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Study aim
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The primary objective of the present study is to show the beneficial effect of photobiomodulation therapy(PBMt) on heart failure patients
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Design
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A concealed, randomized, blinded, placebo controlled clinical trial with a parallel group design of 30 heart failure patients with blinded outcome assessment .(Phase 3)
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Settings and conduct
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We will enroll patients who have diagnosed as heart failure reduced ejection fraction for cardiac rehabilitation program. The study will be conducted in cardiac rehb department of Rajaie cardiovascular medical and research center and low level LASER probe will be placed on the forearm skin at the 6 acupuncture points(PC6, PC7,HR4,HR5,HR6,ULNAR ARTERY ACUPOINT).
In the placebo group the LASER system will remain off -state .
Both patient and outcomes evaluator will be blinded
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Participants/Inclusion and exclusion criteria
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Participants: patients who have diagnosed as heart failure (a left ventricular ejection fraction equal or less than 40 %) who have been referred for cardiac rehabilitation program
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Intervention groups
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The patients were randomized into two groups: (1)active Low level LASER therapy group (n=15)—subjects who will be submitted to active laser therapy and (2) placebo low level LASER therapy group (n=15)—subjects who will be submitted to placebo laser
after 20 minutes LASER/placebo therapy ,the patients will go for aerobic sub maximal exercise using ergo meter bike for 20 minutes (5 minutes warm up ,two 10 minutes sessions with 5 minutes rest between them ,5 minutes cool down)
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Main outcome variables
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New-York heart association functional class,6 minutes' walk test distance,serum NT-pro BNP level,quality of life score,Echocardiographic variables(LVEF,left ventricular end systolic and diastolic dimentions,LV global longitudinal strain)