• Journal of Chest Surgery
• /
• v.43 no.3
• /
• pp.304-307
• /
• 2010

A 5-day-old neonate (body weight=2.4 kg) with coarctation of the aorta and critical aortic stenosis underwent an interventional balloon valvuloplasty for aortic stenosis. During the intervention, cardiac arrest occurred due to injury of the right carotid artery by the guide wire. An extracorporeal membrane oxygenator (ECMO) was applied. After 1 day's support, total surgical correction was achieved; however, in the immediate postoperative period, cardiac function was severely depressed. We applied a bi-ventricular assist device (bi-VAD) instead of an ECMO and we were able to wean the patient off the bi-VAD device after 3 days' support. The patient was discharged without severe complications.

• Journal of Chest Surgery
• /
• v.40 no.8
• /
• pp.578-581
• /
• 2007

A 59-year old female patient was admitted due to massive hemoptysis. 6-months previously, we performed ascending aorta graft interposition for terating Debakey type 1 acute aortic dissection. Chest CT scan showed the fistula between the descending thoracic aorta and the left lower lobe. We performed descending thoracic aorta graft interposition under cardiopulmonary bypass. She recovered well without any postoperative problems. Distal aorto-bronchial fistula after a previous aortic operation is very rare. We report here the good results of treating aorto-bronchial fistula because we recognized this lesion early and performed an early operation.

• Journal of Chest Surgery
• /
• v.38 no.2 s.247
• /
• pp.164-167
• /
• 2005

Quadricuspid aortic valve is a rare congenital abnormality but it is well recognized as the cause of significant aortic regurgitation. We describe 5 patients who underwent surgery for severe aortic regurgitation associated with quadricuspid valve. In all patients, this abnormality had been incidentally detected during surgery. Two of the patients had infective endocarditis. In accordance with the Hurwitz and Roberts classification, two valves were type d, two were type a, and one was type c.

• Journal of the Institute of Convergence Signal Processing
• /
• v.23 no.2
• /
• pp.62-69
• /
• 2022

An electrocardiogram (ECG) is one of the most important biosignals, and in particular, continuous ECG monitoring is very important in patients with arrhythmia. There are many different types of arrhythmia (sinus node, sinus tachycardia, atrial premature beat (APB), and ventricular fibrillation) depending on the cause, and continuous ECG monitoring during daily life is very important for early diagnosis of arrhythmias and setting treatment directions. The ECG signal of arrhythmia patients is very unstable, and it is difficult to detect the R-peak point, which is a key feature for automatic arrhythmias detection. In this study, we develped a continuous measuring Holter ECG monitoring device and software for analysis and confirmed the utility of R-peak of the ECG signal with MIT-BIH arrhythmia database. In future studies, it needs the validation of algorithms and clinical data for morphological classification and prediction of arrhythmias due to various etiologies.

• Journal of the korean veterinary medical association
• /
• v.40 no.2
• /
• pp.145-156
• /
• 2004

심부정맥(Cardiac arrhythmia)이란 심장내 박동, 율동, 충동 발생 및 전도장애를 유도하는 질환을 말하며, 주로 심근경색이나 심장비대증 같은 심장의 해부학적 질환과 약물중독 및 전해질 불균형에 의해 발생한다. 부정맥은 정상적인 심근 활성을 차단하여 심장박출을 감소시키므로 때로 생명을 위협하기도 한다. 본 종설에서는 심장의 전도계에 관련된 정상생리와 부정맥의 병리적 발생기전 및 부정맥 치료제에 대한 분류 및 약리기전에 대해 기술하고자 한다.

• KOREAN POULTRY JOURNAL
• /
• v.50 no.6
• /
• pp.136-139
• /
• 2018

여름이 성큼 다가오면서 단열에 대한 중요성이 더욱 커지고 있다. 주식회사 바이오맥(脈)(대표 김홍중)은 혹한기에 접어들면서 전국을 상대로 특수 단열재인 인슐래드를 보급하는데 바쁜 나날을 보내고 있다. 인슐래드가 단열에 큰 효과를 주고 있다는 것을 대부분의 농가들이 인식을 하고 있기 때문이다. 본고는 단열에 탁월하다는 인슐래드에 대해 알아보고 혹서기에 대비해 농가들이 주지해야 할 사항 등을 경기도 수원에 본사를 둔 바이오맥을 찾아 짚어보았다.

