Preload Dependency of Left Ventricular Torsion

Preload Dependency of Left Ventricular Torsion: The Impact of Normal Saline Infusion Running Title: Weiner et al: Preload and Left Ventricular Torsion

Preload dependency of left ventricular torsion: the impact of normal saline infusion.

BACKGROUND left ventricular (LV) rotation results from contraction of obliquely oriented myocardial fibers. The net difference between systolic apical counterclockwise rotation and basal clockwise rotation is left ventricular torsion (LVT). Although LVT is altered in various cardiac diseases, determinants of LVT are incompletely understood. METHODS AND RESULTS LV end-diastolic volume, LV apic...

Independent effects of preload, afterload, and contractility on left ventricular torsion.

Shortening of oblique left ventricular (LV) fibers results in torsion. A unique relationship between volume and torsion is therefore expected, and the effects of load and contractility on torsion should be predictable. However, volume-independent behavior of torsion has been observed, and the effects of load on this deformation remain controversial. We used magnetic resonance imaging (MRI) with...

Left Ventricular Torsion in Humans

Background. The transmural distribution of fiber angles and the extent of shortening among obliquely oriented fibers are likely to be major determinants of the twisting motion that accompanies left ventricular (LV) ejection. As such, measurements of torsion may provide useful information about LV contractile function, but other factors, such as ventricular loading conditions, may also regulate ...

Influence of Preload Reduction on Left Ventricular Diastolic Function in Hemodialysis Patients with Left Ventricular Hypertrophy

Objectives: The purpose of this study was to assess how the preload reduction a#ects left ventricular LV diastolic function in hemodialysis patients with LV hypertrophy. Methods: Subjects included 14 patients with LV hypertrophy receiving hemodialysis. The subjects underwent echocardiographic and pulsed Doppler examinations before and after hemodialysis, and the data were analyzed to determine ...