Annals of Thoracic and Cardiovascular Surgery
Online ISSN : 2186-1005
Print ISSN : 1341-1098
ISSN-L : 1341-1098
Volume 28, Issue 1
Displaying 1-12 of 12 articles from this issue
Review Articles
  • Taira Yamamoto, Daisuke Endo, Satoshi Matsushita, Akie Shimada, Keisuk ...
    2022 Volume 28 Issue 1 Pages 1-17
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: July 31, 2021

    This review aimed to discuss the anatomical properties of the left atrial appendage (LAA), its relationship with atrial fibrillation (AF), effectiveness of LAA occlusion (LAAO), techniques, and new devices used to perform this procedure. An electronic search was performed to identify studies, in the English language, on LAA management. Searches were performed on PubMed Central, Scopus, and Medline from the dates of database inception to February 2020. For the assessed papers, data were extracted from the reviewed text, tables, and figures, by two independent authors. Anticoagulant therapy for patients with AF has proven beneficial and is highly recommended, but it is challenging for many patients to maintain optimal treatment. Surgery is the most cost-effective option; surgical methods include simple LAA resection, thoracoscopic surgery, and catheter treatment. Each procedure has its advantages and disadvantages, and many prospective studies have been conducted to evaluate various treatment methods. In managing the LAA, dissection of the LAA, such as changes in its shape and size due to remodeling during AF, changes in autonomic nerve function, and thrombosis, must be understood anatomically and physiologically. We believe that early treatment intervention for the LAA should be considered particularly in cases of recurrent AF.

    Download PDF (10092K)
  • Jianqi Hao, Jian Zhou, Wenying Xu, Cong Chen, Jian Zhang, Haoning Peng ...
    2022 Volume 28 Issue 1 Pages 18-31
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: August 20, 2021

    Objective: The purpose of this article was to assess the benefit of perioperative administration of the intravenous beta-blocker landiolol hydrochloride in preventing atrial fibrillation (AF) after cardiothoracic surgery.

    Methods: We performed a systematic search in PubMed, Web of Science, CNKI, and OVID to identify randomized controlled trials (RCTs) and cohorts up to January 2021. Data regarding postoperative atrial fibrillation (POAF) and safety outcomes were extracted. Odds ratios (ORs) with 95% confidence intervals (CIs) were determined using the Mantel–Haenszel method. Meanwhile, subgroup analyses were conducted according to surgery type including lung cancer surgery, esophageal cancer surgery, and cardiac surgery.

    Results: Seventeen eligible articles involving 1349 patients within 13 RCTs and four cohorts were included in our meta-analysis. Compared with control group, landiolol administration was associated with a significant reduction of the occurrence of AF after cardiothoracic surgery (OR = 0.32, 95% CI 0.23–0.43, P <0.00001). In addition, the results demonstrated that perioperative administration of landiolol hydrochloride minimized the occurrence of postoperative complications (OR = 0.48, 95% CI 0.33–0.70, P = 0.0002). Funnel plots indicated no obvious publication bias.

    Conclusions: Considering this analysis, landiolol was effective in the prevention of AF after cardiothoracic surgery and did not increase the risk of major postoperative complications.

    Download PDF (4984K)
New Methods
  • Daisuke Hokka, Yugo Tanaka, Nahoko Shimizu, Takefumi Doi, Yoshimasa Ma ...
    2022 Volume 28 Issue 1 Pages 32-35
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: August 25, 2021

    Adhesiolysis is often necessary in intrathoracic adhesion during ipsilateral repeat lung resection. This procedure has a risk of surgical complications, including unintentional intraoperative damage of the pulmonary vessels or lung parenchyma. We used an oxidized regenerated cellulose (ORC) sheet to prevent intrathoracic adhesion after lung resection in 55 patients. The sheet was placed on the surface of the resected region and on the lung surface under the wound. No major postoperative complications were observed. Three cases underwent ipsilateral thoracic surgery for the treatment of lung malignancies, and there were no intrathoracic adhesions around the ORC sheet-covered area.

    Download PDF (1078K)
  • Shunsuke Sato, Takashi Azami, Tatsuya Kawamoto, Kyozo Inoue, Kenji Oka ...
    2022 Volume 28 Issue 1 Pages 36-40
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: August 04, 2021

    Purpose: To discuss minimally invasive cardiac surgery aortic valve replacement (MICS-AVR) approach via anterior thoracotomy using continuous retrograde cardioplegia. Continuous retrograde cardioplegia facilitates excellent continuous homogeneous cooling of the heart during cardiac arrest.

