The Harvard method was invented in 1992 by Dr James Thomas from Harvard and got a brief experimental verification.

*Thomas JD, Flachskampf FA, Chen C, **Guererro JL, Picard MH, Levine RA, Weyman AE**. Isovolumic relaxation time varies predictably with its time constant and aortic and left atrial pressure: implications for the noninvasive of ventricular relaxation.** **Am Heart J.** **1992;**124**:1305–1313.** **[PubMed]** **[Google Scholar]*

Five years later, the method was clinically verified at Cleveland and the result was published in Circulation.

*Scalia GM, Greenberg NL, McCarthy PM, Thomas JD,**Vandervoort PM**. Noninvasive assessment of the ventricular relaxation time constant in humans by Doppler echocardiography.** **Circulation.** **1997;**95**:151–155.** **[PubMed]** **[Google Scholar]*

Simple and clear, the formula has logic flaws: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6558577/pdf/jgc-16-05-429.pdf

To prove a flawed formula, the authors had to fabricate evidence. Nobody can get "meaningful" data by unintentional mistakes.

For more than two decades, quite a few projects have been based on the Harvard method of Tau. This is embarrassing.

Please get the above two "fake testimony" papers retracted.

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