Impact of Centrifugal-Flow Ventricular Assist Devices on Right Ventricular Pacing Function

Effects of the HeartMate II continuous-flow left ventricular assist device on right ventricular function.

BACKGROUND Continuous-flow devices have become the standard of care for mechanical circulatory support for end-stage heart failure patients because of improved survival and durability. The effects of these devices, such as the HeartMate II (HMII) left ventricular assist device (LVAD), on right ventricular (RV) function have not been evaluated in detail. This study evaluated the incidence of RV ...

Design of a continuous flow centrifugal pediatric ventricular assist device.

Thousands of pediatric patients suffering from cardiomyopathy or single ventricular physiologies secondary to debilitating heart defects may benefit from long-term mechanical circulatory support due to the limited number of donor hearts available. This article presents the initial design of a fully implantable centrifugal pediatric ventricular assist device (PVAD) for 2 to 12 year olds. Convent...

Left ventricular function during and after right ventricular pacing.

OBJECTIVES The aim of this research was to evaluate right ventricular pacing effects on left ventricular function. BACKGROUND Right ventricular pacing alters the ventricular activation sequence and reduces left ventricular ejection fraction (EF). It is unclear whether the observed reduction in EF can be completely attributed to the alteration in activation sequence. METHODS Twelve subjects ...

Influence of right ventricular stimulation site on left ventricular function in atrial synchronous ventricular pacing.

OBJECTIVES The study investigates the correlation between left ventricular function and QRS duration obtained by alternate right ventricular pacing sites. BACKGROUND 1. Right ventricular apical pacing is associated with alterations of left ventricular contraction sequence. 2. A stimulation producing narrow QRS complexes is supposed to provide for better left ventricular contraction patterns. ...

Left Ventricular Assist Devices.