RT Journal Article SR Electronic T1 Restrictive transmitral filling patterns predict improvements in left ventricular function after biventricular pacing JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1087 OP 1088 DO 10.1136/heart.89.9.1087 VO 89 IS 9 A1 R Thaman A1 R T Murphy A1 S Firoozi A1 S M Hamid A1 J R Gimeno A1 B Sachdev A1 V Paul A1 E Rowland A1 M P Frenneaux A1 P M Elliott YR 2003 UL http://heart.bmj.com/content/89/9/1087.abstract AB