Thoracic Endovascular Aortic Repair for Aortopulmonary Fistula Which Had Difficulty with Preoperative Diagnosis / 日本心臓血管外科学会雑誌

<p>Aortopulmonary fistula with an arch aortic aneurysm is a rare disease that is difficult to diagnose and often presents with sudden, life-threatening heart failure. Here we report a case of aortopulmonary fistula for which we performed a thoracic endovascular aortic repair (TEVAR) with favorable results. A 79-year-old man presented with slurring of speech and body malaise at a neighborhood clinic. A distal arch aortic aneurysm was detected on chest computed tomography (CT) scans, and the patient was referred to our hospital for further management. We identified a saccular aneurysm and the dilated pulmonary artery, with maximum vessel diameters of 80 and 38 mm, respectively, on preoperative chest CT scans. He was diagnosed with an impending aortic rupture and a TEVAR was performed after preparing for a cervical ramification bypass. Intraoperatively, the aortopulmonary fistula had invaded the pulmonary artery, and the shunt created by the invasion was responsible for the sudden exacerbation of heart failure symptoms in the patient. The diameter of the saccular lump did not increase in the postoperative CT and follow-up visits were scheduled for subsequent monitoring. In the absence of significant complications and with improvement of heart failure symptoms, the patient was discharged from our hospital on the 37th postoperative day. He was later transferred to a neighborhood clinic for rehabilitation and subsequently discharged for further recuperation at home in the fifth postoperative month.</p>

The Technique of Adult Atrial Septum Defect Closure Supported by Minimally Invasive Cardiac Surgery (MICS) and Three Dimensional Endoscopy / 日本心臓血管外科学会雑誌

<p>The efficacy of minimally invasive cardiac surgery (MICS) has often been reported. However, in Japan most of these procedures are supported with robotic systems, which are expensive. We report the technique of atrial septum defect (ASD) closure by MICS and a three-dimensional endoscope without the aid of a robotic system. From March 2012 to April 2015, we performed ASD closure using this method in 7 patients. The use of a three-dimensional endoscope enables cardiac surgery to be performed through smaller incisions (≤5 cm in width). We have adopted this method of ASD closure with the Maze procedure for patients complicated by atrial fibrillation. The operation time will decrease as we improve our surgical technique. Our current practice is to attempt ASD closure with totally endoscopic support.</p>

Endovascular Treatment for Ruptured Chronic Type B Dissecting Aneurysm Using the Candy Plug Technique / 日本心臓血管外科学会雑誌

<p>We report a case of ruptured chronic type B aortic dissecting aneurysm that was successfully treated with the Candy plug technique to exclude a false lumen. A 57-year-old man had undergone abdominal fenestration for complicated acute type B aortic dissection previously. He then underwent debranching TEVAR for an impending rupture because of a dilated thoracic aortic dissecting aneurysm in 2014. After one year, the aneurysm was ruptured because of continuous distal flow of the false lumen. We performed TEVAR using the Candy plug technique, and he was discharged on the 11th postoperative day. The false lumen diameter was reduced. TEVAR using the Candy plug technique for chronic type B aortic dissection was thought to be useful in high-risk patients, but we need more careful observation.</p>

Valve-Sparing Root Replacement for Syphilitic Aortic Arch Aneurysm with Aortic Regurgitation / 日本心臓血管外科学会雑誌

Syphilitic aortic aneurysm became rare after the discovery of penicillin. Syphilitic aortitis involves the ascending aorta and dilates the aortic annulus, causing aortic valve regurgitation. We report a case of syphilitic aortic aneurysm with severe aortic valve regurgitation, which was successfully treated with the replacement of the valve-sparing root and the total arch. A 55-year-old man, admitted earlier to another hospital for colon diverticulum, was found to have an aortic arch aneurysm. Enhanced computed tomography revealed the aneurysm of the ascending aorta to the transverse arch aorta with the maximum short diameter of the aneurysm at 68 mm. He also had a saccular aneurysm in the ascending aorta. Although he had never had a history of syphilis, a routine laboratory test for syphilis was positive. That said, we looked upon this case as a syphilitic aortic aneurysm. In preoperative cardiac echography, the aortic regurgitation was severe with mild valve stenosis and mainly due to dilation of the aortic root. We thought the native valve could be spared and replaced both the valve-sparing root and the total arch. He was discharged on the 11th postoperative day without any complications.

