1.Surgical management of the aneurysm of the ascending arota with arotic insufficiency.
Man Sil PARK ; Byung Chul CHANG ; Meyun Shick KANG ; Bum Koo CHO ; Sung Nok HONG
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(6):457-462
No abstract available.
Aneurysm*
2.Ultrasound Guided Biopsy of Malignant Focal Liver Lesions: Comparison of Automated Gun Biopsy with Fine Needle Aspiration Biopsy.
Byung Ihn CHOI ; Joon Koo HAN ; Man Chung HAN ; Jeong Yeon CHO
Journal of the Korean Radiological Society 1995;33(3):389-394
PURPOSE: To compare the efficacy and safety of ultrasound guided automated gun biopsy with fine needle aspiration biopsy of focal liver lesions. MATERIALS AND METHODS: We performed 32 automated gun(19.5G Autovac Biopsy Needle) biopsies and 27 fine needle aspiration(22G Westcott Style Biopsy Needle) biopsies in 48 patients with malignant focal liver lesion under the guidance of ultrasound. We compared the "positive for malignancy rate" and "pathologic diagnosis rate" of both methods with final diagnosis, and the rate of complications. RESULTS: The "positive for maiignancy rate" of automated gun biopsy and needle aspiration are 84.4%(27/32) and 66.7%(18/27) respectively(p=0.11). The "pathologic diagnosis rate" are 84.4%(27/32) and 55.6%(15/27) with significant statistical difference(p<0.05). And there is no difference of the rates of significant complications. CONCLUSION: When compared with the fine needle aspiration biopsy, ultrasound-guided automated gun biopsy is safe and more effective method for malignant focal liver lesion.
Biopsy*
;
Biopsy, Fine-Needle*
;
Diagnosis
;
Humans
;
Liver*
;
Needles
;
Ultrasonography*
3.Intracranial meningeal Masson's hemangioma: CT and angiographic features
Kee Hyun CHANG ; Je G CHI ; Man Chung HAN ; Byung Kyu CHO ; Hyun Jip KIM
Journal of the Korean Radiological Society 1985;21(4):544-551
Masson's hemangioma is a rare benign vascualr condition with a papillary intravascular endothelial proliferation which may appear either as aprimary form or as a secondary form in a pre-existing vascular process.CT and angiographic features of 2 cases with Masson's hemangioma were presented. Both of them were locatedextra-axially in the posterior fossa. CT findings were not specific in both cases: One showed homogeneously enhancing mass, simulating meningioma. And the other demonstrated a multiolocular rim enhancing mass. However, the angiographic features were rather characteristic; Both cases showed persistent vascular poolings of contrast mediawhich were supplied form the meningeal vessels. Angiographic differential diagnosis of similar lesions in theposterior fossa is discussed.
Diagnosis, Differential
;
Hemangioma
;
Meningioma
4.Sonographic features of portal vein thrombosis
Man Gil BAE ; Hyoung Kuk SOHN ; Byung Hee KOH ; On Koo CHO ; Chang Kok HAHM
Journal of the Korean Radiological Society 1986;22(3):368-377
57 cases of portal vein thrombosis detected by ultrasonography were analized. The results were as follows: 1.Most common cause was hepatocellular carcinoma, showing 49 out of 57 cases(86%). 2. Sonographic findings revealedechogenic thrombus in the dilated portal vein. Echogenecity of thrombus was similar to the surrounding liverparenchyma, Thrombus was mainly located in the intrahepatic branch and main portal vein. 3. The location ofthrombus in hepatocellular carcinoma was related to the location of tumor, and frequently extended to the mainportal vein(68.9%). Incidence of thrombosis in hepatocellular carcinoma revealed 49 out of 157 cases, butprospective study showed 42 out of 84 cases(50%). Thrombosis was more common in large sized ill-defined diffuseinfiltrative hepatocellular carcinoma. 4. CT(only 15 cases analyzed) findings revealed low density in the portalvein in all the cases and periportal enhancement in 10 cases on post-enhanced scan. 5. Collateral circulationswere largely detected at the porta hepatis and gallblader fossa. The detection rate was lower on theultrasonography than on the CT or angiography.
Angiography
;
Carcinoma, Hepatocellular
;
Incidence
;
Portal Vein
;
Thrombosis
;
Ultrasonography
;
Venous Thrombosis
5.Differentiation of amebic versus pyogenic liver abscess with US and CT.
