Cardiac work (CW)

The left ventricle (LV) systolic function is usually assessed by the cardiac output (CO) parameters such as ejection fraction and shortening fraction. However, these parameters do not take into consideration the role of afterload on LV contractility. Cardiac work (CW) is a parameter which combines the afterload and LV cardiac output to assess the cardiac contractility and the ventricular arterial interaction. CW is measured as the product of CO and mean arterial pressure (MAP). In adult patients with chronic heart failure, low resting CW has been associated with poorer outcomes and higher mortality. However, the role of CW in patients with repaired congenital heart disease (CHD) has not yet been established.

Cardiac work (also called cardiac minute work or ventricular minute work) is the product of stroke work and heart rate, which is the equivalent of the triple product of stroke volume, aortic pressure, and heart rate. Because this is the rate of doing work (work per unit time), it represents the power of the ventricle.

1.       https://publications.aap.org/pediatrics/article/146/1_MeetingAbstract/617/4703/Cardiac-Work-A-New-Parameter-to-Asses-the?autologincheck=redirected

2.       https://www.scymed.com/en/smnxph/phmcc770.htm

3.       https://www.scymed.com/en/smnxph/smnxph.htm#phmao000

4.       https://cvphysiology.com/cardiac-function/cf019#:~:text=Cardiac%20work%20(also%20called%20cardiac,the%20power%20of%20the%20ventricle.