Korean Guidelines for Diagnosis and Management of Chronic Heart Failure

The prevalence of heart failure (HF) is skyrocketing worldwide, and is closely associated with serious morbidity and mortality. In particular, HF is one of the main causes for the hospitalization and mortality in elderly individuals. Korea also has these epidemiological problems, and HF is responsible for huge socioeconomic burden. However, there has been no clinical guideline for HF management in Korea. 
The present guideline provides the first set of practical guidelines for the management of HF in Korea and was developed using the guideline adaptation process while including as many data from Korean studies as possible. The scope of the present guideline includes the definition, diagnosis, and treatment of chronic HF with reduced/preserved ejection fraction of various etiologies.

Interatrial septal thickness as a marker of structural and functional remodeling of the left atrium in patients with atrial fibrillation

BACKGROUND/AIMS: There have been reports that interatrial septal (IAS) thickness is increased in patients with atrial fibrillation (AF). This study was performed to investigate whether IAS thickness determined by transthoracic echocardiography (TTE) represents the amount of left atrium (LA) structural and functional remodeling. METHODS: The study population consisted of 104 consecutive patients who underwent catheter ablation (CA) for AF (paroxysmal atrial fibrillation [PAF], 82; persistent atrial fibrillation [PeAF], 22). IAS thickness and left atrium volume (LAV) using TTE, and LA voltage (LAVOL) using 3-dimensional electroanatomical mapping system were assessed during sinus rhythm. RESULTS: IAS thickness was significantly correlated with maximal LAV (LAVmax) (r = 0.288, p = 0.003), mean LAVOL (r = -0.537, p or = 2) compared to other groups according to CHA2DS2-VASc score (p = 0.019). During a follow-up of 19.6 months, 23 subjects (22.1%; PAF, 17; PeAF, 6) had recurrence of arrhythmia. Univariate analysis showed that LAVmax, minimal LAV, mean LAVOL, LVEFtotal, LVEFactive, and IAS thickness were associated with recurrence of arrhythmia. However, on multivariate analysis, only mean LAVOL and LAEFactive were independent risk factors for recurrence. CONCLUSIONS: Although IAS thickness showed significant correlations with parameters for LA structural and functional remodeling, this parameter alone could not independently predict recurrence of arrhythmia after CA for AF.

Clinical impact of routine follow-up coronary angiography after second- or third-generation drug-eluting stent insertion in clinically stable patients

BACKGROUND/AIMS: In the bare-metal stent era, routine follow-up coronary angiography (RFU CAG) was used to ensure stent patency. With the advent of drug-eluting stents (DESs) with better safety and efficacy profiles, RFU CAG has been performed less often. There are few data on the clinical impact of RFU CAG after second- or third-generation DES implantation in clinically stable patients with coronary artery disease; the aim of this study was to examine this issue. METHODS: We analyzed clinical outcomes retrospectively of 259 patients who were event-free at 12-month after stent implantation and did not undergo RFU CAG (clinical follow-up group) and 364 patients who were event-free prior to RFU CAG (angiographic follow-up group). Baseline characteristics were compared between the groups. RESULTS: The Kaplan-Meier estimated total survival and major adverse cardiac event (MACE)-free survival did not differ between the groups (p = 0.100 and p = 0.461, respectively). The cumulative MACE rate was also not different between the groups (hazard ratio, 0.85; 95% confidence interval, 0.35 to 2.02). In the angiographic follow-up group, 8.8% revascularization was seen at RFU CAG. CONCLUSIONS: RFU CAG did not affect long-term clinical outcome after second- or third-generation DES implantation in clinically stable patients.

