic Dissection / 日本心臓血管外科学会雑誌

<b>Background</b> : Endovascular treatment of the thoracic aorta (TEVAR) for type B aortic dissection is reported to be effective if the interval between the onset and the procedure is relatively short. However, the optimal timing for TEVAR is still controversial. <b>Method</b> : From December 2008 to April 2015, we experienced 46 TEVARs for type B aortic dissection. The interval between onset and TEVAR was within 3 months in 15 cases (Group A), from 3 months to 1 year in 10 cases (Group B), and more than 1 year in 21 cases (Group C). <b>Result</b> : Primary success was obtained in all cases, and no new intimal tear was formed during the procedure. There was no hospital death. At the time of discharge, disappearance of ULP or thrombosed thoracic false lumen occurred significantly more frequently in Group A (93%) than in Group B (50%) and Group C (43%) (<i>p</i><0.05). At 6 months, the rate of the patients with reduced aneurysm diameter more than 5 mm was significantly higher in Group A (87%) and Group B (70%) than in Group C (19%) (<i>p</i><0.05). Three cases of Group C had enlargement of the aneurysm despite of TEVAR, and graft replacement of thoracoabdominal aorta was performed in one of the cases. <b>Conclusion</b> : For type B aortic dissection, TEVAR is more effective if performed within 3 months from the onset.

A Case of Successful Hybrid Treatment for Chronic Type B Dissection in a Patient with Bilateral Occlusion of Iliac Arteries / 日本心臓血管外科学会雑誌

Hybrid techniques to enable endovascular treatment of complex aortic pathology have been previously described. A staged endograft repair of a complex, chronic Stanford type B aortic dissection with atherosclerotic occlusion of bilateral iliac arteries is reported in a 66-year-old man. The patient also had chronic obstructive lung disease as well as chronic renal dysfunction. The aneurysmal portion of the dissection extended from the distal arch to the entire thoracic aorta. Bilateral femoral arteries were bypassed from the abdominal aorta using open techniques. Then, total arch replacement with a frozen elephant trunk was performed through median sternotomy. Finally, the aneurysmal portion was completely covered with an endograft from the frozen elephant trunk to the upper abdominal aorta, just proximal to the celiac trunk. The patient had no neurologic complications. This case report illustrates the feasibility of the hybrid technique in selected high-risk patients when confronted with complex aortic pathology.