• Journal of Cardiovascular Imaging
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• 제30권3호
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• pp.197-201
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• 2022

• Korean Circulation Journal
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• 제53권12호
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• pp.826-828
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• 2023

• Journal of Cardiovascular Imaging
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• 제26권4호
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• pp.189-200
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• 2018

Pulmonary hypertension (PH) is defined as resting mean pulmonary artery pressure ${\geq}25mmHg$ and is caused by multiple etiologies including heart, lung or other systemic diseases. Evaluation of right ventricular (RV) function in PH is very important to plan treatment and determine prognosis. However, quantification of volume and function of the RV remains difficult due to complicated RV geometry. A number of imaging tools has been utilized to diagnose PH and assess RV function. Each imaging technique including conventional echocardiography, three-dimensional echocardiography, strain echocardiography, computed tomography and cardiac magnetic resonance imaging has-advantages and limitations and can provide unique information. In this article, we provide a comprehensive review of the utility, advantages and shortcomings of the multimodality imaging used to evaluate patients with PH.

• 대한핵의학회지
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• 제39권6호
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• pp.407-412
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• 2005

Echocardiography is one of the most frequently used techniques for diagnosing cardiovascular diseases. Over the last twenty years, technological advances have enabled the application of high-quality imaging. Important recent developments have occurred in echocardiography that are already being used clinically. Equipment and hardware is now available to produce reai time three-dimensional and contrast enhanced imaging.. Tissue Doppler and stress echocardiography have provided potential benefit to analyze hemodynamic information of heart. This review discusses each of these new developments and their potential impact on the practice of echocardioaraphy and cardiology in general.

• 대한임상검사과학회지
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• 제51권2호
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• pp.270-275
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• 2019

노령 인구의 기대 수명이 증가함에 따라 퇴행성 판막 질환이 많아지고 있다. 류마티스성 판막 질환인 승모판 협착증과 대동맥판 역류가 점차적으로 감소하고 석회화된 퇴행성 대동맥판 협착증, 승모판 탈출증 및 허혈성 심장 질환으로 인한 승모판막 폐쇄 부전의 빈도가 증가하고 있다. 심장초음파는 심장판막질환의 진단은 물론, 치료방법 및 수술 시기와 더불어 예후 평가에서도 매우 중요한 도구이며, 판막질환을 평가할 때 모든 판막을 자세하게 관찰하는 이면성 심장초음파가 우선해야 한다. 흔히 접하는 퇴행성 판막질환에 대한 이해와 함께 임상적 특성을 파악하여 심장초음파를 정확하게 시행하는 것이 가장 중요하다. 아울러 대동맥판 협착증의 중증도 평가가 수술적 적응증을 판단하는 데 꼭 필요한 검사인만큼 정확한 판단 기준에 따라 평가하여 환자의 정확한 진단 및 치료가 이루어지도록 해야 한다. 퇴행성 대동맥판 협착증 환자 3례를 통해 심장초음파 검사의 중증도 평가를 쉽게 이해할 수 있기를 바라며 퇴행성 판막 질환의 심초음파 소견을 숙지하는 것이 심장초음파검사를 정확하게 수행하는 것에 수반되어야할 것으로 사료된다.

• Clinical and Experimental Pediatrics
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• 제57권7호
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• pp.297-303
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• 2014

Transcatheter closure of atrial septal defects has become a popular procedure. The availability of a preprocedural imaging study is crucial for a safe and successful closure. Both the anatomy and morphology of the defect should be precisely evaluated before the procedure. Three-dimensional (3D) echocardiography and cardiac computed tomography are helpful for understanding the morphology of a defect, which is important because different defect morphologies could variously impact the results. During the procedure, real-time 3D echocardiography can be used to guide an accurate closure. The safety and efficiency of transcatheter closures of atrial septal defects could be improved through the use of detailed imaging studies.

