Search for: [Abstract = "The aim of this project was to assess the clinical state, tolerance for physical exertion, NT\-proBNP levels and quality of life \(QoL\) of patients after initiation of cardiac resynchronization therapy \(CRT\) as well as to verify the working hypothesis that QoL correlates with improvement in clinical, electrocardiographic, echocardiographic and biochemical indicators. The aim of this project was to approach this problem by attempting to answer the question of whether patients who respond to CRT obtain an improvement in QoL in comparison with patients who do not respond to CRT. The study was carried out on 60 patients with chronic heart failure \(NYHA III a IV\) despite of optimal pharmacotherapy and with electrocardiogram QRS duration greater than 120 ms, LVEF ≤ 35% and LVEDd ≥ 55 mm. A subjective and objective examination, laboratory tests including measurement of NT\-proBNP levels, a resting electrocardiogram, six\-minute walk test \(6\-MWT\) and echocardiogram were carried out on the members of the study group before implantation of the CRT device. All of the patients also completed the PGWB quality of life assessment test. Three months after implantation of the CRT device all of the patients made a follow\-up clinical visit during which the tests were repeated. 57 patients completed the three month observation period. Three of the patients from the initial group died. Statistically si"]

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