• Journal of Chest Surgery
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• v.48 no.6
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• pp.432-434
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• 2015

Anticoagulation therapy is essential after cardiac valve surgery. However, spontaneous bleeding remains a major concern during anticoagulation therapy. Spontaneous gallbladder (GB) hemorrhage (hemobilia) is a rare occurrence during standard anticoagulation therapy. This report presents a case of GB hemorrhage that occurred shortly after initiating oral anticoagulant therapy in a patient who had undergone mitral valve replacement surgery.

• Journal of Korean Neurosurgical Society
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• v.58 no.3
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• pp.262-270
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• 2015

Objective : Long-term oral anticoagulation or antiplatelet therapy has been used with increasing frequency in the elderly. These patients are at increased risk of morbidity and mortality from expansion of intracranial hemorrhage. We conducted a single-center retrospective case control study to evaluate risk factors associated with outcomes and to identify the differences in outcome in traumatic brain injury between preinjury anticoagulation use and without anticoagulation. Methods : A retrospective study of patients who underwent craniotomy or craniectomy for acute traumatic cerebral hemorrhage, between January 2005 and December 2014 was performed. Results : A consecutive series of 50 patients were evaluated. The factors significantly differed between the two groups were initial Prothrombin Time-International Normalized Ratio, initial platelet count, initial Glasgow Coma Scale score, and postoperative intracranial bleeding. Mean Glasgow Outcome Scale (GOS) score were similar between the two groups. In the patient with low-energy trauma only, no significant differences in GOS score, postoperative bleeding and many other factors were observed. The contributing factors to postoperative bleeding was preinjury anticoagulation and its adjusted odds ratio was 12 [adjusted odds ratio (OR), 12.242; p=0.0070]. The contributing factors to low GOS scores, which mean unfavorable neurological outcomes, were age (adjusted OR, 1.073; p=0.039) and Rotterdam scale score for CT scans (adjusted OR, 3.123; p=0.0020). Conclusion : Preinjury anticoagulation therapy contributed significantly to the occurrence of postoperative bleeding. However, preinjury anticoagulation therapy in the patients with low-energy trauma did not contribute to the poor clinical outcomes or total hospital stay. Careful attention should be given to older patients and severity of hemorrhage on initial brain CT.

• Journal of Korean Biological Nursing Science
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• v.14 no.1
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• pp.66-75
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• 2012

Purpose: This study was conducted to measure medication adherence and perceptions of anticoagulation therapy and its relationship to patients taking warfarin. Methods: in a cross-sectional survey, 150 patients taking warfarin who had visited an outpatient clinic of a cardiovascular center in Seoul were included as research subjects. Medication adherence was measured using a visual analogue rating scale (VAS). Barriers and attitudes toward adherence, and oral anticoagulation knowledge, were measured using a structured questionnaire. Participants' medical records also were reviewed to identify clinical characteristics. Results: About one third of the participants (30.7%) reported medication adherence as 100%. The major barriers to adherence were identified as "Forgetting the time of medication" and "Not carrying their medication". Overall attitudes toward medication adherence were high, but oral anticoagulation therapy knowledge was low. To determine the relationship of medication adherence and perceptions of anticoagulation therapy, participants were stratified into three groups, based on their medication adherence levels (high adherence, moderate adherence, low adherence). Participants in the high adherent group more likely to be older (OR: 1.04, 95% CI: 1.005-1.071) and to have positive attitudes toward medication adherence (OR: 1.12, 95% CI:1.013-1.229) compared to the other two groups. Conclusion: The results show that age and attitude exerts significant influence on medication adherence in patients taking warfarin.

• Journal of Chest Surgery
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• v.9 no.2
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• pp.215-219
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• 1976

Anticoagulation therapy with Warfarin and Dipyridamole is useful after prosthetic heart valve replacement for the prevention of thromboembolic accidents. Here presented a case of right ovarian hematoma, 41 years old, female who has been already treated double valve replacement due to mitral insufficiency with 27 mm $Bj{\ddot{o}}rk-Shiley$ mitral, and 29 mm Hancock tricuspid valve successfully on 27th, April, 1976. Just after the operation, patient was treated the anticoagulation therapy with Dipyridamole 300 mg, and Heparin, and later switched to Warfarin 3.75 mg or 5 mg po, as the maintenance dose. Three and half months after the anticoagulation therapy, patient complained the lower abdominal pain and vaginal spotting and which revealed right ovarian hematoma due to ovulation, manifested due to anticoagulation therapy. Patient was discharged postoperative 15 th day with the maintenance dose 5 mg Warfarin and Dipyridamole 300mg po to maintain the prothrombin time 30%, after the uterus and both. ovaries and both adnexae are resected out for the prevention of the further hemorrhage of ovary.

