Affects of left ventricular pacing on cardiac performance and on quality of life in patients with drug refractory heart failure

We assessed the effects of left ventricular pacing on echocardiographic and clinical parameters in 13 consecutive patients with heart failure and bund le branch block by means of a controlled acute and medium-term evaluation. Left ventricular pacing induced a significant improvement in left ventricul ar ejection fraction, Minnesota Living with Heart Failure Questionnaire sco re, New York Heart Association class, and 6-minute walking test compared wi th sinus rhythm or right ventricular pacing.