• Journal of Cardiovascular Imaging
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• 제31권2호
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• pp.98-104
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• 2023

BACKGROUND: We aimed to investigate left ventricular (LV) global longitudinal strain (GLS) in end-stage renal disease patients and its change after kidney transplantation (KT). METHODS: We retrospectively reviewed patients who underwent KT between 2007 and 2018 at two tertiary centers. We analyzed 488 patients (median age, 53 years; 58% male) who had obtained echocardiography both before and within 3 years after KT. Conventional echocardiography and LV GLS assessed by two-dimensional speckle-tracking echocardiography were comprehensively analyzed. Patients were classified into three groups according to the absolute value of pre-KT LV GLS (|LV GLS|). We compared longitudinal changes of cardiac structure and function according to pre-KT |LV GLS|. RESULTS: Correlation between pre-KT LV EF and |LV GLS| were statistically significant, but the constant was not high (r = 0.292, p < 0.001). |LV GLS| was widely distributed at corresponding LV EF, especially when the LV EF was > 50%. Patients with severely impaired pre-KT |LV GLS| had significantly larger LV dimension, LV mass index, left atrial volume index, and E/e' and lower LV EF, compared to mildly and moderately reduced pre-KT |LV GLS|. After KT, the LV EF, LV mass index, and |LV GLS| were significantly improved in three groups. Patients with severely impaired pre-KT |LV GLS| showed the most prominent improvement of LV EF and |LV GLS| after KT, compared to other groups. CONCLUSIONS: Improvements in LV structure and function after KT were observed in patients throughout the full spectrum of pre-KT |LV GLS|.

• Clinical and Experimental Pediatrics
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• 제49권12호
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• pp.1363-1366
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• 2006

신생아에서 흉강내 대동맥류는 드물며, 말판 증후군, 대동맥 축착, 대동맥 판막 협착, 동맥염, 터너 증후군, 결절성 경화증 등과 연관되어 보고된 바 있다. 신생아에서 발견되는 ductus arteriosus aneurysm은 매우 드문 질환이나, 대동맥 파열이 유발 될 수 있는 기형이다. 병인으로 대동맥 쪽에 있는 동맥관의 폐쇄 지연, 선천적으로 동맥관 벽이 약한 경우, 자궁내에서 동맥관으로 혈류 증가, 자궁내에서 동맥관의 협착 등이 있으나 명확하지 않은 상태이다. Ductus arteriosus aneurysm은 흉부 방사선, 심초음파, 3차원 전산화단층촬영, 자기 공명영상 검사 등으로 진단할 수 있다. 치료는 인도메사신의 투여, 수술적 절재 등의 방법이 있으며, 자연 소실되는 경우도 있다. 저자들은 태변흡인증후군 환아에서 우연히 발견된 ductus arteriosus aneurysm이 생후 4주 뒤 자연 소실되는 1례를 경험하였기에 보고하는 바이다.

• Journal of Chest Surgery
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• 제16권4호
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• pp.485-491
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• 1983

From July 1966 to July 1983, sixteen atrial myxomas in fifteen patients were seen at Severance Hospital. Fifteen of the sixteen myxomas were located in the left atrium and one in the right atrium. All the cases except three were correctly diagnosed preoperatively. Presently, M-mode and two-dimensional echocardiography are utilized as safe, reliable, and noninvasive imaging modalities. Echocardiography provided an accurate diagnosis in twelve cases since November 1977. In all cases, myxoma were excised successfully. On patient had reoperation and mitral valve replacement on postoperative first day due to persist mitral regurgitation after excision of left atrial myxoma. One patient had recurrence requiring reoperation 37 months after primary operation. Follow up results of each patient were excellent.

• 대한의용생체공학회:의공학회지
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• 제15권2호
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• pp.217-224
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• 1994

In order to study the shape and dimensions of heart, a procedure to reconstruct a three dimensional left ventricular geometry from two dimensional echocardiographic images was studied including the coordinate transformation, curve fitting and interpolation utilizing three dimensional position registration arm. Nonlinear material property of the left ventricular myocardium was obtained by finite element method performed on the reconstructed geometry and by optimization techniques which compared the computer predicted 3D deformation with the experimentally determined deformation. Elastic modulus ranged from 3.5g/$cm^2$ at early diastole to l53g/$cm^2$ at around end diastole showing slightly nonlinear relationship between the modulus and the pressure. Afterwards using the obtained nonlinear material propertry the stress distribution related with oxyzen consumption rate was analyzed. The maximum and minimum of ${\sigma}_1$ (max. principal stress) occurred at nodes on the second level intersection points of x-axis with endocardium and with epicardium, respectively. And the tendency of the interventricular septum to be flattened was observed from the compressive ${\sigma}_1$ on the anterior, posterior nodes of left ventricle and from the most significant change of dimension in $D_{RL}$ (septal-lateral dimension of right ventricle).