    Methods: We performed AVR using the proposed method in nine patients between June 2018 and September 2019. The median age of the patients was 73 (range: 43–84) years. The pleural space was entered via anterior thoracotomy. After opening of the right atrium, a retrograde cardioplegic cannula was inserted into the coronary sinus with a purse-string suture. Continuous cold blood retrograde cardioplegia was initiated at 700 mL/h.

    Results: Extubation in the operating room was performed in five (56%) patients. No new decreased function of the left and right ventricles was observed in intraoperative transesophageal echography or transthoracic echocardiogram.

    Conclusion: MICA-AVR through continuous retrograde cardioplegia is a safe technique.

    Download PDF (890K)
Original Articles
  • Taozhen He, Xiaoyan Sun, Zhong Zhang, Bing Xu, Wenying Liu
    2022 Volume 28 Issue 1 Pages 41-47
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: July 28, 2021

    Purpose: Pulmonary parenchyma saving method (cystotomy and enucleation) has been globally accepted in lung hydatidosis. However, whether capitonnage is performed or not after cystotomy is still controversial. This study aims to improve the diagnosis and treatment of patients.

    Methods: We retrospectively analyzed the data of 12 pediatric patients with pulmonary hydatid cysts. These 12 patients (10 males and 2 females), with an average age of 8.7 years, underwent cystotomy without capitonnage. The mean follow-up period was 36 months.

    Results: Among the 12 patients, 10 underwent thoracotomy cystotomy and 2 underwent thoracoscopic surgery with excellent outcomes except one case of postoperative broncho-pleura fistula, which was treated through thoracoscopic surgery. The mean hospital stay was 8 days. No death or recurrence occurred during the follow-up period.

    Conclusion: Good therapeutic effect can be expected by combining cystotomy of pulmonary hydatid cysts with postoperative anti-hydatid drug therapy. For those unruptured (uncomplicated) hydatid lung cysts, cystotomy with the non-capitonnage method seems to be the best option, which needs to be verified by well-designed studies.

    Download PDF (762K)
  • Jing Wang, Wen-Peng Xie, Yu-Qing Lei, Ling-Shan Yu, Zeng-Chun Wang, Hu ...
    2022 Volume 28 Issue 1 Pages 48-55
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: July 23, 2021

    Objective: To investigate the safety and effectiveness of extraluminal placement of a bronchial blocker compared with carbon dioxide (CO2) artificial pneumothorax in infants undergoing video-assisted thoracoscopic surgery (VATS).

    Methods: The study involved 33 infants (group A) who underwent one-lung ventilation (OLV) with extraluminal placement of a bronchial blocker and 35 other infants (group B) who underwent CO2 artificial pneumothorax. Clinical characteristics, the degree of lung collapse, and complications were compared.

    Results: The degree of lung collapse in group A was significantly higher than that in group B at T2 and T3. The mean arterial pressure (MAP) of group B was significantly lower than that of group A at 10 min and 30 min after OLV. The partial pressure of carbon dioxide (PaCO2) of group B was significantly higher than that of group A at 30 min after OLV. The incidence of hypotension in group B was higher than that in group A.

    Conclusion: Compared with CO2 artificial pneumothorax, extraluminal placement of a bronchial blocker is associated with a better degree of lung collapse, fewer episodes of hypotension, and lower PaCO2 accumulation during OLV in infants undergoing VATS.

    Download PDF (741K)
  • Akihiro Masuzawa, Tomomitsu Takagi, Hirokuni Arai, Goro Matsumiya, Shu ...
    2022 Volume 28 Issue 1 Pages 56-62
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: August 02, 2021

    Objective: Mitral subvalvular procedures in addition to restrictive annuloplasty are promising for ischemic mitral regurgitation (IMR). However, the prevalence and efficacy of specific subvalvular repair in severe IMR have not been elucidated. This is the first nationwide survey regarding surgeons’ attitudes toward IMR in Japan.

    Methods: A questionnaire was sent to 543 institutions. From 2015 to 2019, numbers of elective first-time mitral valve replacement (MVR) with/without complete chordal preservation (CCP)/papillary muscle approximation (PMA) and mitral valvuloplasty (MVP) with/without papillary muscle relocation (PMR)/PMA in patients with severe IMR were collected. Concomitant procedures for coronary artery, tricuspid valve, and arrhythmia could be included but left ventricular reconstruction was excluded.