• Journal of Chest Surgery
• /
• v.39 no.6 s.263
• /
• pp.440-448
• /
• 2006

Background: Surgery of descending thoracic or thoracoabdominal aorta has the potential risk of causing neurological injury including spinal cord damage. This study was designed to find out the risk factors leading to spinal cord and brain damage after surgery of descending thoracic and thoracoabdominal aorta. Material and Method: Between October 1995 and July 2005, thirty three patients with descending thoracic or thoracoabdominal aortic disease underwent resection and graft replacement of the involved aortic segments. We reviewed these patients retrospectively. There were 23 descending thoracic aortic diseases and 10 thoracoabdominal aortic diseases. As an etiology, there were 23 aortic dissections and 10 aortic aneurysms. Preoperative and perioperative variables were analyzed univariately and multivariately to identify risk factors of neurological injury. Result: Paraplegia occurred in 2 (6.1%) patients and permanent in one. There were 7 brain damages (21%), among them, 4 were permanent damages. As risk factors of spinal cord damage, Crawford type II III(p=0.011) and intercostal artery anastomosis (p=0.040) were statistically significant. Cardiopulmonary bypass time more than 200 minutes (p=0.023), left atrial vent catheter insertion (p=0.005) were statistically significant as risk factors of brain damage. Left heart partial bypass (LHPB) was statistically significant as a protecting factor of brain (p=0.032). Conclusion: The incidence of brain damage was higher than that of spinal cord damage after surgery of descending thoracic and thoracoabdominal aorta. There was no brain damage in LHPB group. LHPB was advantageous in protecting brain from postoperative brain injury. Adjunctive procedures to protect spinal cord is needed and vigilant attention should be paid in patients with Crawford type II III and patients who have patent intercostal arteries.

• Clinical and Experimental Pediatrics
• /
• v.53 no.4
• /
• pp.532-537
• /
• 2010

Purpose : Early postoperative arrhythmias are a major cause of mortality and morbidity after open heart surgery in the pediatric population. We evaluated the incidence and risk factors of early postoperative arrhythmias after surgery of congenital heart disease. Methods : From January 2002 to December 2008, we retrospectively reviewed the medical records of the 561 patients who underwent cardiac surgery in Kyungpook National University Hospital. We analyzed patients' age and weight, occurrence and type of arrhythmia, cardiopulmonary bypass (CPB) time, aortic cross clamp (ACC) time, and postoperative electrolyte levels. Results : Arrhythmias occurred in 42 of 578 (7.3%) cases of the pediatric cardiac surgery. The most common types of arrhythmia were junctional ectopic tachycardia (JET) and accelerated idioventricular rhythm (AIVR), which occurred in 17 and 13 cases, respectively. The arterial switch operation (ASO) of transposition of the great arteries (TGA) had the highest incidence of arrhythmia (36.4%). Most cases of cardiac arrhythmia showed good response to management. Patients with early postoperative arrhythmias had significantly lower body weight, younger age, and prolonged CPB and ACC times ($P$<0.05) than patients without arrhythmia. Although the mean duration of ventilator care and intensive care unit stay were significantly longer ($P$<0.05), the mortality rate was not significantly different among the 2 groups. Conclusion : Early postoperative arrhythmias are a major complication after pediatric cardiac surgery; however, aggressive and immediate management can reduce mortality and morbidity.

• Journal of Chest Surgery
• /
• v.40 no.10
• /
• pp.667-673
• /
• 2007

Background: Patients with severe aortic valve disease frequently display mitral valve regurgitation (MR). In such patients, the clinical course of MR after isolated aortic valve replacement (AVR) may be important for determining the treatment strategies. After isolated AVR, the change of the concomitant moderate degree or less of MR according to the type of aortic valve disease is not known well. The aim of this study was to analyze the post-operative changes of MR after performing AVR in those patients with severe AS (Group S) and those with severe AR (Group R). Material and Method: We retrospectively evaluated 43 patients with severe aortic disease and a moderate degree or less of mitral valve regurgitation, and these patients underwent isolated aortic valve replacement from January 1996 to June 2005. The patients were divided into two groups: the aortic valve stenosis group (n = 29) and the aortic valve regurgitation group (n = 14). The patients underwent transthoracic echocardiography preoperatively and at 7 days, $6{\sim}10$ months and more than 18 months (mean follow-up duration: 38 months) postoperatively. Result: The mean age was 60.9 years (Group S: 62 years, Group R: 52.5 years) and 60% (Group S=55%, Group R=71%) of the patients were male. The preoperative MR was mild in 29 (67.5%), mild to moderate in 11 (25.5%), and moderate in 3 (6.9%) patients. In the Group S patients, MR improved in 16 (55%) patients at the immediate postoperative days and in 17 (59%) patients at more than 18 months postoperatively. On the other hand, all the Group R patients exhibited earlier improvement. The decrease of LA size had a similar pattern to the MR change, but there were no significant differences in the change of the ejection fraction of the two groups. Conclusion: In the patients with severe aortic valve disease and concomitant low grade MR, the MR after AVR improved earlier and more effectively in the patients with AR than in those patients with AS.

• Journal of Chest Surgery
• /
• v.38 no.9 s.254
• /
• pp.637-639
• /
• 2005

There are several methods of repairing in aortic periprosthetic leakage after aortic valve replacement. We present a case in with the aortic periprosthetic leakage with pseudoaneurysm was repaired with dacron patch.