Jae Min CHO ; Byung Ihn CHOI ; Joon Koo HAN ; Man Chung HAN ; Chu Wan KIM ; Kyoo Byung CHUNG
Journal of the Korean Radiological Society 1993;29(2):244-248
To differentiate amebic and pyogenic liver abscesses, sonography(US) and CT findings of 21 amebic and 22 pyogenic liver abscesses were reviewed retrospectively. US was performed in all cases and CT in 15 cases of each group. Eleven cases of amebic abscesses had well defined margin which was observed in 10 cases of pyogenic abscessed. Amebic abscesses showed hyperechoic wall in 7 cases and calcification in 4 cases. Ten cases of pyogenic abscesses had mearby intrahepatic duct dilatation which was observed in 2 cases of amebic abscesses. Pneumobilia was seen in 6 cases of pyogenic abscesses. US findings of clear margin and hyperechoic wall, and CT findings of intrahepatic duct dilatation, pneumobilia, and calcification were helpful in differentation of amebic pyogenic liver abscesses.
Abscess
;
Amebiasis
;
Dilatation
;
Liver Abscess, Pyogenic*
;
Retrospective Studies
6.A Case of Renal Hemangiopericytoma.
In Yong CHAE ; Mun Hwan CHO ; Kap Byung KIM ; Hyun Yul RHEW ; Man Ha HUR
Korean Journal of Urology 1989;30(3):426-429
Hemangiopericytoma of the kidney is extremely rare, which is very much resembled a renal cell carcinoma. It tends to grow slowly but occasionally had demonstrated rapid infiltration and distant metastasis. The incidence and degree of its malignancy appears to be low. Herein we report a case of hemangiopericytoma which was developed from left kidney in 42 old man and treated with radical nephrectomy.
Carcinoma, Renal Cell
;
Hemangiopericytoma*
;
Incidence
;
Kidney
;
Neoplasm Metastasis
;
Nephrectomy
7.Magnetic resonance imaging of abdominal disease
Byung Ihn CHOI ; In Wook CHOO ; Kyeong Hee KIM ; Man Chung HAN ; Chu Wan KIM ; Hyun Wook PARK ; Zang Hee CHO
Journal of the Korean Radiological Society 1986;22(6):1015-1026
Magnetic Resonance Imaging(MRI) with 2.0 Tesla superconductive magnet developed by Korea Advanced Institute ofScience was performed in 25 patients with various abdominal diseases and compared with x-ray CT. MRI was obtainedwith spin echo technique using a variety of pulse sequence and various slice orientation including axial, sgittaland coronal section in order to evaluate the diagnostic value, limitation and to determine the optimal pulsesequency in various abdominal diseases. MRI demonstrated the capability of detecting the lesions shown on CT inall cases and also detected one case of diffuse hepatocellular carcinoma which was not seen on CT. MRI showedcapability of differentiation of various liver mass including hepatocellular carcinoma, hemangnioma and simplecyst. MRI showed better anatomical resolution of tumor in retroperitoneum and pelvis, however CT delineatedalimentary tract disease better than MRI did.
Carcinoma, Hepatocellular
;
Humans
;
Korea
;
Liver
;
Magnetic Resonance Imaging
;
Pelvis
8.Impact of Right Ventricular Apical Pacing and Its Frequency on Left Atrial Function.
Byung Joo CHOI ; Kyoung Im CHO ; Seong Man KIM ; Yeo Jeong SONG ; Hyeon Gook LEE ; Tae Ik KIM
Journal of Cardiovascular Ultrasound 2012;20(1):42-48
BACKGROUND: Right ventricular apical (RVA) pacing induces left ventricular (LV) dyssynchrony, increases the risk of persistent atrial fibrillation in the long term. The aim was to investigate the effects of RVA pacing on left atrial (LA) function, which are unknown. METHODS: Echocardiographic evaluation including LV dyssynchrony based on conventional Doppler, tissue Doppler imaging and speckle tracking strain echocardiography was done before and after (12 months) single-chamber ventricular pacemaker implantation in 40 patients with sick sinus syndrome. Patients were divided to 2 groups, according to the RVA pacing frequency (group I had higher pacing rate of more than 50% and group II, less than 50%). RESULTS: There was no significant difference in LV ejection fraction, however, mean global LV strain, myocardial performance index, and parameters of LV dyssynchrony had shown significant changes after 12 months of RVA pacing. There were also significant increase in the LA volume index and the reduction of peak systolic LA strain and strain rate (SR), peak early and late diastolic SR after RVA pacing. Moreover, there was significant deterioration of LV dyssynchrony and both LA and LV longitudinal function in even group II. LA functional deterioration and LA volume was significantly correlated with the frequency of RVA pacing. CONCLUSION: LV dyssynchrony, induced by RVA pacing, significantly impaired active LA contraction and passive stretching, and these findings were shown in the patients with even less than 50% of RVA pacing. Impairment of LA strain/SR was significantly correlated with the frequency of RVA pacing.
