Tau Measurement in an Echo lab

Tau occurs during the isovolumic relaxation time (IVRT), when both the mitral and aortic valves are closed. To investigate any events within the left ventricle during this phase, we must rely on information provided by either mitral regurgitation (MR) or aortic insufficiency (AI).

In MR patient, 

The theory

The verification 

In AI patient, 

The theory

The verification

While the classical concept of Tau remains foundational, the idea of a universal Tau is increasingly coming into focus. Below are the formulas currently proposed for calculating this universal Tau.

The beauty of Nature lies in her simplicity,” noted Dr. Quan Wang, a Fellow of the Royal Society of Canada, as he praised the proposed formulas.

Once again, the concept of a universal Tau is poised to unveil a new dimension—the symmetry in cardiac function assessment. When applied to four Doppler indices, 17 innovative approaches emerged from the shadows. Dr. Sherif Nagueh remarked that these approaches could be particularly valuable, especially in assessing right ventricular (RV) and diastolic function.

What lies ahead remains unknown. This new frontier is open to exploration, and all are welcome to test their ideas and insights.

Thus, it is fair to say: Tau may well revolutionize the assessment of cardiac function.