Is Tau dispensable?

Left ventricular diastolic time constant, Tau is the most established index to describe diastolic function. A Harvard method of Tau was invented by Dr JD Thomas has been dominant non-invasive Tau measurement for more than two decades. Now, Tau is dead clinically. Only when the logically flawed celebrity method is objectively reassessed and discarded, can Tau be given a chance. A new method is dawning and promising…

A Brief History of Tau with Links You Might Need!

A Brief History of Tau

1976, Tau was born in John Hopkins.
1992, the first non-invasive try, Harvard.
1992, the first formula, with four assumptions, Harvard.
1993, another non-invasive try with decent data, Mayo Clinic.
1995, a similar strategy applied to AI patients, Japan.
1995, I published a MR based formula with one assumption.
1997, the Harvard formula was validated in Cleveland.
2005, Langer presented a non-zero asymptote model.
2008, I improved my MR based formulas, without assumption.
2008, I did a similar deduction for AI based Tau.
2008, Chen developed program for my formulas, free download.
2008, my poster in ASE 19th Annual Scientific Sessions.
2009, my poster in CSE forum.
2009, DF guideline (ASE) recommended Harvard formula.
2009, I gave my opinion about the guideline recommendation.
2009, "Response to Bai" from guideline writing group. It motivated me to create this Blog.
2010, Dr Wang and me presented general Tau.
2011-11-29, I gave a talk in National Capital Echo Round (Ottawa)
2016-03-29, I gave a talk at the Heart Institute, the North Hospital (Shenyang, China)
2016-04-01, I gave a talk at the Cardiac Function Dept., the 1st Clinical College, Chinese University of Medicine. (Shenyang, China)
2016, Symmetry inspired by the approach of Tau.
2017, Calculation of LAP (based on my formulas) got a Chinese Natural Science Founding.

Saturday, April 10, 2021

The Biggest Scandal in Echocardiography

Tau is the most established index to describe diastolic function. It is dead in daily clinic due to a misleading method developed and maintained by some celebrity researchers. Never working, the theory can still be in a dominant position for more than two decades. 

It is a scandal, probably the biggest one in Echocardiography. 


1992, Dr James Thomas developed a formula to calculate Tau non-invasively and verified it experimentally. Since the theory is incorrect, the verification has to be fabricated, nobody can get "good data" by unintentional mistakes. 

1997, the formula was "verified clinically" by Dr Pieter Vandervoort. The paper was published in Circulation. By then, the emperor's new clothes was completely ready and the parade was on, but Tau died clinically. 


The main authors were repeatedly reminded of correcting the mistake, nobody addressed the issue:

.For more than two decades, the parade just dragged on 

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