Effect of Exercise Training on Heart Rate Variability in Patients with Heart Failure After Percutaneous Coronary Intervention.

BACKGROUND: This study aims to evaluate the effect of exercise training on heart rate variability (HRV) and to determine the correlation between parameters of HRV and the ejection fraction in patients with heart failure after percutaneous coronary intervention. MATERIAL AND METHODS: Fifty patients with left ventricular ejection fraction ≤ 40% undergone percutaneous coronary intervention were randomly allocated in either an exercise training (ET) group or a control group. The ET group performed exercise training for 45 minutes, three times a week for seven weeks. Patients in both groups received a leaflet for daily exercising at home. HRV parameters comprising, the standard deviation of normal R-R intervals (SDNN), the square root of the mean of the squares of successive R-R intervals differences (RMSSD) ,the percentage of successive R-R intervals differing from more than 50 ms (PNN50), using 24-hour Holter electrocardiographic monitoring was measured. RESULTS: After the intervention, the SDNN improved in the ET group (P=0.002), while changes in all remaining HRV indices were insignificant (P≥0.05). The control group showed no significant changes in any HRV parameters (P≥0.05). Changes in SDNN in the ET group were significantly different from the control group (P=0.003). At baseline, our results revealed a significant weak correlation between ejection fraction and SDNN (r =0.279, P=0.047). However, ejection fraction did not correlate significantly with RMSSD and PNN50. CONCLUSION: Exercise training is safe and feasible in post percutaneous coronary intervention patients, even in those with reduced ejection fraction. In a seven-week period, exercise training was effective in improving HRV in heart failure patients after percutaneous coronary intervention.

Effect of omega-3 on brain natriuretic peptide and echocardiographic findings in heart failure: Double-blind placebo-controlled randomized trial.

BACKGROUND: Possible beneficial effects of dietary omega-3 supplementation on patients with congestive heart failure (CHF) were investigated. METHODS AND RESULTS: 100 patients with CHF who had a tri-chamber pacemaker and automated defibrillator were initially recruited, and 70 agreed to participate.38 patients received 2 g/day of omega-3 and 32 received placebo capsules. BNP level, 6-min walk test and echocardiographic parameters were recorded at baseline and after 6 months of treatment. BNP levels decreased significantly after 6 months in the omega-3 group, from 1766.2 ± 1978.1 pg/mL to 1159.4 ± 1430.9 pg/dL (P < 0.005). Tei index and late diastolic velocity index were significantly improved in treated group. Mortality and hospitalization rates did not differ. CONCLUSION: The beneficial effects of omega-3 supplementation in patients with CHF were not as clear as hypothesized; however, omega-3 fatty acids can result in small changes in plasma BNP levels and modest improvements in echocardiographically assessed diastolic function (Clinical trial.gov registration: NCT01227837).

Research priorities in medical education in the Eastern Mediterranean Region.

Ways are needed to effect quality improvement in medical education research in the Eastern Mediterranean Region (EMR). This study aimed to determine the principle themes and to draw up a list of priorities in medical education research in EMR. Using the nominal group technique with a group of 30 experts, a list of major themes in medical education research was prepared. In a 2-round Delphi survey the list was sent to another 47 experts in the Region with a questionnaire that included open questions about change and reform in medical education. In the final list of 20, the 5 highest priorities identified were: training physicians to be effective teachers; community-driven models for curriculum development; clinical teaching models; education about professionalism and ethics; and education for evidence-based medicine. Themes determined by this survey can help researchers in EMR to focus on priority areas in research.

Research priorities in medical education in the Eastern Mediterranean Region

Ways are needed to effect quality improvement in medical education research in the Eastern Mediterranean Region [EMR]. This study aimed to determine the principle themes and to draw up a list of priorities in medical education research in EMR. Using the nominal group technique with a group of 30 experts, a list of major themes in medical education research was prepared. In a 2-round Delphi survey the list was sent to another 47 experts in the Region with a questionnaire that included open questions about change and reform in medical education. In the final list of 20, the 5 highest priorities identified were: training physicians to be effective teachers; community-driven models for curriculum development; clinical teaching models; education about professionalism and ethics; and education for evidence-based medicine. Themes determined by this survey can help researchers in EMR to focus on priority areas in research