• Investigative Magnetic Resonance Imaging
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• 제22권1호
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• pp.71-77
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• 2018

Purpose: To develop a two-dimensional (2D) image-based respiratory motion correction technique for free-breathing coronary magnetic resonance angiography (MRA). Materials and Methods: The proposed respiratory navigator obtained aliased a 2D sagittal image from under-sampled k-space data and utilized motion correlation between the aliased images. The proposed navigator was incorporated into the conventional coronary MRA sequence including the diaphragm navigator and tested in three healthy subjects. Results: The delineation of major coronary arteries was significantly improved using the proposed 2D motion correction (S/I and A/P) compared to one-dimensional (S/I) correction using the conventional diaphragm navigator. Conclusion: The 2D image-based respiratory navigator was proposed for free-breathing coronary angiography and showed the potential for improving respiratory motion correction compared to the conventional 1D correction.

• Journal of Chest Surgery
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• 제23권1호
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• pp.162-168
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• 1990

Unroofed coronary sinus syndrome is an uncommon anomaly which is caused by incomplete formation of the left atriovenous fold and it is usually associated with persistent left superior vena cava. It may be diagnosed by cardiac catheterization and cineangiography but, if it is not diagnosed, it can bring out significant complications due to right to left shunt, such as brain abscess, cerebral embolism, transient ischemic attack, arterial desaturation and there will reduced patient`s life expectancy. Therefore corrective operation was needed. A case of unroofed coronary sinus syndrome which combines with valvular heart disease was experienced at the department of thoracic & cardiovascular surgery of Kosin medical college. The patient was 49 years old female and she complained dyspnea on exertion for 2 yrs. Cardiac catheterization with cineangiography and both superior venacavogram were performed for diagnosis and she was diagnosed as unroofed coronary sinus syndrome combined with mitral and tricuspid regurgitation. Surgical correction was accomplished by reroofing of coronary sinus with pericardial patch, closure of atrial septal defect and annuloplasty of both atrioventricular valves. Postoperative results were satisfactory and course of recovery was uneventful. We report a case of unroofed coronary sinus syndrome with review.

• Journal of Chest Surgery
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• 제23권1호
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• pp.158-161
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• 1990

A congenital coronary artery fistula is an uncommon anomaly which has a direct communication between a coronary artery and the lumen of any one of the four cardiac chambers, or the coronary sinus, or its tributary veins or the superior vena cava. The right coronary artery is involved most frequently, and the abnormal communication in most often is to the right ventricle followed in incidence by drainage into the right atrium and the pulmonary artery. Recently. we experienced a case of congenital coronary artery fistula associated with valvular heart disease. The fistulous communication was noted between the left circumflex artery and the left atrial appendage. Under the cardiopulmonary bypass, the internal obliteration of the left atrial appendage, mitral valve replacement, and aortic valve exploration were accomplished. Postoperative hospital course was uneventful and the patient was discharged without any problems.

• Journal of Chest Surgery
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• 제20권1호
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• pp.218-222
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• 1987

Unroofed coronary sinus syndrome is an uncommon anomaly, Unroofed coronary sinus syndrome is caused by incomplete formation of the left atriovenous fold, and it usually is associated with Left SVC. If it is not diagnosed, a residual reversed or bidirectional shunt will result, and its complications will reduce life expectancy. We experienced 3 cases of unroofed coronary sinus syndrome which combines TOF with PLSVC, partial ECD, primum type ASD. In case of Unroofed coronary sinus syndrome which combines TIF with PLSVC, preoperative diagnosis was not made. In corrective operation for TOF of this case, pump weaning was failed due to hypoxia and cardiac arrest, and he expired at operation room. At autopsy of this case, complete unroofed coronary sinus was found. In the other 2 cases, partial unroofed coronary sinus syndrome was found in operation field and corrective operation was performed successfully. We report these 3 experiences with its review. ^u ++ Noninvasive Assessment of Pressure Gradients across Prosthetic Heart Valve by Doppler Ultrasound - A comparative study of the Duromedics Bileaflet Valves in mitral position and Normal Mitral Valves -with its review.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.331-334
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• 2004