HMOX1 Gene Promoter Polymorphism is Not Associated with Coronary Artery Disease in Koreans

BACKGROUND: The heme oxygenase-1 gene (HMOX1) promoter polymorphisms modulate its transcription in response to oxidative stress. This study screened for HMOX1 polymorphisms and investigated the association between HMOX1 polymorphisms and coronary artery disease (CAD) in the Korean population. METHODS: The study population consisted of patients with CAD with obstructive lesions (n=110), CAD with minimal or no lesions (n=40), and controls (n=107). Thirty-nine patients with CAD with obstructive lesions underwent follow-up coronary angiography after six months for the presence of restenosis. The 5'-flanking region containing (GT)n repeats of the HMOX1 gene was analyzed by PCR. RESULTS: The numbers of (GT)n repeats in the HMOX1 promoter showed a bimodal distribution. The alleles were divided into two subclasses, S25 and L25, depending on whether there were less than or equal to and more than 25 (GT)n repeats, respectively. The allele and genotype frequencies among groups were statistically not different. More subjects in the S25-carrier group had the low risk levels of high sensitivity C-reactive protein (hsCRP) for the CAD than those in the non-S25 carrier group (P=0.034). Multivariate logistic regression analysis revealed that the genotypes of (GT)n repeats were not related to CAD status. The restenosis group in the coronary angiography follow-up did not show any significant difference in HMOX1 genotype frequency. CONCLUSIONS: The HMOX1 genotypes were not found to be associated with CAD, but the short allele carrier group contained more individuals with hsCRP values reflecting low risk of cardiovascular disease in the Korean population.

Successful Retrieval of a Fractured and Entrapped 0.035-Inch Terumo Wire in the Femoral Artery Using Biopsy Forceps

A 0.035-inch guide wire fracture and entrapment in a peripheral artery is a very rare complication, but when it does occur it may lead to life-threatening complications, such as perforation, thrombus formation, embolization, and subsequent limb ischemia. We describe our experience of successfully retrieving a fractured 0.035-inch Terumo guide wire in the external iliac artery using a biopsy forcep.

Impact of Heterogeneous Overlapping Drug-Eluting Stents on the Arterial Responses of Rabbit Iliac Arteries: A Comparison With Overlapping Bare Metal Stents

BACKGROUND AND OBJECTIVES: Although the use of heterogeneous overlapping drug-eluting stents (DES) is not uncommon in clinical practice, whether the implantation sequences of heterogeneous DES will influence the endothelialization or arterial responses differently remains unclear. MATERIALS AND METHODS: Twenty-one rabbits were randomized to receive overlapping stents in the iliac artery for 3 months {distal sirolimus-eluting stent (SES, Cypher(TM))+proximal paclitaxel-eluting stent (PES, Taxus(TM)) (C+T, n=7), distal Taxus+proximal Cypher (T+C, n=7) and bare metal stent (BMS)+BMS (B+B, n=7)}. Endothelial function was evaluated by the acetylcholine provocation test during follow-up angiography. Histopathological changes in proximal, overlapped, and distal stented segments were evaluated. RESULTS: Although the overall angiographic outcomes were comparable, late loss (mm) in the distal stented segment was higher in the B+B (0.39+/-0.07) and C+T (0.40+/-0.20) than that in the T+C (0.06+/-0.02) group (p<0.001). The incidence of acetylcholine-induced spasm was higher in the DES groups compared with BMS, regardless of the implantation sequences (85.7% in C+T vs. 14.3% in B+B vs. 71.4% in T+C, p=0.017). Notably, only the distal Cypher implantation group (C+T) had three cases of stent fracture. A histopathological analysis showed that despite similar arterial injury scores, Taxus and Cypher stents had higher inflammatory reactions at the overlapped and distal segments compared with those of BMS. CONCLUSION: Despite similar arterial injury, higher inflammatory reactions were observed in overlapping DES segments regardless of the implantation sequence compared with that of BMS. Moreover, DES was associated with impaired endothelial function on the adjacent non-stented segments.