    Results: Completed questionnaires were received from 286 institutions (52.7%). The majority (90%) had less than 20 cases within 5 years. The number of MVP (1413, 61.5%) surpassed MVR (886, 38.5%). CCP was performed in half of MVR (50.0%), while PMA was included in only 1.9% of MVR. PMA and PMR were also performed infrequently, in only 7.7% and 10.9% of MVP, respectively.

    Conclusion: Japanese surgeons aggressively perform MVP for severe IMR. Subvalvular repair was also aggressively performed in addition to MVR, but not to MVP. A multicenter registry study is in progress.

    Download PDF (1135K)
  • Dai Tasaki, Hirokuni Arai, Kenji Yokoyama, Tomoya Yoshizaki
    2022 Volume 28 Issue 1 Pages 63-71
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: January 17, 2022

    Purpose: Saphenous vein graft (SVG) is the most commonly used conduits in coronary artery bypass grafting (CABG), but the disadvantage of SVG is its tendency for progressive failure. We hypothesized that therapeutic-dose warfarin (international normalized ratio [INR] >1.6) plus aspirin improve SVG patency. This study aimed to evaluate the factors contributing to SVG patency.

    Methods: Since 2010–2020, 199 patients who underwent isolated CABG using SVG were divided into two groups according to their INR values in the first year: group T (INR >1.6) and group L (INR <1.6).

    Results: Group T had 162 SVGs (105 patients) and group L had 151 SVGs (94 patients). The 1-, 4-, and 7-year SVG patency rates were higher in group T than in group L (99%, 96%, and 92% vs. 93%, 86%, and 79%, respectively; p = 0.00378). The 1-, 4-, and 7-year freedom from repeat-revascularization was higher in group T than in group L (100%, 100%, and 99% vs. 98%, 95%, and 87%, respectively; p = 0.0264). Multivariate analysis showed that therapeutic-dose warfarin (p = 0.00204) and target vessel diameter (p <0.0001) were independent risk factors of SVG occlusion.

    Conclusion: Therapeutic-dose warfarin (INR >1.6) plus aspirin after CABG improved the long-term patency of SVG and decreased repeat-revascularization rate.

    Download PDF (1035K)
Case Reports
  • Daisuke Sato, Sohei Hayashi, Shozo Sakata, Riken Kawachi, Mie Shimamur ...
    2022 Volume 28 Issue 1 Pages 72-74
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: August 23, 2019

    Mediastinal ectopic goiter is a thyroid tumor that lies entirely below a plane extending from the superior surface of the first thoracic vertebra to the suprasternal notch, and commonly lies in the vicinity of the thymus. Intrapericardial ectopic goiter is extremely rare. We present an extremely rare case of a 63-year-old woman with an intrapericardial ectopic goiter and review the pertinent literature.

    Download PDF (2257K)
  • Chika Nakashima, Hiroaki Harada, Satoshi Shibata
    2022 Volume 28 Issue 1 Pages 75-78
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: September 20, 2019

    Spontaneous hemothorax caused by the rupture of a benign schwannoma has rarely been reported. Herein, we present the successful excision of an extremely rare case of mediastinal ancient schwannoma causing intrathoracic bleeding. A 27-year-old man was admitted to our emergency department because of back pain and dyspnea. Computed tomography revealed massive pleural effusion with a posterior mediastinal tumor. We performed a resection of the tumor which had ruptured, and the tumor was diagnosed as an ancient schwannoma.

    Download PDF (3075K)
  • Valentin Govedarski, Elitsa Dimitrova, Emil Hadzhiev, Borislav Denchev ...
    2022 Volume 28 Issue 1 Pages 79-82
    Published: 2022
    Released on J-STAGE: February 20, 2022
    Advance online publication: December 06, 2019

    Bilateral aorto-profunda femoris bypass with Dacron bifurcation graft was performed by a patient with aortoiliac occlusive disease (AIOD) and horseshoe kidney (HSK) who had undergone stenting of the right common iliac artery and of the left superficial femoral artery with subsequent stent thrombosis as well as significant subrenal aortic stenosis. As endovascular treatment was not feasible and surgical treatment by means of transperitoneal incision would be associated with high risk of damage to the HSK, the operation was successfully accomplished through left pararectal retroperitoneal approach.

    Download PDF (1216K)