Dong Cheul Han

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BACKGROUND AND OBJECTIVES The purposes of this study are 1) to investigate the relationship between resting baseline Pd/Pa, determined by the ratio of the pressures proximal (Pa) and distal (Pd) to the target lesion before, inducing hyperemia and fractional flow reserve (FFR) and 2) to identify a resting baseline Pd/Pa range that might reliably preclude the(More)
BACKGROUND In the general population, the incidence of bundle branch block (BBB) is relatively low, and its effects on long-term prognosis have not been established. Previous studies on the incidence and correlation of BBB to clinical factors have produced conflicting results. However, the incidence of BBB was strongly related to age. This study aimed to(More)
BACKGROUND Various studies have reported that the administration of adenosine (ADO) in cardioplegia reduces myocardial ischemic injury, but this timing may not utilize ADO's potential against myocardial reperfusion injury. This study tested the hypothesis that ADO-supplemented blood cardioplegia (BCP) or ADO administered during reperfusion reduces(More)
A25-year-old male was admitted to the emergency department for severe dyspnea (New York Heart Association Class IV). Physical examination revealed a short stature (139.5 cm), enlarged head, prominent supraorbital ridge, wide nasal bridge, flattened midface, thickened lips, macroglossia, short neck, claw hands, and umbilical hernia. The patient's(More)
Coronary artery embolism is an infrequent cause of acute myocardial infarction. In addition, native aortic valve thrombosis is a very rare condition. We report a case of native valve thrombosis causing acute ST-elevation myocardial infarction in healthy middle-aged man who has no established cardiovascular risk factor. We diagnosed native aortic valve(More)
A 41-year-old man was admitted to the emergency department for sudden-onset right hemiparesis. He had no history of diabetes mellitus, hypertension, arrhythmias, or stroke. However, he had a 20-year history of smoking, dyslipidemias, and hypothyroidism (laboratory test on admission revealed elevated thyrotropin [13.16 ␮IU/mL; reference, 0.27 to 4.2], normal(More)
UNLABELLED It is common to suspect Eisenmenger syndrome when patients with atrial septal defect (ASD) show cyanosis and clubbing. However, ASD accompanying Ebstein's anomaly frequently shows cyanosis without severe pulmonary hypertension, especially in the early period after birth. So the medical decision to decline surgical treatment in those patients(More)
To improve the operation lifetime of organic solar cell, two different diphenylacetylene polymers were tested as UV blocking layer. One of them showed either stronger UV absorption or a relatively intense fluorescence emission in the visible region which is well overlapped with the absorption of P3HT in the OSC. The diphenylacetylene polymer film(More)
It is very difficult to measure the shaft motion of the small rotary compressor because of the small space for the sensor mount, high temperature and pressure of compressor, oil mixed with refrigerant, and electromagnetic noise of the motor. This paper detailed the development of a built-in sensor bearing to measure the shaft motion of a rolling piston type(More)
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