Comparison of Effectiveness in Two Different Oral Erythromycin Dose Regimen for Treatment of Feeding Intolerance in Preterm Infants / 대한주산의학회잡지

PURPOSE: The objective of this study was to compare the effectiveness and safety of intermediate dose oral erythromycin treatment for feeding intolerance in preterm infants with high dose oral erythromycin regimen. METHODS: A prospective, randomized study in a tertiary referral center of a university hospital was conducted on 40 preterm infants less than 1,500 g, diagnosed as feeding intolerance. The infants were randomly allocated to receive high dose oral erythromycin (12.5 mg/kg, every six hours for 14 days) or intermediate dose erythromycin (10 mg/kg, every 6 hours for the first 2 days, followed by 4 mg/kg, every 6 hours for another 5 days). The times taken to establish full enteral feeding and the numbers of withheld feeds after the drug treatment were compared between the two groups. Potential adverse effects of oral erythromycin and complications associated with parenteral nutrition were assessed as secondary outcomes. RESULTS: Baseline characteristics were similar between the two groups. There was no significant difference in times to full feeding (40.4 days in high dose group and 38.6 days in intermediate dose group) and numbers of withheld feeding (3.1 in high dose group and 2.8 in intermediate dose group). No significant differences in episodes of sepsis, necrotizing enterocolitis, cholestasis and death were observed between two groups. No episode of arrhythmia and hypertrophic pyloric stenosis were observed in both group. Noninferiority was demonstrated of intermediated dose regimen for efficacy and adverse effect of erythromycin, compared with high dose regimen. CONCLUSION: Intermediate dose oral erythromycin treatment does improve feeding intolerance in preterm infants as effectively and safely as high dose erythromycin treatment regimen.

The Clinical Effects of Early Trophic Feeding in Extremely Low Birth Weight Infants / 대한주산의학회잡지

PURPOSE: This study investigated the effects of early enteral feeding on the morbidities of extremely low birth weight infants (ELBWI) weighing less than 1,000 g. METHODS: We conducted a retrospective review of the medical records of sixty one ELBWI who were admitted to the neonatal intensive care unit of Inje University Busan Paik Hospital from January 2007 to October 2009. ELBWI were divided into two groups; the control group included ELBWI from January 2007 to March 2008, for whom enteral feeding was started beyond 3 days and the early feeding group included ELBWI from April 2008 to October 2009, for whom enteral feeding was started within 3 days. RESULTS: Gestational age and birth weight did not differ between the two groups. In the early feeding group, start day of enteral feeding (control group vs. early feeding group; 7+/-2days vs. 2+/-1days), time to achieve full enteral feeding (68+/-6 days vs. 22+/-2 days), and the duration of parenteral nutrition (58+/-6 days vs. 22+/-2 days) were significantly shorter, and weight gain at postnatal day 28 was significantly higher than that of the control group (P<0.001). No differences were observed in the incidence of sepsis and necrotizing enterocolitis and duration of hospitalization; however, the incidence of total parenteral nutrition induced cholestasis (44% vs. 7%) and bronchopulmonary dysplsia (78% vs. 24%) was significantly lower in the early feeding group. CONCLUSION: Early enteral feeding in ELBWI shortened the time to achieve full enteral feeding, improved weight gain, and decreased the incidence of brochopulmonay dysplasia and cholestasis.

Slow Coronary Flow is Related to Increased Carotid Intima-Media Thickness but Not Pulse Wave Velocity

BACKGROUND AND OBJECTIVES: Slow coronary flow (SCF) is characterized by delayed contrast dye opacification without significant stenosis of epicardial coronary arteries. However, the pathophysiology and clinical implications of SCF are not fully understood. Some reports have suggested that SCF might be caused by atherosclerosis in the coronary artery microvasculature. Measuring carotid intima-media thickness (IMT) and pulse wave velocity (PWV), which are non-invasive and simple diagnostic tools, was developed to detect subclinical atherosclerosis. Thus, we determined IMT and PWV, and their possible relationship in a SCF group and a normal coronary flow (NCF) group of patients. SUBJECTS AND METHODS: We included 101 patients who complained of chest pain but had a normal coronary angiogram. Thrombolysis in Myocardial Infarction frame count (TIMI frame count, TFC) was evaluated in the left and right coronary arteries. We defined SCF as a TFC of more than 25. Carotid IMT was measured by ultrasonography in both common carotid arteries. PWV was calculated from pulse transit time between the brachial and ankle arteries. RESULTS: Fifteen patients were included in the SCF group and 86 patients in the NCF group. Male patients (n=11, 73.3%) were significantly more common in the SCF group than in the NCF group (n=37, 43.0%, p<0.05). The TFC of the SCF and NCF groups were 28.8+/-3.5 and 15.7+/-4.5, respectively. The carotid IMT in the SCF group increased significantly compared to that in the NCF group (1.2+/-0.3 mm vs. 0.8+/-0.1 mm, p<0.01). However, no significant difference in PWV was observed between the two groups. CONCLUSION: SCF may reflect early atherosclerotic changes in the coronary artery microvasculature.