• Journal of The Korean Dental Society of Anesthesiology
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• v.12 no.2
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• pp.99-104
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• 2012

Anticoagulation therapy with warfarin sodium is used to reduce the risk of thromboembolic events in patients with valvular heart disease, prosthetic heart valve, recurrent myocardiac infarction, etc. To keep anticoagulation state and minimize bleeding risk, patients with high risk of thromboembolism have been usually hospitalized for heparinization before oral surgery like extraction. However, this protocol requires time and high expense because of the long period of hospitalization and this is why low-molecular-weight heparin (LMWH) therapy is receiving attention in medical field as well as dentistry. LMWH has several advantages over unfractionated heparin (UFH) including predictable anticoagulant response which makes coagulation monitoring unnecessary in most patients and longer half-life than heparin which enables the patients to give themselves a subcutaneous injection once or twice daily. These advantages of LMWH make patients get oral surgery on an outpatient basis so that they can save time and cost. This case report introduces the use of LMWH in dental surgery and suggests proper use of LMWH. Though LMWH bridging therapy is widely used most of the previous studies are observational studies. Therefore randomized controlled trials are necessary to evaluate the safety and efficacy of LMWH bridging therapy.

• Journal of Chest Surgery
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• v.29 no.3
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• pp.326-330
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• 1996

Despite anticoagulation, systemic embolization and anticoagulant-related hemorrhage are the major drawbacks of heart valve replacement with mechanical prostheses. Among many predisposing factors, inadequacy of anticoagulation is the most important one. Surgery can be reserved for patients who do not response to thrombolytic therapy, We have experienced 3 cases of prosthetic valve thrombosis treated by thrombolytic therapy by use of urokinase and heparin. Two patients fully recovered and returned to their employments and active lives but 1 patient,died of intracerebral hemorrhage and infarction. We report prosthetic valve thrombosis thrombolytic therapy with urokinase and heparin which was detected and serially followed by 2-dimensional echocardiography, cinefluoro copy, and monitoring of Swan-Ganz catherterized pressures.

• Journal of Korean Neurosurgical Society
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• v.51 no.1
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• pp.51-53
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• 2012

Spontaneous hematomas of the iliacus muscle are rare lesions and these are seen in individuals receiving anticoagulation therapy or patients with blood dyscrasias such as hemophilia. It can cause femoral neuropathy and resultant pain and paralysis. Although there is no clear consensus for the treatment of femoral neuropathy from iliacus muscle hematomas, delays in the surgical evacuation of hematoma for decompression of the femoral nerve can lead to a prolonged or permanent disability. We report here on a rare case of a spontaneous iliacus muscle hematoma that caused femoral neuropathy in a patient who was taking warfarin for occlusive vascular disease and we discuss the treatment.

• Journal of Chest Surgery
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• v.20 no.1
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• pp.13-21
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• 1987

To clarify the difference between the outcome of warfarin anticoagulation and the antiplatelet [Aspirin, Dipyridamole] therapy after bioprosthetic heart valve replacement, we compared the following two groups. Group I [Warfarin group] consisted of 557 patients undergone lonescu - Shiley valve replacement between January, 1979 and December, 1985, and treated with scheduled warfarin therapy at Seoul National University Hospital. Group II [Antiplatelet group] consisted of 128 patients undergone lonescu - Shiley, Carpentier - Edwards or Wessex bioprosthetic valve replacement between March, 1983 and December, 1986, and treated primarily with antiplatelet therapy [Aspirin plus Dipyridamole] at SeJong General Hospital. The two groups were similar with respect to age, number of valves utilized per patient, type of operation and risk factors of thromboembolism. In group I, 522 patients excluding 35 hospital death [hospital mortality 6.3%], and in group II, 119 survivors excluding 9 hospital death [hospital mortality 7.0%] were followed. In group I, there were 13 fatal complications, of which seven were thromboembolic [0.6% / pt-yr] and six hemorrhagic [0.5%/pt-yr] during the period of four years. In group II, there were 3 fatal thromboembolic complications [2.3%/pt-yr] during the period of four years. This showed no statistically significant difference. Apart from fatal complications, there were lots of warfarin related minor complications in group I comparing with those of group II. The actuarial probability of the freedom from thromboembolism and of the freedom from fatal complications were very similar at each corresponding years postoperatively. As a result, warfarin anticoagulation in patients with bioprosthetic valve replacement did not reveal any significant advantages over antiplatelet therapy.

• 한국임상약학회:학술대회논문집
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• 2004.07a
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• pp.51-59
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• 2004

• Journal of Chest Surgery
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• v.41 no.4
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• pp.484-488
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• 2008

During long-term anticoagulation treatment with using heparin in a pregnant patient with a mechanical mitral prosthesis, we observed several anticoagulation-related complications, including repeated prosthetic valve thrombosis. This was found to be caused by heparin resistance due to an anti-thrombin III deficiency. Thrombolytic therapy using urokinase or tissue plasminogen activator (tPA) was successful and safe for her as well as her baby.