Short-term curative effects of cardiac-resynchronization therapy in six cases of chronic congestive heart failure

【Objective】 To observe the short-term curative effects of biventricular cardiac resynchronization therapy in patients of chronic congestive heart failure.【Methods】 Biventricular cardiac resynchronization therapy(CRT) underwent in six cases of primary dilated cardiomyopathy with chronic congestive heart failure and prolonged QRS duration(QRS duration≥120 ms).During the 6 months of following-up period.The following parameters were recorded and analyzed: the pacing parameters of left ventricle electrode,the QRS wave width,left ventricular end-diastolic dimension(LVEDD),left ventricular end-systolic dimension(LVESD),left ventricular ejection fraction(LVEF),6-minutes walking test(6 MWT).【Results】 All of 6 cases were implanted CRT devices successfully.Except one case died from stroke three days after the operation,5 cases were completed the 6 months of follow-up.By the end of the 6th month after the operation,the pacing parameters of left ventricle electrode(the pacing voltage,the resistance and the sensitivity) are stable very much.Compared to before the operation,the width of QRS wave is obviously narrower,the LVEDD,LVESD and the LVEF were significantly improved,6 MWT was significantly increased.【Conclusion】 CRT is one of the effective therapies for the patients of chronic congestive heart failure accompanying electromechanical dissynchrony.