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  • 1.
    Björck, Fredrik
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Ek, Agnes
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Johansson, Lars
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Själander, Anders
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Warfarin persistence among atrial fibrillation patients – why is treatment ended?2016Ingår i: Cardiovascular Therapeutics, ISSN 1755-5914, Vol. 34, nr 6, s. 468-474Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background and Aim

    Warfarin treatment discontinuation is significant among patients with atrial fibrillation (AF). Studies mainly focused on whether the proportion of warfarin persistence and discontinuationare clinically appropriate are absent. This study evaluates warfarin persistence with focus on predictors for, and reasons to, warfarin discontinuation in AF patients.

    Methods

    From the national quality register AuriculA, all AF patients in Sundsvall, Sweden, on warfarin treatment on January first, 2010 were included. These 478 patients were followed until discontinuation or study-stop December 31, 2013. By going through each patient’s medical record risk factors for thromboembolism, bleeding and causes of discontinuation were obtained.

    Results

    Proportion of warfarin persistence was 0.91 (95% confidence interval (CI) 0.89 to 0.93) after one year and 0.73 (95% CI 0.69 to 0.77) after four years. Previous intracranial bleeding, excessive alcohol use, anemia and pulmonary or peripheral emboli were each associated with over two times higher risk of discontinuation (hazard ratio (HR) 5.66, CI 2.23-14.36, HR 2.54, CI 1.48-4.37, HR 2.40, CI 1.38-4.17, and HR 2.13, CI 1.02-4.46). Among patients discontinuing, 50.5% were due to questionable causes, such as sinus rhythm (33.9%), patients demand (10.1%) and falls (8.2%). The majority (43.1%) of treatment discontinuers were changed to aspirin, while 40.4% of them were left without medical stroke prophylaxis.

    Conclusions

    Although persistence to warfarin among AF patients proves higher than previously reported, there is room for improvement since half of the discontinuers have questionable reasons for treatment stop and the majority of them receive no other efficient stroke prophylaxis.

  • 2.
    Hagg, Lovisa
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Johansson, Cecilia
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Jansson, Jan-Håkan
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    Johansson, Lars
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
    External Validity of the ARISTOTLE Trial in Real-Life Atrial Fibrillation Patients2014Ingår i: Cardiovascular Therapeutics, ISSN 1755-5914, Vol. 32, nr 5, s. 214-218Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective

    Our primary objective was to determine the proportion of patients with atrial fibrillation (AF) eligible for enrollment in a randomized controlled trial for a novel oral anticoagulant, the ARISTOTLE trial. A secondary objective was to describe the reasons for trial ineligibility.

    Methods

    We performed a cross-sectional study of an unselected population including 2274 patients in Skelleftea, Sweden with at least one verified episode of AF on or before December 31, 2010. Patients were classified as suitable or unsuitable for anticoagulant treatment according to current guidelines. The enrollment criteria from the ARISTOTLE trial were extracted from the original publication and applied to the population.

    Results

    Among all patients with AF, 1579 were classified as suitable for anticoagulant treatment. Of these, only 658 patients (42%) were eligible for participation in the ARISTOTLE trial. Among the 921 patients ineligible for participation, 498 did not meet the ECG criteria, 272 had psychosocial problems, and in addition, 78 patients were excluded due to both of these criteria.

    Conclusion

    Our study shows that a majority of the patients in an unselected population with AF suitable for anticoagulant treatment were ineligible for participation in the ARISTOTLE trial. The applicability of the ARISTOTLE trial is therefore unknown for a considerable proportion of patients with AF in real life.

  • 3.
    Norberg, Helena
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för farmakologi och klinisk neurovetenskap, Farmakologi. Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin.
    Bergdahl, Ellinor
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin.
    Lindmark, Krister
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin.
    Safety and Tolerability of Initiating Maximum-Dose Sacubitril-Valsartan in Patients on Target Dose Renin-Angiotensin System Inhibitors2019Ingår i: Cardiovascular Therapeutics, ISSN 1755-5914, Vol. 2019, artikel-id 6745074Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aim. Sacubitril-valsartan has proven beneficial in heart failure with reduced ejection fraction. Guidelines recommend initiating half-dose sacubitril-valsartan before up-titration even to patients already on target dose angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARB). To reduce the number of titration steps needed in order to simplify for the patient as well as the clinic, we aimed to investigate the safety and tolerability of switching patients on target dose ACE inhibitors or ARBs directly to maximum-dose sacubitril-valsartan. Methods. This prospective cohort study was conducted between April 2016 and November 2017. A total of 66 patients with heart failure and reduced ejection fraction already on guideline-recommended target dose ACE inhibitors or ARBs (equivalent to enalapril 10 mg twice daily) were switched to maximum-dose sacubitril-valsartan (200 mg twice daily). The patients were followed for twelve months. Results. Patients had a mean age of 72 +/- 10 years, mean systolic blood pressure of 121 +/- 17 mmHg, and 92% were male. At 12-month follow-up, nine patients (14%) had discontinued sacubitril-valsartan, four patients (6%) had a dose reduction, and 17 patients (26%) had developed symptomatic hypotension. No angioedema occurred within the 12-month follow-up and there were no hospitalizations or emergency room visits within the first 14 days. Conclusions. Switching directly from target dose ACE inhibitors or ARBs to maximum-dose sacubitril-valsartan was safe and generally well tolerated.

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