Use of Aortic Valved Grafts for Apico-aortic Conduit Bypass / 日本心臓血管外科学会雑誌

We describe the case of a 60-year-old woman with severe aortic stenosis and severe calcification of the thoracic aorta, who underwent an apico-aortic conduit bypass using an aortic valved graft. Because of stenosis of the annulus of the aortic valve and severe calcification of the thoracic aorta (porcelain aorta), we did not perform ordinary aortic valve replacement. Instead, apico-aortic conduit bypass surgery was performed using a St. Jude Medical Aortic Valved Graft (19-20 mm : St. Jude Medical, St. Paul, MN, USA) and cardiopulmonary bypass (CPB) surgery was performed using descending aortic perfusion and left pulmonary artery drainage, while the subject was in the right decubitus position. The descending aorta was clamped and a 20-mm graft (Hemashield Platinum ; Boston Scientific/Medi-tech, Natick, MA, USA) was sutured to it. Under ventricular fibrillation, the left ventricular apex was circularly resected using a puncher with a diameter identical to that of the 20-mm graft, in order to create a new outflow for the conduit bypass. The graft was sutured to the outflow, and a torus-shaped equine pericardial sheet was used to reinforce the suture line. After recovery of the heartbeat, the aortic valved graft was first sutured to the graft at the outflow and then to the graft at the descending aorta. The CPB time was 285 min and ventricular fibrillation time was 36 min. Therefore, the benefits of using an aortic valved conduit for apico-aortic conduit bypass are reduced operation time, since there is no need to prepare a handmade valve conduit, and easy management of the grafts which are made of the same material.

Apicoaortic Conduit for Aortic Valve Stenosis after Coronary Bypass Grafting / 日本心臓血管外科学会雑誌

The patient was a 74-year-old man with a history of previous aorto-coronary bypass grafting 14 years previously. Echocardiography showed severe aortic valve stenosis. Computed tomography showed severe circumferential aortic calcification of the whole aorta, including the aortic root. Coronary cineangiography showed patency of the endoric graft. Avoiding graft injury and aortic cross clamping, we performed apicoaortic conduit. His postoperative course was uneventful, he was discharged very much improved on the 11th postoperative day. This procedure is useful in high risk patients with aortic valve stenosis.

Transapical Aortic Cannulation for Type A Acute Aortic Dissection / 日本心臓血管外科学会雑誌

The use of transapical aortic cannulation for arterial inflow during surgical repair of type A acute aortic dissection was evaluated. Thirty-six patients who underwent repair of type A aortic dissection were divided into 2 groups: those who underwent repair with transapical aortic cannulation (group A; 19 patients) and those who underwent repair with axillary and/or femoral artery cannulation (group C; 17 patients). Preoperative condition, estimated blood loss, transfusion requirements, and duration of the tube drainage and postoperative hospital stay did not differ in the 2 groups. Cannulations were successful in all patients, and none of the attempted inflow sites required moving to alternate sites in either group. The time to initiation of extracorporeal circulation (74.2±16.2min versus 88.8±12.5min, <i>p</i>=0.005) and the extracorporeal circulation time (175.2±55.5min versus 216.6±58.1min, <i>p</i>=0.036) was shorter in group A than in group C. However, the total operation time did not differ between the groups (309.3±112.5min in group A versus 363.4±130.9min in group C, <i>p</i>=0.198). All patients survived the operation, and there were no complications directly related to transapical aortic cannulation. Postoperative stroke tended to be lower in group A than in group C (5.3% versus 29.4%; <i>p</i>=0.081). There was 1 operative death in group A (5.3%) and 4 operative deaths in group C (23.5%) (<i>p</i>=0.167). These data demonstrate that the use of transapical aortic cannulation yielded more favorable results than other cannulation techniques for induction of extracorporeal circulation and for minimization of extracorporeal circulation time and postoperative morbidity. We conclude that transapical aortic cannulation represents a safe, effective and less invasive means of providing arterial inflow during cardiopulmonary bypass for patients undergoing surgical correction of type A aortic dissection.

A Case of Off-Pump Coronary Artery Bypass Grafting in a Patient with Idiopathic Thrombocytopenic Purpura / 日本心臓血管外科学会雑誌

A 63-year-old man with unstable angina and idiopathic thrombocytopenic purpura (ITP) underwent off-pump coronary artery bypass grafting after being admitted to our hospital because of angina pectoris. Coronary angiography performed on admission showed 90% stenosis of the left main coronary artery. High dose transvenous γ globulin therapy was performed for 3 days before surgery. The number of platelets, which was 2.3×10⁴/mm³ on admission increased to 4.1×10⁴/mm³ before surgery. Ten units of platelets were transfused intraoperatively, with little perioperative hemorrhage and no increased incidence of bleeding complications. The postoperative course was uneventful. High dose transvenous γ globulin therapy and operation without cardiopulmonary bypass were useful in facilitating the treatment of this ITP coronary artery bypass patient.