|Daiki Hirayama＊||Daisuke Hiraoka＊＊||Norihisa Yuge＊|
|Ryoji Kinoshita＊||Yohei Yamamoto＊＊＊||Hidetoshi Uchiyama＊＊＊|
|Susumu Manabe＊||Mashiro Ohnuki＊＊＊||Kazunobu Hirooka＊|
（Department of Cardiac Surgery, Tsuchiura Kyodo General Hospital＊, Tsuchiura, Japan, Department of Cardiovascular Surgery, Chiba University Hospital＊＊, Chiba, Japan, and Department of Vascular Surgery, Tsuchiura Kyodo General Hospital＊＊＊, Tsuchiura, Japan）
Non-occlusive mesenteric ischemia（NOMI）after cardiovascular surgery is a disease with a poor prognosis that is difficult to diagnose and treat. We report a case of NOMI diagnosed and treated immediately after open heart surgery. A 77-year-old man was admitted to our hospital due to heart failure. Echocardiography showed the diagnosis of severe aortic stenosis. He underwent surgery for the replacement of the aortic valve. After surgery, the hemodynamics became unstable and lactate continued to rise. Contrast abdominal computed tomography revealed a smaller SMV sign and ischemic area in the intestinal wall. We suspected NOMI, and continuous intravenous administration of prostaglandin was started. Angiography revealed scattered vascular stenosis in the superior and inferior mesenteric arteries, which led to the diagnosis of NOMI, and selective infusion of papaverine hydrochloride was started. Thereafter, hemodynamic improvement was observed and the patient was able to survive. To facilitate early diagnosis and treatment of NOMI, it is important to establish a protocol at the time of onset of illness to ensure smooth treatment.
Jpn. J. Cardiovasc. Surg. 50:301-304（2021）
|Atomu Hino＊||Azumi Hamasaki＊||Kozo Morita＊|
|Yuki Ichihara＊||Satoshi Saitou＊||Hiroshi Niinami＊|
（The Department of Cardiovascular Surgery, Tokyo Women Medical University＊, Tokyo, Japan）
A 61 year old woman who had been receiving treatment for ulcerative colitis for 14 years complained of respiratory discomfort on exertion and was diagnosed with severe mitral regurgitation due to mitral valve prolapse. Minimally invasive mitral valvuloplasty with right mini-thoracotomy was performed in our facility. Laboratory findings showed elevated levels of serum creatine kinase（CK）and CK-MB immediately after surgery. In addition to elevated levels of myocardial enzymes, ST depression was seen in an electrocardiogram on postoperative day 2;therefore, we suspected myocardial ischemia during the surgery. Despite the persistently elevated levels of myocardial enzymes, coronary angiography showed no significant abnormalities. Because of the possibility of false CK elevation, we performed CK electrophoresis, which revealed the presence of macro-CK type 1. CK-MB activity is often falsely elevated when determined by immune-inhibition in macro-CK patients, and that leads to the suspicion of myocardial ischemia. We considered that it may be highly difficult to identify macro-CK in a patient after cardiovascular surgery owing to elevated levels of myocardial enzymes in most such patients.
Jpn. J. Cardiovasc. Surg. 50:305-308（2021）
Keywords：cardiovascular surgery;macro creatine kinase;postoperative management
|Tomohito Kanzaki＊||Tomoyuki Goto＊||Taiji Watanabe＊|
（Department of Cardiovascular Surgery, Kyoto 2nd Red Cross Hospital＊, Kyoto, Japan）
Posterior ventricular septal perforation（VSP）is a severe complication of acute myocardial infarction（AMI). In some cases, it is difficult to manage residual shunts after VSP repair. We report a patient who required reoperation early after surgery due to a residual shunt and underwent successful repair through a newly devised maneuver. A 55-year-old man developed VSP after catheter intervention for AMI. He underwent VSP closure with extended sandwich repair via a right ventricular（RV）incision. A residual shunt was observed on the 4th day after surgery. Follow-up echocardiography showed progress of the residual shunt, and he developed cardiac failure;therefore, reoperation was performed 16 days after the initial surgery. The residual shunt was successfully repaired with only a reinforcing left ventricular（LV）side patch via an LV incision to extend between the LV side patch and septal myocardium without removing the RV side patch. The patient’s clinical course after reoperation was uneventful, and no residual shunt was observed on postoperative echocardiography.