Renal Dysfunction in Acute Heart Failure

During treatment of acute heart failure (AHF), worsening renal function is often complicated and results in a complex clinical course. Furthermore, renal dysfunction is a strong independent predictor of long-term adverse outcomes in patients with AHF. Traditionally, the predominant cause of renal dysfunction has been attributed to impairment of cardiac output and relative underfilling of arterial perfusion. Recently, emerging data have led to the importance of venous congestion and elevated intra-abdominal pressure rather than confining it to impaired forward cardiac output as the primary driver of renal impairment. Relief of congestion is a major objective of AHF treatment but therapy is still based on the administration of loop diuretics. The results of the recently performed controlled studies for the assessment of new treatments to overcome resistance to diuretic treatment to protect kidneys from untoward effects have been mostly neutral. Better treatment of congestion in heart failure remains a major problem.

Telmisartan Versus Valsartan in Patients With Hypertension: Effects on Cardiovascular, Metabolic, and Inflammatory Parameters

BACKGROUND AND OBJECTIVES: Angiotensin-receptor blockers (ARBs) have beneficial effects on cardiovascular, metabolic, and inflammatory parameters in addition to controlling blood pressure (BP). However, few comparative clinical studies have been conducted with different ARBs. We compared these effects in patients with uncomplicated hypertension who were receiving telmisartan or valsartan. SUBJECTS AND METHODS: The subjects were patients with essential hypertension (48.4+/-9.6 years) who were randomly assigned to take either telmisartan (80 mg/day, n=30) or valsartan (160 mg/day, n=30) for 12 weeks. Their anthropometric, laboratory, vascular, and echocardiographic data were measured at baseline and at the end of the study. RESULTS: Baseline characteristics were not significantly different between the two groups, except for the carotid-femoral pulse wave velocity (cfPWV; telmisartan group vs. valsartan group; 841.2+/-131.0 vs. 761.1+/-104.4 cm/s, p<0.05). After 12 weeks, BP had fallen to a similar extent with mean reductions in the systolic and diastolic BP of 20.7+/-18.1 and 16.3+/-13.0 mm Hg (p<0.001, respectively) for the telmisartan and 22.5+/-17.0 and 16.8+/-9.3 mm Hg (p<0.001, respectively) for the valsartan group. Although the cfPWV and left ventricular mass index (LVMI) fell significantly only with the administration of telmisartan, they were not significantly different when baseline cfPWV was considered. The differences in the cfPWV and LVMI changes from baseline between the two groups were also not significant after adjusting for baseline cfPWV. No significant changes in other vascular, metabolic, or inflammatory parameters were observed with either treatment. CONCLUSION: The effects of a 12-week treatment with the two ARBs, telmisartan and valsartan, on cardiovascular, metabolic, and inflammatory parameters were not different in patients with uncomplicated hypertension.

A Familial Case of Kallmann Syndrome due to KAL1 Gene Complete Deletion / 대한소아내분비학회지

Kallmann syndrome (KS) is characterized by the association of hypogonadotropic hypogonadism and anosmia. Although the vast majority of KS cases are sporadic, some X-linked recessive (KAL1), autosomal dominant (FGFR1), and autosomal recessive (most commonly GNRHR) modes of inheritance have been described. Two boys were referred to our department because of cryptorchidism and the absence of puberty. Upon laboratory evaluation they were diagnosed with hypogonadotropic hypogonadism. Agenesis of the olfactory bulbs was detected in radiologic tests, and total deletion of the KAL1 gene was detected through multiplex ligation-dependent probe amplification (MLPA). Although cryptorchidism was diagnosed in the siblings, only the older brother suffered from sensorineural hearing loss and right renal agenesis, a feature that had been reported in X-linked KS. We describe herein the clinical heterogeneity of two affected brothers who carry a complete deletion in KAL1; this is the first case of familial Kallmann syndrome due to the complete deletion of the KAL1 gene reported in Korea.

