Failure to maintain normal ejection indices under conditions of acute or chronic mechanical overload can be explained in terms of an excessive afterload relative to the degree of hypertrophy, the level of inotropic state, and the Frank--Starling rereserve. The concept of afterload mismatch is ...
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At a specific programmed pump speed, LVAD output is dependent on preload and sensitive to afterload. Preload is a function of LV filling, which is primarily determined by volume status/filling pressure and right heart function. It is axiomatic that the right heart must generate adequate output to...
Using conventional echocardiography, left ventricular ejection fraction (LV EF) and fractional shortening are routinely used [1]. However, these variables depend on preload and afterload conditions [2]. They can be difficult to interpret in unstable patients such as those in septic shock [3]. ...
Conclusion: When preload and afterload are unaltered after the race, because of the adoption of a unique assessment posture, LV systolic function is not depressed. A depression in LV diastolic function persists which is not explained by an increase in heart rate after the race.M Y Hassan...
(Figure 3A). This phenomenon can be explained by the heterogeneity of the shapes of the RV trabeculae. In each heart, the trabeculae are arranged differently and have different lengths, widths and thicknesses. In the atria, on the other hand, it is possible to cut a strip of tissue with...