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- Lane, Deirdre A, et al.
(författare)
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Cardiac tachyarrhythmias and patient values and preferences for their management : the European Heart Rhythm Association (EHRA) consensus document endorsed by the Heart Rhythm Society (HRS), Asia Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardíaca y Electrofisiología (SOLEACE).
- 2015
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Ingår i: Europace. - : Oxford University Press (OUP). - 1099-5129 .- 1532-2092. ; 17:12, s. 1747-1769
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Tidskriftsartikel (refereegranskat)abstract
- Cardiac tachyarrhythmias are recurrent or chronic and in some cases life-threatening conditions. Heart rhythm disturbances are often highly symptomatic and the psychological impact of the disease can be significant. Patients' beliefs and knowledge about their health (and illness), medications, and healthcare they receive are important determinants of whether or not they accept recommended treatments; influence their coping responses to their illness and treatment; adherence to recommended therapy; and ultimately affects health outcomes. Incorporation of patients' values and preferences for therapy should now be considered as an integral part of the decision-making process and treatment strategy.It is important to acknowledge and understand the impact of cardiac tachyarrhythmias on the patient. To address this issue, a Task Force was convened by the European Heart Rhythm Association (EHRA), and endorsed by the Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardíaca y Electrofisiología (SOLEACE), with the remit to comprehensively review the published evidence available, to publish a joint consensus document on patient values and preferences for the management of cardiac tachyarrhythmias, and to provide up-to-date consensus recommendations for use in clinical practice.Hence this unique consensus document focuses on patients, summarizing the available literature on patients' experiences of living with various cardiac tachyarrhythmias and their treatment preferences, and identifies gaps in knowledge which will help to inform clinical practice and future research. The document will also summarize key points for discussions with patients during consultations regarding their condition, treatment options, disease trajectory, treatment goals, and outcomes. Finally, this document provides links to useful resources and patient advocacy groups and organizations and professional societies relevant to each group of cardiac tachyarrhythmias.
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- Wreland Lindström, Rakel, et al.
(författare)
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Fuel cell performance using a phosphonated polysulphone ionomer (PSUgPVPA) in the PEM cathode electrode
- 2013
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Ingår i: Fuel Cell Membranes, Electrode Binders, And Mea Performance. - : Electrochemical Society. - 9781607683940 ; 45:23, s. 33-45
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Konferensbidrag (refereegranskat)abstract
- Inexpensive and environmentally friendly electrolyte polymers that can be operated at higher temperatures and drier conditions are highly interesting for PEM fuel cells for automotive, portable power and stationary electricity generation applications. In this study an ionomer based on polysulfone grafted with poly(vinylphosphonic acid) (PSUgPVPA) in the cathode Pt/C catalyst layer (CL) was electrochemically characterized and compared to Nafion (R). The performance at different levels of humidity at 80 degrees C was evaluated by polarization and cyclic voltammetry. The results show that the performance of the PSUgPVPA-based cathode CL is comparable to that of Nafion (R) at 100% relative humidity (RH) but with some instabilities. However, at drier conditions significant losses of performance for the PSUgPVPA-based cathode was observed, concomitant to a reduced electrochemical surface area. The lower performance at low humidity is concluded to be due to a combination of lower proton conductivity and wettability or interference with oxygen reduction reaction at lower RH.
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- Wreland Lindström, Rakel, et al.
(författare)
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Performance of Phosphonated Hydrocarbon Ionomer in the Fuel Cell Cathode Catalyst Layer
- 2013
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Ingår i: Journal of the Electrochemical Society. - : The Electrochemical Society. - 0013-4651 .- 1945-7111. ; 160:3, s. F269-F277
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Tidskriftsartikel (refereegranskat)abstract
- Inexpensive and environmentally friendly electrolyte polymers that can be operated at higher temperatures and drier conditions are highly interesting for PEM fuel cells for automotive, portable power and stationary electricity generation applications. In this study an ionomer based on polysulfone grafted with poly(vinylphosphonic acid) (PSUgPVPA) in the cathode Pt/C catalyst layer was electrochemically characterized and compared to Nafion. The performance at different levels of humidity at 80 degrees C was evaluated by polarization measurements, cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The results show that the performance of the PSUgPVPA-based cathode catalyst layer is comparable to that of Nafion-at 100% relative humidity (RH) but with some instabilities. However, at drier conditions significant losses of performance for the PSUgPVPA-based cathode was observed. This could be an effect of catalyst poisoning by the ionomer interfering with ORR. However, the concomitant decrease of the electrochemical surface area, double layer capacitance and increased imaginary impedance, indicate that the poorer performance at low humidity is mainly an effect of reduced catalyst wetting by the ionomer in combination with the decreased proton conduction in the ionomeric phase.
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