GLS has been around for ~20yrs. Zillions of *observational* studies (some prospective, some retro) showing that reduced GLS *associated with* bad outcomes. Unless I've missed it, yet to see a single RCT showing that managing pts based on GLS improves outcomes…too harsh? (1) https://t.co/jJQrcAkse4
— Benoy Shah MD (@dr_benoy_n_shah) September 15, 2020
