Tachycardia shortens ventricular diastole, the filling phase, so less oxygenated blood is available for delivery to the body. The values most often used to measure afterload are pulmonary vascular resistance and systemic vascular resistance. As LVSW decreases, left ventricular performance is reduced, which results in a decrease in the SV and left ventricular ejection fraction. When RVSW decreases, right ventricular performance is reduced. As a result, SV and right ventricular ejection fraction decrease.
Cardiac output is a key hemodynamic parameter.
To accurately assess your patient's condition and intervene appropriately, you need to know how to measure CO precisely. Today, the clinical gold standard for measuring CO is thermodilution. Both are reliable and easily performed at the bedside. You obtain thermodilution CO values via a PA catheter. Because thermal energy acts as the input signal, bolus injections aren't required.