Endesystolisk

Endesystolisk is a medical term used in cardiology, particularly in Scandinavian languages, to describe phenomena, measurements, or structures at the end of ventricular systole. Systole is the phase of the cardiac cycle when the ventricles contract and eject blood into the aorta and pulmonary artery. Endesystolisk refers to the end-systolic moment, and in practice it is often synonymous with end-systolic in English. The term is commonly applied to measures taken at end-systole, such as end-systolic volume and end-systolic pressure.

End-systolic volume (ESV) is the amount of blood remaining in a ventricle at the end of systole. It is typically determined by imaging methods such as echocardiography, cardiac magnetic resonance imaging, or computed tomography. ESV, together with end-diastolic volume (EDV), determines the stroke volume and the ejection fraction (EF), with EF calculated as (EDV − ESV) / EDV. End-systolic pressure, when available, refers to the pressure inside the ventricle at the end of systole and can be used in discussions of ventricular load and contractile performance.

Related concepts include the end-systolic pressure-volume relationship (ESPVR) and end-systolic elastance (Ees), which describe the ventricle’s contractility and how afterload affects performance at end-systole. Clinically, a larger ESV or a lower EF can indicate systolic dysfunction, dilated cardiomyopathy, or altered afterload, guiding diagnostic assessment and treatment planning.

Overall, endesystolisk is a descriptive term for features observed at the end of systole, with its clinical relevance grounded in measurements of ventricular function and contractility.