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이형한,김용평 慶熙大學校 레이저 工學硏究所 2003 레이저공학 Vol.14 No.-
A micro hollow cathode discharge in mixtures of xenon and iodine to provide intense narrow band ultraviolet (UV) radiation at 253 nm ( Xel*) is investigated. The characteristics of the emission spectra of the excimer and UV intensity formed from mixtures of xenon and iodine for different total gas pressures are reported. Highest intensities at a wavelength of 253 nm were obtained at the mixture of xenon 7 %, iodine 38 %, Helium 89.2 % (400 Torr). Ideal spectrum were obtained at the mixture of xenon 7 %, iodine 4 %, Helium 89 % (400 Torr).
Hypertrophic Cardiomyopathy Progression to Ischemic Cardiomyopathy-like Clinical Feature
이형한,김지희,김철민,장보현 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1
The patient was a 32-year-old man when he was first hospitalized as a result of electrocardiographic abnormality (ST depression in II, III and aVF). He was diagnosed concentric nonobstructive HCMP [ejection fraction (EF) 72%, septal thickness of left ventricular (LV) 19.7 mm, LV end diastolic/ systolic volume (42.7/13.4 mL)]. His mother was diagnosed apical hypertrophy but there were no history of sudden death in the family members. The patient was re-hospitalized 7 years later as a result of syncope. Neurologic examination was normal findings. Echocardiographic findings were nonobstructive HCMP but decreased LV wall thickness (16 mm) and low-normal EF values (EF=63.9%). The patient was re-hospitalized 9 years later as a result of atypical chest discomfort. Echocardiography revealed akinesis at basal to mid anteroseptal,basal to mid septal, basal to mid inferior and basal to mid anterior LV wall motion with decreased LV systolic function (EF=45.5%) but normal chamber size (LV dimension diastole/systole 54.8/42.3mm). Coronary angiography was performed but showed normal coronary artery. Cardiac magnetic resonance imaging (MRI) revealed multifocal transmural and subepicardial delayed enhancing areas at anteroseptal,septal and inferoseptal wall of LV and wall thinning and decreased wall motion of anteroseptal LV wall (Figure). Findings of ischemic CMP-like feature by echocardiography suggested microvascular dysfunction.And then this case was confirmed the end stage of HCMP with microvascular dysfunction by using cardiac MRI after a follow-up period of more than 16 years.