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[The effect of prolonged acenocoumarol therapy on bone density].

The effect of chronic cumarin treatment on bone mineral content was investigated. Bone mineral density was determined by double photon densitometry (Lunar DPXL). The density data (mean +/- SE) of 45 cardiac patients (age: 57.0 = +/- 6.3 y, body mass index: 26.7 +/- 3.8 kp/m2, cardiac stadium score, according to New York Heart Association: 2-3), had been treated by acenocumarol at least for 2 years (duration of treatment: 75.0 +/- 52 months), were compared to the values of 45 age, body mass index, cardiac status matched patients not treated by anticoagulant. The density values of L2-L4 lumbar regions were lower in the treated group (1.041 +/- 0.17 vs. controlls: 1.13 +/- 0.15 g/cm2, p < 0.05), while no differences in ultradistal ulnar and radial regions were detected. No correlation between bone mineral density and the length, or the dose of the cumarin treatment were observed. This observation suggests the importance of the regular bone densitometry control of cumarin treated patient.

Acenocoumarol↗

[Treatment with oral anticoagulants (acenocoumarol): influence of the initial doses in the incidence of hemorrhagic and thromboembolic episodes].

PURPOSE: To compare two initial doses of oral anticoagulant (acenocoumarin) studying the haemorrhagic and thromboembolic episodes occurred during the first month of treatment, the mean time and necessary controls until achievement of the desired level of anticoagulation. PATIENTS AND METHODS: From january 1992 to december 1993; a comparative study of two groups of patients was performed: group 1, compiling 129 patients chosen at random and retrospectively, who begun oral anticoagulant treatment with 4 daily mg of acenocoumarin; and group 2, compiling 129 patients chosen prospectively, who begun with 2 mg daily. In both groups the mean time and the number of controls performed until achieving the desired level of anticoagulation were analyzed, as well as the haemorrhagic episodes occurred during the first month of treatment, their severity (classified into major and minor ones), the level of anticoagulation when they occurred and their possible causes. In the same way the thromboembolic processes occurred during that period in both groups were studied. RESULTS: The mean time necessary to achieve the desired level of anticoagulation was 3.8 days in group 1 and 6.3 in group 2; the mean number of controls performed in group 1 was 1.2 and in group 2 it was 1.8. We have observed 19 haemorrhagic episodes, 15 in group 1 (4 minor and 11 major); and 4 in group 2 (2 minor and 2 major). We have found significant differences with respect to the mean time (p < 0.01), number of controls (p < 0.01) and incidence of hemorrhages (p = 0.017) between groups 1 and 2. One thromboembolic episode was registered in each group: in group 1 a deep venous thrombosis and in group 2 a stroke. CONCLUSION: The initial daily doses of acenocoumarin of 2 mg is as effective as the 4 mg one in the prevention of thromboembolic episodes, with a significant reduction in the number of haemorrhages observed during the first month of treatment. However this produces a prolongation in the necessary mean time and more number of controls performed until the achievement of the desired level of anticoagulation.

Acenocoumarol↗

Triflusal versus oral anticoagulation for primary prevention of thromboembolism after bioprosthetic valve replacement (trac): prospective, randomized, co-operative trial.

OBJECTIVE: Antiplatelet agents are used for prevention of thromboembolism in surgical patients and in patients with chronic atrial fibrillation. Up to date, however, results of randomized studies comparing antiplatelet agents and oral anticoagulation have not been reported. The aim of this study was to compare the efficacy and safety of triflusal (an antiplatelet agent) versus acenocoumarol for primary prevention of thromboembolism in the early postoperative period after implantation of a bioprosthesis. METHODS: In this prospective, multicentric, randomized, open pilot trial, patients were assigned to treatment with triflusal (600mg/d) or acenocoumarol (target INR 2.0-3.0). Study medication was started 24-48h after valve replacement with a bioprosthesis, and continued for 3 months. Four follow-up visits were scheduled: baseline, and at 1, 3 and 6 months thereafter. The primary end-point was a composite of the rate of thromboembolism, severe hemorrhage and valve-related mortality. RESULTS: A total of 193 patients were included (97 received triflusal and 96 acenocoumarol), with a mean age of 72.5 years. Half were men. Aortic valve replacement was performed in 181 patients (93.8%), mitral valve replacement in 10 patients (5.2%) and double valve replacement in 2 (1.0%). Hospital mortality was 11 (5.7%). Primary outcome was recorded in 9 patients with triflusal (9.4%) and in 10 patients with acenocoumarol (11%). There were nine episodes (4.7%) of thromboembolism, six in the triflusal group and three in the acenocoumarol group, and three episodes of permanent neurological deficits, one in the triflusal group and two in the acenocoumarol group. Severe hemorrhage: nine episodes, six in the acenocoumarol group and three in the triflusal group. None of the observed differences in efficacy were statistically significant. Regarding safety, three patients in triflusal group reported at least one hemorrhage, compared to 10 in acenocoumarol group (P=0.048). CONCLUSIONS: There were no significant differences in efficacy between both groups, however, triflusal showed a significantly lower incidence of bleeding episodes.

Acenocoumarol↗