…functional ventricular abnormalities and progressive neurohormonal activation. The therapeutic rationale for disease modifying treatment is to reduce mortality, prevent recurrent hospitalization for worsening heart failure…

…Ratio of distal coronary pressure (Pd) to aortic pressure (Pa) at maximal pharmacologic hyperemia (adenosine); approximates fraction of normal maximal flow preserved by the stenosis…

…ischemic heart disease (coronary heart disease) are among the common causes. The mechanisms leading to deterioration in ejection fraction vary for these conditions. Two exa

…VTI} ] The constant ( 0.785 ) ((\pi/4)) converts diameter to cross sectional area. Shunt Fraction (Qp/Qs) : [ \text{Qp/Qs} = \frac{\text{Aortic SV…

…Heart failure extends across the full range of LVEF, and echocardiographic measurement is subject to meaningful variability. HFmrEF may therefore represent several clinically distinct trajectories…

…failure (HF) is a clinical syndrome in which the heart cannot deliver blood at a rate appropriate to tissue requirements unless filling pressures are elevated…

…shortening correlates strongly with ejection fraction. Similar to ejection fraction, fractional shortening is affected by preload and afterload. It possible to calculate fractional shortening using…

…hemodynamic criterion underscores that "preserved" ejection fraction does not equate to normal cardiac function, but rather to a state where stroke volume is maintained only…

…a left ventricular ejection fraction (LVEF) of ≤40% [14, 26, 27] . Recent guideline updates have introduced critical nuances to HF terminology to reflect the dynamic…