Jpn. J. Cardiovasc. Surg. 50:309-313（2021）
Keywords：acute myocardial infarction;posterior ventricular septal perforation;residual shunt;right ventricular incision;extended sandwich technique
|Hanae Sasaki＊||Ryosuke Kowatari＊||Norihiro Kondo＊|
|Tomonori Kawamura＊||Masahito Minakawa＊|
（Hirosaki University Graduate School of Medicine Thoracic and Cardiovascular Surgery＊, Hirosaki, Japan）
A 68-year-old man visited a family physician with a complaint of epigastric pain lasting several hours. Computed tomography revealed an abdominal aortic aneurysm that was 60mm in length and a small amount of ascites, resulting in a tentative diagnosis of impending rupture of the abdominal aortic aneurysm. The patient was referred to our hospital and underwent emergency surgery. Intraoperative findings ruled out rupture and inflammatory changes in the abdominal aortic aneurysm. We observed the abdominal cavity and detected an internal hernia. The 15-cm-long ileum was incarcerated by an abnormal cord between the vesicorectal fossa and peritoneum. The cord was dissected to release the internal hernia. Intestinal peristalsis and pulsation of the marginal artery were maintained, allowing us to avoid intestinal resection. The patient reported that his epigastric pain disappeared soon after surgery. On the 24th postoperative day, the patient underwent abdominal aortic replacement. Our case suggests that internal hernia incarceration is an important differential diagnosis of impending rupture of an abdominal aortic aneurysm, even in cases with no history of laparotomy.
Jpn. J. Cardiovasc. Surg. 50:314-316（2021）
Keywords：abdominal aortic aneurysm;internal hernia
|Takashi Kato＊||Hirotsugu Fukuda＊||Wataru Moriyama＊|
|Masataka Ohashi＊||Shotaro Hirota＊||Masahiro Seki＊|
|Masahiro Teduka＊||Yusuke Takei＊||Hironaga Ogawa＊|
（Department of Cardiac and Vascular Surgery, Dokkyo Medical University Hospital＊, Tochigi, Japan）
The case is that of a 90-years-old man. A previous doctor performed abdominal graft replacement for an abdominal aortic aneurysm 5 years earlier and continued outpatient CT follow-up. Follow-up CT showed the right aortic arch and dilation of the thoracic aortic aneurysm, and the patient was referred to our hospital. Contrast-enhanced CT showed an aortic arch aneurysm;the aneurysm diameter was 62mm in major axis and 60mm in minor axis, which was judged to be suitable for surgery. It was a rare right-sided aortic arch with no congenital heart malformation and no situs inversus. Endovascular treatment was considered because he was 90 years old and very elderly, but there were concerns about the risk of embolism, irregular manipulation and central landing. For the surgical method, we selected total arch replacement using a frozen elephant trunk technique. We succeeded in avoiding serious complications by selecting an appropriate treatment method through careful evaluation.
Jpn. J. Cardiovasc. Surg. 50:317-321（2021）
Keywords：right aortic arch;total arch replacement;frozen elephant trunk
|Keita Hayashi＊||Takurin Akiyoshi＊＊|
（Department of Vascular Surgery, Hiratsuka City Hospital＊, Hiratsuka, Japan, and The Shonan Hiratsuka Varicose Vein Clinic＊＊, Hiratsuka, Japan）
A 52-year-old male was admitted to our hospital through the emergency room due to dyspnea and hypertensive heart failure. Computer tomography revealed atypical aortic coarctation with stenosis and calcification just above the superior mesenteric artery. Calcium channel blocker significantly reduced hypertension and improved heart failure, while his creatine elevated rapidly, and he presented acute renal failure. Endovascular self-expanding stent implantation in the aorta was performed in order to restore renal blood flow. The postoperative course was uneventful, and the patient was discharged on the third day after the procedure. The cardiac function recovered immediately, and the patient no longer required antihypertensive agents. There have been many reported cases of endovascular correction of atypical aortic coarctation overseas. Nevertheless, due to reimbursement issue in the health care system, the majority of atypical aortic coarctation cases in Japan are treated with open surgery. Endovascular treatment should be endorsed as an option for its short procedural time, minimal invasiveness and brief hospital stay.
