Clinical application of biventricular pacing

Objective To evaluate the clinical efficacy of biventricular pacing on treating patients of chronic congestive heart failure due to ischaemic or dilated cardiomyopathies. Methods Five patients suffered from ischaemic or dilated cardiomyopathies with refractory heart failure were implanted with a coronary sinus(CS) lead into the great (4 cases) or middle (1 cases) cardiac vein,and a right ventricular apex lead.These leads were composed of the right ventricular apical pacing and biventricular pacing.The hemodynamic parameters with different pacing modes were evaluate by the echocardiography and Swan Ganz catheterization. Results The biventricular pacing increased strok volume and cardiac output.The biventricular pacing showed a narrow QRS wave. Conclusion The biventricular pacing might improve the heamodynamics of refractory congestive heart failure patierts.