väljutusmahtu

Väljutusmahtu, often translated as ejection volume or discharge volume, is a term used in medicine, particularly in cardiology, to describe the amount of blood pumped out of a ventricle of the heart during each contraction. It is a crucial parameter for assessing the heart's pumping efficiency and overall function.

In a healthy heart, the left ventricle ejects a significant portion of its blood volume with each beat. This volume is typically measured in milliliters (mL). The ejection fraction, a related but distinct concept, is the percentage of blood pumped out of the ventricle during one contraction. While ejection volume is the absolute amount of blood, ejection fraction provides a relative measure of the heart's performance.

A reduced väljutusmahtu can indicate impaired contractility of the heart muscle, often seen in conditions such as heart failure, myocardial infarction (heart attack), or cardiomyopathy. Conversely, an abnormally high väljutusmahtu might be observed in certain hyperdynamic states or with specific types of valve regurgitation where the ventricle needs to pump out more blood to compensate for leakage.

Measurement of väljutusmahtu is commonly performed using echocardiography (ultrasound of the heart), cardiac MRI, or cardiac catheterization. These diagnostic tools allow clinicians to quantify this important hemodynamic parameter and guide treatment strategies for patients with cardiovascular disease. Understanding väljutusmahtu is essential for diagnosis, prognosis, and monitoring the effectiveness of therapeutic interventions aimed at improving cardiac function.