The Effect of Body Fat Disribution on Glucose, Lipid Metabolism and Grewth Hormone Secretion in Obesity / 대한내분비학회지

BACKGROUND: Body fat distribution, rather than the level of obesity per se, appears to be a strong predictor of abnormalities in metabolic complication. Visceral fat accumulation is significantly correlated with glucose intolerance and constitutes as an independent risk factor for the diabetes mellitus. METHODS: We investigated the impact of body fat distribution on the glucose, lipid metabolism and growth hormone secretion in obese subjects with varying glucose tolerance and lean controls matched with sex and age. 69 obese Koreans (34 men, 35 women; 43.8 yrs) and 21 lean Koreans (10 men, 11 women; 40.8 yrs) were recruited. Anthropometric measurement and impedence for measurement of total body fat, and computed tomography for visceral and subcutaneous fat area at umbilicus level were performed. All subjects underwent a standard oral glucose tolerance test and GH stimulation test by L-dopa. RESULTS: The results are summarized as follows. 1. Obese patients had greater ideal body weight (%, IBW) and lean body mass (LBM) than lean controls. But no significant differences were found in IBW and LBM between 3 obese groups. 2. The 25 obese NIDDM had the highest FFA-AUC during OGTI and the lowest GH-AUC to L-Dopa stimulation test. The insulin-AUC during OGTT was the highest in 24 obese subjects with normal glucose tolerance. 3. All male groups have VSR of more than 0.4, which has been designated visceral fat obesity. In contrast all female groups have VSR of lesser than 0.4 but obese DM subjects have the highest VSR. Visceral fat area per body weight ratio(VWR) showed increasing tendency in obese, IGT, and DM group. 4. Waist circumference and VWR showed strong correlation with metabolic parameters among anthropometric parameters. They were positively correlated with FFA-AUC during OGTT and negatively correlated with GH-AUC to L-dopa stimulation. CONCLUSION: Visceral fat accumulation are associated with insulin resistance, dyslipidemia and impairment of growth hormone secretion via increase of free fatty acid. The simple waist circumference may provide a more practical indicator that correlated with aMominal fat distribution and metabolic complications associated with obesity.

Two Cases of Achalasia associated with Microvascular Angina / 대한내과학회지

Achalasia is one of the most common esophageal motility disorder which is characterized by dysphagia and noncardiac chest pain. Esophageal motility disorder has been extensively investigated in recent years as a cause of noncardiac chest pain. The exclusion of cardiac disease is usually based on the presence of normal epicardial coronary arteries. However, myocardial ischemia can occur upon physical stress in patients with normal coronary arteries and is thought to be secondary to dynamic vasoconstriction of coronary artery microcirculation. The disturbances of vasomotor control and the abnormalities of sympathetic nervous system play a role in generation of microvascular angina. Some patients with achalasia exhibit an abnormality in the autonomic nerveous system that extends beyond the gastrointestinal tract. Recently, we experienced two cases of achalasia accompanied by microvascular angina. They had persistent chest pain even after successful endoscopic treatments for achalasia and showed microvascular angina on subsequent coronary angiography and/or exercise stress test.

Nitroglycerine in the Anesthetic Management of Pheochromocytoma - Case report / 대한마취과학회지

We recently had a patient(51 year-old man) who was to undergo resection of pheochromocytoma under general ansthesia. The patient was treated with phenoxybenzamine for 10 days preoperatively. Following induction of anesthesia with intravenous thiopental sodium, endotracheal intubation was performed with vecuronium and anesthesia was maintained with isoflurane. Following intubation, tachycardia controlled by intravenous injection of small dose of propranolol. The course of anesthesia was rather stormy reflected by hypertension, arrhythmia and hypotension. But the patient tolerated long anesthesia and operation relatively well with appropriate use of nitroglycerine, lidocaine, etc. Importance of preoperative preparation, sufficient sedation, smooth induction, complete analgesia, and good muscular relaxation, adequate alveolar ventilation and stable cardiovascular control has been discussed. Blood pressure during manipulation of tumor was 150/100 mmHg without arrhythmia, but gradually was controlled to the range of 120/80 mmHg after intravenous infusion of nitroglycerine at the rate of 0.5-5 pg/kg/min. To our surprise, the blood pressure and pulse and pulse rate was controlled very well with nitroglycerine and isoflurane. After removal of tumor, the blood pressure dropped 100/70 mmHg, so, blood pressure was controlled by LV fluid(Hartmans dextrose, normal saline, plasmanate, low molecular weight dextran), packed red blood cell, whole blood, fresh frozen plasma, vasopressor of small amount was used. There was no marked hypertension, hypotension, tachycardia, arrhythmia during anesthesia. Thus, we anticipate that nitroglyecerine with beta-blocker may be good intraoperative antihypertensive regimen for pheochromocytoma.