A Case of Surgical Removal of an Intravascular Ultrasonography Catheter Entrapped in a Coronary Stent after Percutaneous Coronary Intervention / 日本心臓血管外科学会雑誌

Entrapment of an intravascular ultrasonography (IVUS) catheter is an infrequent but serious complication associated with percutaneous coronary intervention (PCI). We report a case of successful surgical treatment of an IVUS catheter entrapped in a coronary stent after PCI. An-80-year-old man was admitted to a hospital with sudden anterior chest pain. He underwent PCI to left circumflex branch (Cx) and left anterior descending artery (LAD), followed by IVUS to ascertain stent expansion of the LAD stent. The IVUS catheter became entangled in the stent and could not be withdrawn from the outside. The patient was transferred to our hospital for its surgical removal. For the emergent surgery, we opened the stent region in the LAD and directly removed the IVUS catheter with the twisted stent. The opened place in the LAD was directly closed. Additional coronary bypass grafting involving two vessels was performed. The postoperative course was uneventful with no graft occlusion.

A Case of Acute Type B Aortic Dissection Subsequent to Asymptomatic Chronic Type A Aortic Dissection Which Was Difficult to Distinguish from Acute Type A Aortic Dissection / 日本心臓血管外科学会雑誌

Aortic dissection presents with acute chest or back pain. However, it can be asymptomatic in the acute phase with delayed symptomatic presentation or incidental diagnosis upon chest imaging. We report a case of acute type B aortic dissection subsequent to chronic type A aortic dissection which was difficult to distinguish from acute type A aortic dissection. A 45-year-old man was admitted to a hospital with sudden back pain. An enhanced chest CT revealed a suspected acute type A aortic dissection. The patient was transferred to our hospital and we performed an emergent total arch replacement. Intraoperative findings showed that there were two entries at the origin of the brachiocephalic artery and the left subclavian artery. The ascending aorta presented wall thickening but the descending aorta did not present wall thickening. Histopathologically, the adventitia was obviously thickened with dissection findings in the tunica media. Thus it was diagnosed as acute type B aortic dissection subsequent to chronic type A aortic dissection. Great caution should be taken in asymptomatic chronic aortic dissection.

Aortic Stenosis and Regurgitation with Aortic Subannular Left Ventricular Diverticulum and Occlusion of the Right Coronary Ostium by the Bicuspid Aortic Valve / 日本心臓血管外科学会雑誌

A 63-year old man was referred to our hospital with dyspnea on exertion and palpitation. An echocardiogram disclosed aortic stenosis and regurgitation, mitral regurgitation and tricuspid regurgitation. During cardiac catheterization, the right coronary ostium could not be cannulated, by coincidence, showed ventricular outpouching. Preoperative contrast-enhanced CT showed the partition wall isolating the right coronary ostium and the left ventricular outpouching in the subaortic valve area. The patient underwent aortic valve replacement after resection of the rudimentary right coronary cusp, and we resected the outpouching and closed the orifice with mattress sutures from the inside of the LV and the outside. Histopathology demonstrated that the resected outpouching was congenital fibrous left ventricular diverticulum.