Fung, Jeffrey W H Suboptimal medical therapy in patients with systolic heart failure is associated with less improvement by cardiac resynchronization therapy. [electronic resource] - International journal of cardiology Feb 2007 - 214-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1874-1754 Standard No.: 10.1016/j.ijcard.2006.04.034 doi Subjects--Topical Terms: AgedCombined Modality TherapyElectric CountershockFemaleHeart Failure--drug therapyHumansMaleMiddle AgedRetrospective StudiesSystole