The relationship between Helicobacter pylori (H. pylori) infection and gastro-esophageal reflux disease (GERD) is complex. Since some studies have suggested that H. pylori eradication may result in an increased incidence of GERD in duodenal ulcer patients, there have been debates about the protective function of H. pylori infection on GERD. H. pylori-associated antral gastritis can induce increased gastric acid output via increasing gastrin secretion. Changes in gastric acid secretion depend on the distribution (e.g. antral, corpus or pangastritis) or severity of gastritis, not on H. pylori infection itself. Patients with H. pylori infection are at risk of developing gastric mucosal atrophy, and a cohort study suggested that long-term proton pump inhibitor therapy for GERD may accelerate this process. Therefore, it has been recommended that H. pylori should be treated in GERD patients in whom a long-term antisecretory therapy is planned. The previous hypothesis that 'H. pylori infection protects from the development of GERD' is thought to be an erroneous concept recently.
Gastritis/microbiology ; Gastroesophageal Reflux/drug therapy/*microbiology ; Helicobacter Infections/*complications/drug therapy ; *Helicobacter pylori ; Humans

Gastroesophageal reflux disease (GERD) is the most common cause of noncardiac chest pain (NCCP) and is present in up to 60% of patients with NCCP in the West. In Korea, GERD is reported to cause 41% of cases of NCCP, after a reasonable cardiac evaluation. In a recent prospective study in Korea, an empirical trial of a proton pump inhibitor (PPI) was diagnostic for patients with GERD-related NCCP, as elsewhere in the world, and its optimal duration was reported to be at least two weeks in Korea, which is unlike the situation in the West. The report of Choi et al. showed that about 40% of NCCP in non-erosive reflux disease patients had esophageal disorders, including GERD and esophageal motility disorders, and that the standard dose or a low dose of PPI was effective for managing GERD-related NCCP. However, the retrospective nature of the study has limitations, such as an insufficient systemized symptom analysis and the standardization of the dose and interval of the PPI. A large-scale prospective study is needed to assess the accurate diagnosis and effective treatment of NCCP.
Chest Pain ; Esophageal Motility Disorders ; Gastroesophageal Reflux ; Humans ; Korea ; Proton Pump Inhibitors ; Proton Pumps ; Thorax

Irritable bowel syndrome (IBS) is characterized by abdominal discomfort, bloating and disturbed defecation in the absence of any identifiable physical, radiologic or laboratory abnormalities indicative of organic gastrointestinal disease. Diagnosis is based on the identification of symptoms according to Manning, Rome I and Rome II criteria and exclusion of alarm indicators. Approximately, 10-20% of the general population has IBS, and it affects female more often than male for unexplained pathophysiologic reasons. In Korea, it has been reported that the prevalence of IBS is 2.2-6.6% by Rome II criteria and 22.3% by Manning criteria. The health care-seeking population was only 28.6% of community population. Although most patients do not seek medical help, the disease accounts for huge costs for both patients and health-care systems and worsens patients' quality of life significantly.
Humans ; *Irritable Bowel Syndrome/diagnosis/epidemiology ; Korea/epidemiology

The gastric adenoma, which is also called as borderline epithelial lesion, dysplasia, atypical epithelial lesion, is occasionally encoutered during gastroscopy, but the natural history of a gastric adenoma has not been clarified in view of the pre-melignant potential. In Korea, there has been few report for its gastroscopic feature, gastroscopic diagnostic accuracy, or loag-term clinical follow-up yet. (continue...)
Adenoma* ; Follow-Up Studies* ; Gastroscopy ; Korea ; Natural History

No abstract available.
Aged* ; Humans

OBJECTIVES: Although Electronic Medical Record (EMR) systems provide various benefits, there are both advantages and disadvantages regarding its cost-effectiveness. This study analyzed the economic effects of EMR systems using a cost-benefit analysis based on the differential costs of managerial accounting. METHODS: Samsung Medical Center (SMC) is a general hospital in Korea that developed an EMR system for outpatients from 2006 to 2008. This study measured the total costs and benefits during an 8-year period after EMR adoption. The costs include the system costs of building the EMR and the costs incurred in smoothing its adoption. The benefits included cost reductions after its adoption and additional revenues from both remodeling of paper-chart storage areas and medical transcriptionists' contribution. The measured amounts were discounted by SMC's expected interest rate to calculate the net present value (NPV), benefit-cost ratio (BCR), and discounted payback period (DPP). RESULTS: During the analysis period, the cumulative NPV and the BCR were US$3,617 thousand and 1.23, respectively. The DPP was about 6.18 years. CONCLUSIONS: Although the adoption of an EMR resulted in overall growth in administrative costs, it is cost-effective since the cumulative NPV was positive. The positive NPV was attributed to both cost reductions and additional revenues. EMR adoption is not so attractive to management in that the DPP is longer than 5 years at 6.18 and the BCR is near 1 at 1.23. However, an EMR is a worthwhile investment, seeing that this study did not include any qualitative benefits and that the paper-chart system was cost-centric.
Adoption ; Cost-Benefit Analysis ; Electronic Health Records ; Electronics ; Electrons ; Hospitals, General ; Humans ; Investments ; Korea ; Outpatients ; Tertiary Healthcare