In clinical use, coronary stents keep coronary arteries open after expansion with a balloon catheter and prevent the expanded artery from collapsing. Coronary stents are positioned in artery by catheter with a balloon along a guide wire to the lesion site. Flexibility is one of important ability for delivery. In this paper, Palmaz-Schatz stent and Tenax complete stent were selected because these are the most representative of tubular stents. Finite element analyses for the stent system were performed using ABAQUS/Standard code. The present study estimated the flexibility of coronary stents due to loading directions. Moreover the present paper suggests a numerical method to test the flexibility of stents. In conclusion this paper shows how the finite element analysis can be effectively organized in the stent development.

• 대한한의학회지
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• 제16권1호통권29호
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• pp.425-436
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• 1995

In order to evaluate the effect of Polygoni Multiflori Radix on the atherosclerosis induced by high cholesteol diet, rabbits were fed with 4% cholesterol diet, 4% cholesterol-4% Polygoni Multiflori Radix diet during 12 weeks. After 12 weeks, histological changes in coronary artery of rabbits were studied. The results were obtained as follows; 1. At the area % of lumen in coronary arteries, Polygoni Multiflori Radix group showed significant inhibitory effect against decrease of area % in control group. 2. At the atheroma formation in coronary arteries, Polygoni Multiflori Radix group showed decrease effect as compared with control group. 3. At the mucoprotein formation in wall of coronary arteries, Polygoni Multiflori Radix group showed decrease effect as compared with control group. 4. At the lesion of elastic fibers in coronary arteries, Polygoni Multiflori Radix group didn't show effective changes as compared with control group.

• Journal of Chest Surgery
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• 제15권1호
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• pp.112-117
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• 1982

Communications of coronary arteries with the cardiac cavities have first time been described by Krause in 1865 in a case of an accessory artery draining into the pulmonary artery and later Cayla in a case of a right coronary artery entering the right ventricle. The initial cases have been found accidentally at autopsies, however In recent years after the Introduction of angiography and coronary arteriography, the malformation Is diagnosed during life and is corrected surgically. These conditions are unusual entitles since the advent of angiography they are being diagnosed with increasing frequency. Three patients who had surgical correction of coronary-cardiac chamber fistula at our hospital are presented. In the first case and second case, coronary arteriovenous fistula was corrected horizontal mattress suture ligation with pladget under the cardiopulmonary bypass and third case was corrected double ligation with cardiopulmonary bypass standby. The postoperative courses were uneventful. They discharged without any fistula related complica-tions.

• Journal of Chest Surgery
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• 제49권6호
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• pp.461-464
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• 2016

Coronary artery disease has historically been a contraindication to lung transplantation. We report a successful combined bilateral lung transplantation and off-pump coronary artery bypass in a 62-year-old man. The patient had a progressive decline in lung function due to idiopathic pulmonary fibrosis and a history of severe occlusive coronary artery disease.

• Journal of Chest Surgery
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• 제28권4호
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• pp.398-400
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• 1995

Kawasaki s disease is a multisystemic disorder that is an important cause of cardiovascular disease in children. We experienced a case of coronary artery aneurysm secondary to Kawasaki s disease. The patient was 12-year-old female presented as exertional dyspnea & chest pain[NYHA classII . Her coronary angiogram showed saccular aneurysms at proximal right coronary artery and proximal left anterior descending artery. CABG was performed by use of double internal mammary artery.Postoperative E.K.G. showed a normal pattern.She discharged at postoperative 10th day without problem. 4 months after discharge, she had no dyspnea & chest pain in exertion[NYHA class I .

• Journal of Chest Surgery
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• 제52권6호
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• pp.425-427
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• 2019

Coronary artery fistula is an abnormal communication between the coronary artery and the cardiac chambers. In particular, an abnormal connection between the conus branch of the right coronary artery and the proximal left anterior descending coronary artery is defined as Vieussens' arterial ring. Coronary artery fistulas are usually asymptomatic, but some can cause complications such as infective endocarditis. Here, we report a case of Vieussens' arterial ring causing infective endocarditis with severe mitral regurgitation.