Pharmacological trials including patients with more severe heart failure were more likely to show a significant improvement with therapy than trials of milder heart failure .
Using mean values in these trials , the age of patients appeared a more important determinant of 6MWT distance than New York Heart Association classification .
The 6MWT has not yet been proven to be a robust test for the identification of effective pharmacological interventions although it appears useful for the assessment of cardiac resynchronization therapy .
The results of the 6MWT were concordant with changes in symptoms , suggesting that it may be used as supportive evidence for symptom benefit .
AIMS The 6 min walk test ( 6MWT ) is commonly used in clinical trials to assess treatments for heart failure , but its ability to distinguish between effective and ineffective treatments is question able .
The aim of this study is to investigate , using a systematic literature review , the utility of the 6MWT as a measure of the effectiveness of treatment in r and omized controlled trials of heart failure .
Randomized study assessing the effect of digoxin withdrawal in patients with mild to moderate chronic congestive heart failure: results of the PROVED trial. PROVED Investigative Group.
OBJECTIVES The purpose of this study was to determine whether digoxin is effective in patients with chronic , stable mild to moderate heart failure . BACKGROUND Digoxin has been a traditional therapy in heart failure , but method ologic limitations in earlier studies have prevented definitive conclusions regarding its efficacy . METHODS Withdrawal of digoxin ( placebo group , n = 46 ) or its continuation ( digoxin group , n = 42 ) was performed in a prospect i ve , r and omized , double-blind , placebo-controlled multicenter trial of patients with chronic , stable mild to moderate heart failure secondary to left ventricular systolic dysfunction who had normal sinus rhythm and were receiving long-term treatment with diuretic drugs and digoxin .  RESULTS Patients withdrawn from digoxin therapy showed worsened maximal exercise capacity ( median change in exercise time -96 s ) compared with that of patients who continued to receive digoxin ( change in exercise time + 4.5 s ) ( p = 0.003 ) . Patients withdrawn from digoxin therapy showed an increased incidence of treatment failures ( p = 0.039 ) ( 39 % , digoxin withdrawal group vs. 19 % , digoxin maintenance group ) and a decreased time to treatment failure ( p = 0.037 ) . In addition , patients who continued to receive digoxin had a lower body weight ( p = 0.044 ) and heart rate ( p = 0.003 ) and a higher left ventricular ejection fraction ( p = 0.016 ) . CONCLUSIONS These data provide strong evidence of the clinical efficacy of digoxin in patients with normal sinus rhythm and mild to moderate chronic heart failure secondary to systolic dysfunction who are treated with diuretics
Pharmacological trials including patients with more severe heart failure were more likely to show a significant improvement with therapy than trials of milder heart failure .
Using mean values in these trials , the age of patients appeared a more important determinant of 6MWT distance than New York Heart Association classification .
The 6MWT has not yet been proven to be a robust test for the identification of effective pharmacological interventions although it appears useful for the assessment of cardiac resynchronization therapy .
The results of the 6MWT were concordant with changes in symptoms , suggesting that it may be used as supportive evidence for symptom benefit .
AIMS The 6 min walk test ( 6MWT ) is commonly used in clinical trials to assess treatments for heart failure , but its ability to distinguish between effective and ineffective treatments is question able .
The aim of this study is to investigate , using a systematic literature review , the utility of the 6MWT as a measure of the effectiveness of treatment in r and omized controlled trials of heart failure .