Jpn. J. Cardiovasc. Surg. 50:322-327（2021）
Keywords：atypical aortic coarctation;endovascular treatment;peripheral artery disease;hypertensive heart failure
|Hiroki Moriuchi＊||Masaaki Koide＊||Yoshifumi Kunii＊|
|Minori Tateishi＊||Satoshi Okugi＊||Risa Shimbori＊|
（Department of Cardiovascular Surgery, Seirei Hamamatsu Hospital＊, Hamamatsu, Japan）
A 75-year-old man was referred to our hospital with a chief complaint of sudden back pain and fever. Enhanced CT showed a Kommerell diverticulum（KD）with right aortic arch and aberrant left subclavian artery（ALSA). It also showed type B aortic dissection with a closed false lumen and the horizontal diameter of the KD was 73mm. We decided on elective surgery because the size of the KD was so large;he also had aortic dissection and difficulty in swallowing due to compression of the esophagus. We avoided thoracotomy because it was challenging to approach to the KD and reconstruct the ALSA in situ. There also was the risk of injury to organs around the KD especially the esophagus and trachea via thoracotomy. Therefore, we performed an elective one-stage operation comprising total arch replacement（TAR）and frozen elephant trunk（FET）through median sternotomy followed by thoracic endovascular aortic repair（TEVAR). We could perform the operation safely with a good field of view. This strategy did not need a thoracotomy or in situ reconstruction of the ALSA. The post-operative course was uneventful and he was discharged 18 days after the operation. A CT scan 6 months after the operation showed size reduction of the thrombosed KD with no residual leakage of the stent graft. This hybrid method is one effective option for a KD with right aortic arch and ALSA. We report a successful one-stage hybrid operation for KD with some literature rview.
Jpn. J. Cardiovasc. Surg. 50:328-332（2021）
Keywords：Kommerell diverticulum;acute aortic dissection;hybrid operation
|Takenori Kojima＊||Shinji Miyamoto＊||Takashi Shuto＊|
|Keitaro Okamoto＊||Madoka Kawano＊||Tomoyuki Wada＊|
（Department of Cardiovascular Surgery, Oita University School of Medicine＊, Yufu, Japan）
We recorded a case of a 58-year-old man who presented with swelling of the right neck after sudden chest pain. He was diagnosed with Stanford type A aortic dissection. Computed tomography revealed an aneurysm in the innominate artery surrounded by a hematoma. We therefore suspected a rupture of the innominate artery. In addition, the right common carotid artery was almost completely obstructed due to dissection. An emergency partial arch replacement was performed. Cardiopulmonary bypass（CPB）was established with two blood supplies:the right axillary and left common femoral arteries. When CPB was started, the innominate artery ruptured and could no longer be used for cerebral perfusion or as an anastomotic site. The right side of the neck was opened, and a synthetic graft was anastomosed to the right common carotid artery for cerebral perfusion. Finally, the graft was anastomosed with a branch of the main trunk. The right subclavian artery was also reconstructed using a graft that was anastomosed to the axillary artery for blood supply. The postoperative course was favorable, and no cerebral complications were observed.
