| METHODS AND RESULTS : Eleven patients resynchronized by TCRT 6 + / 1 months before study inclusion ( SYN ) and 10 matched ASY patients underwent blood pressure , heart rate , and MSNA recordings . ^^^ SYN patients had shorter QRS duration and interventricular mechanical delays , longer 6 minute walking distance and lower New York Heart Association class ( all P < . 05 ) than ASY patients . ^^^ MSNA of 56 + / 2 bursts / min in ASY patients was higher than in SYN patients ( 48 + / 3 bursts / min , P < . 05 ) . ^^^ Cardiac index was higher in SYN patients than in ASY patients ( 2 . 8 + / 0 . 2 versus 1 . 9 + / 0 . 2 L . min . m2 , P < . 05 , respectively ) . ^^^ |