Preload and AfterloadKhan Academy
A649 Effects of Preload and Afterload on the Contraction of Post-Ischemic Myocardiumdoi:10.1097/00000542-199009001-00647Buffington, CharlesCoyle, RichardAnesthesiology
Ventricular function can be analyzed from measures of the ejecting phase of contraction (e.g. velocity and extent of wall shortening) in terms of the appropriateness of the matching between afterload and the level of inotropic state, as modulated by the preload. In the normal heart, under contr...
Focuses on a study which examined the individual effects of preload, afterload and contractility on torsion using magnetic resonance imaging (MRI) with tissue tagging which permits the accurate measurement of torsion. Effect of preload and afterload on torsion; Inotropic effect on torsion; Result of ...
load and Afterload? In Acute Right Ventricular Failure, What are the Effects of Preload and Afterload?In Acute Right Ventricular Failure, What are the Effects of Preload and Afterload?Keywords acute right ventricular failurepreloadafterloadpulmonary embolismright ventricular infarct...
Response of rotary blood pumps to changes in preload and afterload at a fixed speed setting are unphysiological when compared with the natural heart . Artificial Organs . 2011; 35 ( 3 ):E47–E53. doi: 10.1111/j.1525-1594.2010.01168.x...
In contrast, the conventional mechanical efficiency of the ventricle is known to vary between 0 and 30%, depending on these conditions. In this study, we derived an equation for the conventional mechanical efficiency as a function of ventricular preload, afterload, and contractility, based on the...
The LV performance (shortening fraction), preload (LV end-diastolic dimension), afterload (wall stress), contractility, heart rate, and peak systolic blood pressure were measured. Data could be obtained during 98% of the exercise studies. The LV performance, heart rate, blood pressure, and ...
The impact of mitral regurgitation (MR) on left ventricular (LV) function and remodelling has been typically described in terms of a pure volume overload. In fact, LV afterload in MR is sometimes believed to be below normal 'because the ... P Martinez-Legazpi,R Yotti,J Bermejo - 《Heart...
This model is an extension of a denervated model developed earlier and accurately simulates the ventricular responses to variouspreloadand afterload conditions at a given ionotropic state. springer In order to avoid the transmission of vibrations, apreloadingmeans (24) is provided topreloadthe select...