A Familial Case of Kallmann Syndrome due to KAL1 Gene Complete Deletion / 대한소아내분비학회지

Kallmann syndrome (KS) is characterized by the association of hypogonadotropic hypogonadism and anosmia. Although the vast majority of KS cases are sporadic, some X-linked recessive (KAL1), autosomal dominant (FGFR1), and autosomal recessive (most commonly GNRHR) modes of inheritance have been described. Two boys were referred to our department because of cryptorchidism and the absence of puberty. Upon laboratory evaluation they were diagnosed with hypogonadotropic hypogonadism. Agenesis of the olfactory bulbs was detected in radiologic tests, and total deletion of the KAL1 gene was detected through multiplex ligation-dependent probe amplification (MLPA). Although cryptorchidism was diagnosed in the siblings, only the older brother suffered from sensorineural hearing loss and right renal agenesis, a feature that had been reported in X-linked KS. We describe herein the clinical heterogeneity of two affected brothers who carry a complete deletion in KAL1; this is the first case of familial Kallmann syndrome due to the complete deletion of the KAL1 gene reported in Korea.

Carotid Intima-Media Thickness and Plaque as a Predictor for Ischemic Etiology in Patients With Severe Left Ventricular Systolic Dysfunction

BACKGROUND AND OBJECTIVES: Coronary artery disease (CAD) is a major cause of heart failure associated with left ventricular systolic dysfunction (LVSD). The prognosis of LVSD is significantly influenced by the etiology of heart failure and therefore, differentiation of significant CAD from other etiologies is important. Carotid intima-media thickness (IMT) and plaque are useful predictors for cardiovascular events, including stroke and CAD. The purpose of this study was to evaluate the predictive value of carotid IMT and plaque for the diagnosis of CAD in LVSD patients. SUBJECTS AND METHODS: Seventy-three (n= 73, 47 male, 67.6+/-12.4 years) patients hospitalized for heart failure with severe LVSD were retrospectively enrolled. The severity of CAD was analyzed by the Duke Jeopardy Score system, and carotid IMT and plaque were measured according to the Mannheim Carotid IMT Consensus. RESULTS: Significant CAD was found in 41 patients (56.1%, CAD group) on coronary angiography. Mean common carotid artery (CCA) IMT (0.74+/-0.05 mm vs. 1.04+/-0.04 mm, p<0.01) was significantly higher in the CAD group. Plaque in CCA (6.25% vs. 19.5%, p<0.01) and plaque in bulb (25.0% vs. 60.9%, p<0.001) were significantly higher in the CAD group. Mean CCA IMT {odds ratio (OR) 2.61, 95% confidence interval (CI) 1.134-4.469, p<0.01} and plaque in bulb (OR 4.69, 95% CI 1.702-12.965, p<0.01) were significant predictors for the diagnosis of CAD according to multivariate logistic regression analysis. CONCLUSION: In patients with severe LVSD, mean CCA IMT and bulb plaque can be useful additional predictors for the diagnosis of CAD.

The First Korean Case of Cutaneous Lung Tissue Heterotopia

Cutaneous lung tissue heterotopia is a very rare disorder where mature lung tissues develop in the skin. This is only the second known report of cutaneous lung tissue heterotopia, with the first by Singer et al. in 1998. A newborn infant had a hemangioma-like, freely movable mass connected to the anterior aspect of the sternal manubrium. Pathologic findings showed mature lung tissues with bronchi, bronchioles, and alveoli through the dermis and subcutis, and it was diagnosed as cutaneous lung tissue heterotopia. Cutaneous lung tissue heterotopia is hypervascular, so grossly it looks like a hemangioma. It can be differentiated from pulmonary sequestration, teratoma, bronchogenic cyst, and branchial cleft cyst by histology and the location of the mass. We describe the clinical, radiologic, and pathologic findings of a cutaneous lung tissue heterotopia, the first reported in Korea.

