Search

Your search keyword '"Kamohara, Keiji"' showing total 333 results
Start Over Author "Kamohara, Keiji"
333 results on '"Kamohara, Keiji"'

7. Transcarotid-transcatheter aortic valve implantation in a patient with low cardiac function and haemodialysis accompanied by intracranial carotid stenosis: a case report.

Author

Hayashi, Nagi, Yunoki, Junji, Baba, Kouhei, Morokuma, Hiroyuki, and Kamohara, Keiji

Subjects
HEART valve prosthesis implantation, CAROTID artery stenosis, AORTIC valve, INTERNAL carotid artery, CORONARY artery surgery, CEREBRAL infarction
Abstract

Background In transcatheter aortic valve implantation, the transfemoral approach is commonly used, but challenging access and procedural difficulties are sometimes encountered. Among alternatives, the transcarotid approach is increasingly used. We present a case of transcatheter aortic valve implantation in which a left common carotid approach achieved favourable outcomes in a patient with low cardiac function and dialysis. Case summary The patient was a 67-year-old woman with a history of coronary artery bypass surgery and dialysis. Heart failure secondary to aortic stenosis and hypotension during dialysis required surgery. Echocardiography indicated severe aortic stenosis with low-flow low-gradient. Access was problematic, with 4.0 mm diameter calcified external iliac arteries. Severe calcific stenosis was observed in the left subclavian artery, and the presence of right internal thoracic artery bypass rendered the bilateral subclavian artery approach unsuitable. Given the history of open-heart surgery and reduced left ventricular function, the carotid approach was chosen; however, both internal carotid arteries showed moderate stenosis. Carotid compression magnetic resonance angiography confirmed intracranial communication, so we chose access through the more severely stenosed left common carotid artery. Under preoperative extracorporeal membrane oxygenation and general anaesthesia, transcatheter aortic valve implantation was performed with a Sapien3 Ultra RESILIA 23 mm valve. Postoperatively, there was no symptomatic cerebral infarction, and the dialysis-related hypotension resolved. Discussion Even with intracranial carotid stenosis, flow evaluations, such as Matas test magnetic resonance imaging assessments, can reduce the cerebral infarction risk during transcarotid-transcatheter aortic valve implantation, providing a potentially safe and minimally invasive alternative access. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

14. TAVI後の感染性心内膜炎に対する治療経験

Author

Tokushima, Mika, primary, Morokuma, Hiroyuki, additional, Baba, Kohei, additional, Takeuchi, Yuki, additional, Hayashi, Nagi, additional, Jinnouchi, Kouki, additional, Koga, Shugo, additional, Yunoki, Junji, additional, and Kamohara, Keiji, additional

Published
2024
Full Text
View/download PDF

19. Development of an application for management of drug holidays in perioperative periods

Author

Kimura, Sakiko, Emoto, Akiko, Yoshimura, Mariko, Arimizu, Kota, Kamura, Tomoko, Sogawa, Rintaro, Mizuta, Kikumi, Tagomori, Yasuhiro, Natsuaki, Masahiro, Kajiwara, Masataka, Tsuruoka, Nanae, Yakushiji, Yusuke, Tanigawa, Yoshinori, Takamatsu, Chihiro, Danjo, Atsushi, Kamohara, Keiji, Hirakawa, Naomi, Sakaguchi, Yoshiro, Noguchi, Mitsuru, Noshiro, Hirokazu, Kawaguchi, Atsushi, Sueoka, Eisaburo, Narisawa, Yutaka, and Kimura, Shinya

Published
2020
Full Text
View/download PDF

29. How to select the optimal size of frozen elephant trunk in total arch replacement for type A acute aortic dissection.

Author

Morokuma, Hiroyuki, Hamada, Kouhei, Shimauchi, Kouta, Osaki, Jun, Takahashi, Baku, Yamamoto, Hiroaki, Hayashi, Nagi, Jinnouchi, Kouki, Itoh, Manabu, Yunoki, Junji, and Kamohara, Keiji

Abstract

Background: Total arch replacement (TAR) with a frozen elephant trunk (FET) is a common technique for acute aortic dissection, but there is no consensus on the optimal size of the FET. Methods: Forty-four patients who underwent TAR with FET for acute aortic dissection at our hospital since 2014 were included. The aortic diameter obtained from FET was measured on postoperative computed tomography (CT) and the estimated oversizing ratio was calculated. We investigated the relationship between the estimated oversizing ratio and postoperative outcomes. We also measured the maximum true lumen diameter, circumference of the true lumen, and total aortic diameter at the same level as the FET end on preoperative CT and examined the correlation with the aortic diameter obtained from FET. Results: The average estimated oversizing ratio was 109%. Early postoperative CT showed complete thrombosis of the false lumen in 41 (93.2%) patients. No distal stent graft-induced new entry occurred during follow-up. The correlation coefficients between the three measurements and aortic diameter obtained from FET were 0.64 (maximum true lumen diameter), 0.76 (true lumen diameter calculated from circumference), and 0.72 (total aortic diameter), respectively. Conclusions: The aortic diameter obtained from FET on postoperative CT was strongly correlated with the true lumen diameter calculated from the circumference and total aortic diameter on preoperative CT. It is reasonable to select a size of approximately 130% of the true lumen diameter calculated from the circumference or 80% to 85% of the total aortic diameter. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results