Jpn. J. Cardiovasc. Surg. 50:333-336（2021）
Keywords：acute aortic dissection;innominate artery rupture;total arch replacement;cerebral complication
|Masahiro Mizumoto＊||Tetsuro Uchida＊||Yoshinori Kuroda＊|
|Atsushi Yamashita＊||Eiichi Oba＊||Jun Hayashi＊|
|Shingo Nakai＊||Kimihiro Kobayashi＊||Tomonori Ochiai＊|
（Second Department of Surgery, Yamagata University Faculty of Medicine＊, Yamagata, Japan）
An 18-year-old man with hypoxic encephalopathy was admitted because of recurrent minor bleeding a tracheal stoma, which was suspected as a tracheo-innominate artery fistula（TIF). He had undergone tracheostomy and gastrostomy 2 years prior and had mild opisthotonos and scoliosis. Although tracheal endoscopy showed no tracheal mucosal erosion, necrosis, or granulation tissue formation, contrast-enhanced computed tomography（CT）revealed a close contact between the innominate artery and the anterior wall of the trachea, and an equal height between the innominate artery and the tip of the tracheal cannula. Magnetic resonance angiography of the head showed dominant intracranial blood flow from the left internal carotid and vertebral arteries. Preventive innominate artery transection through the supra-sternal approach without sternotomy or reconstruction of the innominate artery was performed for this high-risk case of TIF. The patient’s postoperative course was uneventful. Postoperative CT revealed that the innominate artery was transected and isolated from the site of tracheostomy. The preserved connection between the right common carotid and subclavian artery at the distal sutured stump helped maintain blood flow in the right internal and middle cerebral arteries. The patient was discharged on postoperative day 9 without any new neurological complications or bleeding from a tracheal stoma. TIF is a rare but fatal complication after laryngotracheal separation or tracheostomy. It is important to prevent the onset of TIF, however, there are no criteria for preventive innominate artery transection. Our preventive innominate artery transection through the supra-sternal approach is considered as one of the useful surgical treatment for high-risk cases of TIF accompanied by severe neuromuscular disorders.
Jpn. J. Cardiovasc. Surg. 50:337-341（2021）
Keywords：tracheo-innominate artery fistula;innominate artery transection;prevention;suprasternal approach
|Kenichi Arata＊||Itsumi Imagama＊||Yoshiya Shigehisa＊|
|Kosuke Mukaihara＊||Kenji Toyokawa＊||Tomoyuki Matsuba＊|
|Shinya Kuramoto＊||Shuji Nagatomi＊||Yutaka Imoto＊|
（Cardiovascular and Gastroenterological Surgery, Kagoshima University Graduate School of Medical and Dental Sciences＊, Kagoshima, Japan）
We sometimes encounter the case that we have to make an anastomosis between a prosthetic graft and an autologous vein graft in revascularization of a lower extremity. However, it is said that the intimal hyperplasia in the anastomosis site of a prosthetic graft and autologous vein graft has a tendency to become severe in the long term postoperatively. We herein report a case in which a vein cuff（St. Mary’s boot）technique was very useful to prevent recurrent stenosis due to intimal hyperplasia. No recurrence of stenosis in repair lesion has been detected for 7.5 years after operation.
Jpn. J. Cardiovasc. Surg. 50:342-347（2021）
Keywords：anastomotic intimal hyperplasia;vein cuff technique;lower extremity bypass
|Takafumi Abe＊||Kumiko Wada||Eigo Ikushima|
|Syotaro Higa||Hiromitsu Teratani||Syuji Nagatomi|
|Katsuya Kawagoe||Hirofumi Yamamoto||Takeaki Harada|
（Department of Cardiovascular Surgery, Almeida Memorial Hospital＊, Oita, Japan).
In the U-40 column, we conducted a questionnaire survey of the U-40 generation on the theme of the specialist system for cardiovascular surgery and reported on the present condition and problems in obtaining certification. With the introduction of a new system, off the job training and participatory training using extracorporeal circulation techniques were newly mandated. In this article, we report the results and discussion of the questionnaire survey regarding the present condition of extracorporeal circulation training for the U-40 generation and the pros and cons of training programs.
Jpn. J. Cardiovasc. Surg. 50（5）:U1-U5（2021）
Keywords：extracorporeal circulation;board-certified cardiovascular surgeon;U-40