Clinical Utility and Accuracy of Coaguchek(R) XS, a Reliable Alternative to Laboratory International Normalized Ratio Monitoring in Korean Patients With Atrial Fibrillation

BACKGROUND AND OBJECTIVES: To evaluate the accuracy and the clinical utility of the Coaguchek(R) XS, a portable point-of-care coagulometer, compared to standard laboratory methods in Korean patients. SUBJECTS AND METHODS: We included 107 patients with atrial fibrillation on long-term oral warfarin therapy. The prothrombin time as expressed by the international normalized ratio (INR) was measured by the portable Coaguchek(R) XS system as well as standard laboratory methods. Agreement between the two methods was defined as a difference of less than 0.3 between the INR values. RESULTS: The INR determined by the portable Coaguchek(R) XS had excellent correlation with the values obtained by standard methods (r=0.984, p3.0). There was a 91.6% agreement between the two methods. Only nine cases (8.4%) had a difference of more than 0.3; this was mainly noted in the high INR group. CONCLUSION: The portable self-testing of the INR by the Coaguchek(R) XS might be a reliable alternative to hospital based laboratory testing in Korean patients.

Changes in Left Ventricular Systolic Function According to Thrombolysis in Myocardial Infarction Frame Count Immediately After Coronary Intervention in Patients With Obstructive Coronary Artery Disease

BACKGROUND AND OBJECTIVES: Some reports have suggested that coronary microvascular dysfunction plays a role in the recovery of myocardial function in patients with obstructive coronary artery disease. Thrombolysis in myocardial infarction (TIMI) frame count (TFC) is regarded as a simple, reliable method for evaluating microvascular function. We evaluated microvascular function using TFC immediately after coronary intervention and compared TFC with left ventricular systolic function eight months later. SUBJECTS AND METHODS: We studied 68 patients with obstructive coronary artery disease who underwent coronary intervention. Just after intervention, TFC was calculated with the standard method. Left ventricular systolic function was assessed with left ventricular diastolic dimension (LVEDd), ejection fraction (EF), and wall motion score index (WMSI). Eight months after intervention, we completed follow-up coronary angiography and echocardiography. We defined high TFC (HTFC) as a TFC greater than 18. RESULTS: Ten patients were in the HTFC group, and 58 patients were in the low TFC (LTFC) group. There was no difference between the two groups with regard to baseline cardiovascular characteristics and angiographic findings. Just after intervention, the HTFC group showed significantly higher LVEDd (56.6+/-8.9 mm) and WMSI (1.60+/-0.65) compared to the LTFC group (50.3+/-5.9 mm, p0.05). Eight months after intervention, there was also a significant decrease in the WMSI in the LTFC group (1.23+/-0.25, p0.05). CONCLUSION: Increased TFC immediately after coronary intervention is an important poor prognostic factor related to myocardial systolic function eight months after coronary intervention. Coronary microvascular dysfunction may influence myocardial recovery in the setting of obstructive coronary artery disease.

Usefulness of Korean Guideline for Grading Disability in Patient with Congestive Heart Failure

