During which phase of the cardiac cycle is mitral regurgitation hemodynamic evaluation conducted?

Mitral regurgitation hemodynamic evaluation is primarily conducted during systole because this is the phase when the left ventricle contracts and blood is forced back into the atrium through the incompetent mitral valve. During systole, the evaluation focuses on the volume and pressure changes occurring as blood flows inappropriately due to the regurgitation. This phase is key for understanding the severity and impact of mitral regurgitation on cardiac function, including assessment of the regurgitant volume and the effect on chamber sizes.

In contrast, diastole is primarily the phase when the heart relaxes and fills with blood. While the effects of mitral regurgitation can be observed during this phase, such as changes in left atrial filling, the direct evaluation of the regurgitant flow is predominantly assessed during systole when the regurgitation occurs.