Atrial Fibrillation
;
Atrial Function
;
Atrial Function, Left
;
Contracts
;
Echocardiography
;
Humans
;
Muscle Stretching Exercises
;
Sick Sinus Syndrome
;
Sprains and Strains
;
Track and Field
9.Impact of Right Ventricular Apical Pacing and Its Frequency on Left Atrial Function.
Byung Joo CHOI ; Kyoung Im CHO ; Seong Man KIM ; Yeo Jeong SONG ; Hyeon Gook LEE ; Tae Ik KIM
Journal of Cardiovascular Ultrasound 2012;20(1):42-48
BACKGROUND: Right ventricular apical (RVA) pacing induces left ventricular (LV) dyssynchrony, increases the risk of persistent atrial fibrillation in the long term. The aim was to investigate the effects of RVA pacing on left atrial (LA) function, which are unknown. METHODS: Echocardiographic evaluation including LV dyssynchrony based on conventional Doppler, tissue Doppler imaging and speckle tracking strain echocardiography was done before and after (12 months) single-chamber ventricular pacemaker implantation in 40 patients with sick sinus syndrome. Patients were divided to 2 groups, according to the RVA pacing frequency (group I had higher pacing rate of more than 50% and group II, less than 50%). RESULTS: There was no significant difference in LV ejection fraction, however, mean global LV strain, myocardial performance index, and parameters of LV dyssynchrony had shown significant changes after 12 months of RVA pacing. There were also significant increase in the LA volume index and the reduction of peak systolic LA strain and strain rate (SR), peak early and late diastolic SR after RVA pacing. Moreover, there was significant deterioration of LV dyssynchrony and both LA and LV longitudinal function in even group II. LA functional deterioration and LA volume was significantly correlated with the frequency of RVA pacing. CONCLUSION: LV dyssynchrony, induced by RVA pacing, significantly impaired active LA contraction and passive stretching, and these findings were shown in the patients with even less than 50% of RVA pacing. Impairment of LA strain/SR was significantly correlated with the frequency of RVA pacing.
Atrial Fibrillation
;
Atrial Function
;
Atrial Function, Left
;
Contracts
;
Echocardiography
;
Humans
;
Muscle Stretching Exercises
;
Sick Sinus Syndrome
;
Sprains and Strains
;
Track and Field
10.Comparision of Inclusion Technique with Open Technique in Patients with Bentall Procedures.
Joung Taek KIM ; Joon Ho MOON ; Byung Chul CHANG ; Meyun Shick KANG ; Bum Koo CHO ; Man Sil PARK
The Korean Journal of Thoracic and Cardiovascular Surgery 1997;30(5):506-511
To understand the clinical results of aortic root replacement with either inclusion or open technique, we analysed 53 patients who underwent replacement of the aortic root with composite graft between October,1980, and May, 1995. Annuloaortic ectasia was the most common indication for operation(29 patients), follwed by aortic dissection(22 patients). Among 53 patients, 19(35%) had Marfan syndrome. Three patients died during hospitalization (Mortality: 5.5%). The follow up was possible in 48 patients(Follow-up rate; 94%,mean duration;37 months). The actuarial survival rate at 24 months was 95% in open technique group, and 87% in inclusion technique group. Late complications developed in 10 patients. Dissecting aneurysm in the remaining aorta was noted in 3 patients with inclusion technique, and a pseudoaneurysm from coronary artery anastomosis site developed in a patient with inclusion technique. In conclusion, there was no statistical differences in survival for 24 months between inclusion technique and open technique group. But late problems in the remaining aorta or death from unknown cause occurred with moderate frequency ; careful follow-up after aortic root replacement thought to be important for long term survival.
Aneurysm, Dissecting
;
Aneurysm, False
;
Aorta
;
Coronary Vessels
;
Dilatation, Pathologic
;
Follow-Up Studies
;
Hospitalization
;
Humans
;
Marfan Syndrome
;
Survival Rate
;
Transplants