Noncardiac chest pain (NCCP) is defined as recurring, angina-like, retrosternal chest pain of noncardiac origin. Although patients with NCCP have excellent long-term prognosis, most suffer persistently from their symptoms. Several pathophysiological mechanisms have been suggested, including gastroesophageal reflux disease (GERD), esophageal motility disorder, esophageal hypersensitivity, and psychological comorbidity. Among them, GERD is the most common cause of NCCP. Therefore, GERD should first be considered as the underlying cause of symptoms in patients with NCCP. Empirical proton pump inhibitor (PPI) treatment with a preferably double dose for more than 2 months could be cost-effective. PPI test can also be used for diagnosis of GERD-related NCCP, but it should be considered for patients with NCCP occurring at least weekly and its duration should be at least 2 weeks. However, upper endoscopy and esophageal pH monitoring are necessary when the diagnosis of GERD is uncertain. Esophageal impedance-pH monitoring could further improve the diagnostic yield. Patients with GERD-related NCCP should preferably be treated with a double dose PPI until symptoms remit (may require more than 2 months of therapy for optimal symptom control), followed by dose tapering to determine the lowest PPI dose that can control symptoms. However, treatment of patients with non-GERD-related NCCP is challenging. An empirical treatment of antidepressants could be considered. If there are specific esophageal motility disorders, smooth muscle relaxants or endoscopic treatment may be considered in selected cases. If none of these traditional treatments is effective, a psychology consultation for cognitive behavioral therapy should be considered.
Chest Pain/*diagnosis/etiology ; Esophageal pH Monitoring ; Gastroesophageal Reflux/complications/*diagnosis/drug therapy ; Humans ; Manometry ; Proton Pump Inhibitors/therapeutic use

Measurement of colon transit time is the most basic and primary tool in evaluating disorders of colonic motility. In particular, it is helpful in pathologic diagnosis and for planning management in patients with constipation. Several techniques for measuring colon transit time currently exist. The standard measurement of colon transit time has been performed using radioopaque marker test. The radioopaque marker test is the most widely used method; it is simple to perform as well as being cost effective. But, this technique produces radiation exposure. Radionuclide scintigraphy and wireless motility capsules are other techniques used to measure colon transit time. In radionuclide scintigraphy, the transit of radioisotope is viewed by gamma camera; this approach has an advantage in that it uses minimal radiation and it allows a physiological assessment of gastrointestinal transit. Wireless motility capsules have been validated most recently, but this technique is not useful in Korea. This review presents the techniques used to measure colon transit time and the interpretations provided in different colon transit studies.
Capsules ; Colon ; Constipation ; Gastrointestinal Transit ; Humans ; Imidazoles ; Korea ; Nitro Compounds

The gastrointestinal motility is regulated by extrinsic and intrinsic neural regulation. Intrinsic neural pathways are controlled by sensory input, inter-neuronal relay and motor output. Enteric motor neurons release many transmitters which affect post-junctional responses. Post-junctional responses can be excitatory and inhibitory depending on neurotransmitters. Excitatory neurotransmitters induce depolarization and contraction. In contrast, inhibitory neurotransmitters hyperpolarize and relaxe the gastrointestinal smooth muscle. Smooth muscle syncytium is composed of smooth muscle cells, interstitial cells of Cajal and platelet-derived growth factor receptor alpha-positive (PDGFRalpha+) cells (SIP syncytium). Specific expression of receptors and ion channels in these cells can be affected by neurotransmitters. In recent years, molecular reporter expression techniques are able to study the properties of ion channels and receptors in isolated specialized cells. In this review, we will discuss the mechanisms of ion channels to interpret the post-junctional responses in the gastrointestinal smooth muscles.
Gastrointestinal Motility ; Giant Cells ; Interstitial Cells of Cajal ; Ion Channels ; Motor Neurons ; Muscle, Smooth ; Myocytes, Smooth Muscle ; Neural Pathways ; Neurotransmitter Agents ; Receptors, Platelet-Derived Growth Factor

BACKGROUND/AIMS: Computed tomography during arterial portography and computed tomography during hepatic arteriography (CTAP and CTHA), one of the most sensitive method in detection of hepatocellular carcinoma (HCC) nodules , is reported to reduce unnecessary operation of HCC. However, it is not clear whet her CT AP and CT HA can reduce early post operative recurrence rate of HCC. We performed this study to find any differences in early postoperative recurrence rate of HCC according to the imaging modalities used for preoperativest aging. METHODS: Ninety-seven patients with HCC who had underg one curative hepat icres ection from Dec.1994 to Mar. 1998 were included (median age = 52 years (26-78), M:F = 85:12). They were classified into 3 groups according to the imaging methods used for preoper ative staging: CTAP & CTHA group (n=56), Lipiodol CT group (n=24), and three phase helical CT group (n=16). No significant inter-group difference was found in preoperative status of the patients or characteristics of HCC. One-year recurrence rates were compared by log-rank test. RESULTS: HCC recurred in 17 of 97 patients (18.7%) within 12 months. A significant difference in 1- year recurrence rate was observed between the groups: helical CT , may be a superior imaging modality for preoperative staging of HCC that can reduce early postoperative recurrence rate.
Aging ; Angiography ; Carcinoma, Hepatocellular* ; Ethiodized Oil* ; Humans ; Portography ; Recurrence* ; Tomography, Spiral Computed*