https://www.selleckchem.com/products/BafilomycinA1.html Furthermore, caffeine dose did not influence run time (LD 49.05 ± 3.75min vs. HD 49.06 ± 3.85min, p = 0.979). Belief (n = 9) (LD 48.93 ± 3.71min vs. HD 48.9 ± 3.52min, p = 0.976), and belief + experience (n = 6) (LD 48.68 ± 1.87min vs. HD 49.55 ± 1.75min, p = 0.386) didn't influence this effect. A dose-response to sham caffeine ingestion was not evident on cognitive or endurance performance in healthy individuals, regardless of their convictions about caffeine's ergogenicity. Electrocardiographic abnormalities, such as PR interval prolongation, have been anecdotally reported in patients with aortic root abscess (ARA). An electrocardiographic marker may be useful in identifying those patients with aortic valve endocarditis who may progress to ARA. The objective of this study is to evaluate the change in the PR interval in patients with surgically confirmed ARA and compare it to age- and gender-matched controls with echocardiographically or surgically confirmed aortic valve endocarditis but without aortic root abscess and those hospitalized with diagnoses other than endocarditis. Patients were eligible for enrollment if they were 18years or older and were hospitalized for either ARA, aortic valve endocarditis, or for unrelated reasons and had at least one 12-lead electrocardiogram (ECG) prior to or on the day of hospitalization and at least one ECG after hospitalization but prior to any cardiac surgical procedure. Delta PR interval, defined as the difference between the pre- and.2±18) (p=.003). The findings of our study support the notion that the PR interval is more likely to be prolonged in patients with ARA. Since ARA is associated with a high morbidity and mortality, PR interval prolongation in a patient with aortic valve endocarditis should prompt a thorough evaluation for aortic root involvement. The findings of our study support the notion that the PR interval is more likely to be prolonged in patients wit