منابع مشابه
Different determinants of exercise capacity in HFpEF compared to HFrEF
BACKGROUND Quality of life is as important as survival in heart failure (HF) patients. Controversies exist with regards to echocardiographic determinants of exercise capacity in HF, particularly in patients with preserved ejection fraction (HFpEF). The aim of this study was to prospectively examine echocardiographic parameters that correlate and predict functional exercise capacity assessed by ...
متن کاملQuality of life questionnaire predicts poor exercise capacity only in HFpEF and not in HFrEF
BACKGROUND The Minnesota Living with Heart Failure Questionnaire (MLHFQ) is the most widely used measure of quality of life (QoL) in HF patients. This prospective study aimed to assess the relationship between QoL and exercise capacity in HF patients. METHODS The study subjects were 118 consecutive patients with chronic HF (62 ± 10 years, 57 females, in NYHA I-III). Patients answered a MLHFQ ...
متن کاملAbout the impossibility to prove P=NP or P!=NP and the pseudo-randomness in NP
The relationship between the complexity classes P and NP is an unsolved question in the field of theoretical computer science. In this paper, we look at the link between the P NP question and the “Deterministic” versus “Non Deterministic” nature of a problem, and more specifically at the temporal nature of the complexity within theNP class of problems. Let us remind that the NP class is called ...
متن کاملfrequency lowering
background and aim: it has been several decades since the technology of frequency lowering (fl) has been proposed. however, primary research has revealed no benefits regarding the use of this technique. currently, new methods for fl and improvement of perception of speech and fricative sounds have led to the application of these methods by numerous companies to produce hearing aids. in this stu...
متن کاملNP-Completeness and Disjoint NP-Pairs
We study the question of whether the class DisjNP of disjoint pairs (A,B) of NPsets contains a complete pair. The question relates to the question of whether optimal proof systems exist, and we relate it to the previously studied question of whether there exists a disjoint pair of NP-sets that is NP-hard. We show under reasonable hypotheses that nonsymmetric disjoint NP-pairs exist, which provi...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 2019
ISSN: 0735-1097
DOI: 10.1016/j.jacc.2019.06.056