BACKGROUND AND OBJECTIVES: The increased prevalence of congestive heart failure (CHF) and disabled population with heart diseases has led, in 2000, to the establishment of Korean guidelines for grading disability in patients with CHF, but its usefulness has not been tested. The purpose of this study is to investigate the usefulness of the guidelines in grading disability and predicting the prognosis of patients with CHF. SUBJECTS AND METHODS: Between January, 1999 and March, 2003, 546 consecutive CHF patients were enrolled. Of these 546 patients, only 240 completed one year of follow up before the severity of disability was graded. They were classified into either the disabled or non-disabled groups according to the Korean guidelines for grading disability. They were also subdivided into severe CHF or non severe groups. Severe CHF was defined as a status greater than New York Heart Association class III or to those requiring frequent hospitalization, i.e. more than twice. The mortality and frequency of severe CHF between the disabled and non-disabled groups were evaluated. RESULTS: The prevalence of the disabled with CHF was 7.1% (17/240); one patient was graded in the severe disabled (grade 1), 4 in the moderate (grade 2) and 12 in the mild disabled (grade 3) groups. The mortality within the disabled group was higher than that in the non disabled group (8/17 vs. 1/223, 47.6% vs. 0.4%, p<0.001), but there was no difference according to the severity of disability (p=0.26). All survivors (9 patients) in the disabled group were classified with severe CHF, but 15 from 222 (6.8%) patients not classified in the disabled group also showed severe CHF stati. Half (8 patients, 50%) of the 16 whose total disability scores ranged between 15 and 19, 7 (21.2%) of the 33 with total scores between 10 and 14 were classified with severe CHF stati. CONCLUSION: The current Korean guidelines for grading of disability were able to relatively well predict the prognosis of CHF between the disabled and non disabled groups, but appeared too strict, in that some severe patients cannot be classified into the disabled group. Therefore, the current guidelines will either require modification following a large scaled study or the disability grades will have to be classified into more than 4 categories.

Multicenter Analysis of Clinical Characteristics and Prognostic Factors of Patients with Congestive Heart Failure in Korea

BACKGROUND AND OBJECTIVES: Congestive heart failure is one of the most frequent problems in cardiovascular patients. The objectives of this study were to evaluate the demographic and clinical characteristics and prognostic factors of patients hospitalized with congestive heart failure in Korea. SUBJECTS AND METHODS: Nine university hospitals were involved, and gathered prospective clinical data on patients with heart failure. One thousand eight hundred and sixty four patients, admitted between Jan.1 1998 and Aug. 31 2003, were enrolled, and data from 1,759 patients were analyzed. RESULTS: The cumulative survival rates at 6 month, and 1 and 2 years were 90.8, 80.1 and 76.4%, respectively. Ischemic heart disease was the most frequent underlying disease (32.3%). Diabetes mellitus (OR: 1.682, 95%CI: 1.234-2.389, p=0.005), a previous history of myocardial infarction (OR: 2.521, 95%CI: 1.742-4.258, p<0.0001) and cerebrovascular accidents (OR: 2.020, 95%CI: 1.166-3.101, p=0.001) were the worst prognostic factors. CONCLUSION: Ischemic heart disease was the major cause of heart failure. The two year survival rate of patients with congestive heart failure was 76.4%. The factors relating to a poor prognosis were diabetes, a previous history of myocardial infarction and cerebrovascular accidents.

Risk Factors of Deep Vein Thrombosis and Pulmonary Embolism in Korean

BACKGROUND AND OBJECTIVES: Deep vein thrombosis and pulmonary embolism are both associated with a high mortality. However, in Korea, they are known as relatively rare diseases and are not sufficiently evaluated, so there is limitations in the proper approach toward their diagnosis and management. SUBJECTS AND METHODS: The risk factors, accompanying illness and family history of patients with deep vein thrombosis and pulmonary embolism, treated at Hallym University Sacred Heart Hospital, between January 1999 and July 2002, were analyzed. RESULTS: There were 113 patients with deep vein thrombosis and pulmonary embolism, comprised of 45 men and 68 women, 31 being older than 70 years of age (the largest portion). Of the 113 patients, 101 had identified causal illness causative diseases, but the other was no obvious risk factors. Overweight and obese turned out to be the most frequent risk factor. While there were 35% with one risk factor, 51.3, 10 and 3.7% had two, three or four risk factors, respectably. The recurrence rate was 20.3%, and that of women was 1.2 fold that of men, irrespectively of the risk factor. There were also two patients with a positive family history. CONCLUSION: The freguent risk factors and underlying diseases for deep vein thrombosis and pulmonary embolism were over-weight/obesity, antiphospholipid syndrome, cancer and a bed ridden state, in that order of frequency. As the individual risk factors of the patients overlapped in 61.5% cases, attention should be paid to overlapping risk factors. In order to reduce the complications of these diseases, each patient's risk factors should be carefully evaluated, and some patients should be advised to take life-long care.