Eligibility
Studies published in full-text form in PubMed or Web of science with ≥10
patients and using cardiac ultrasound techniques to assess LV chamber
stiffness or myocardial stiffness were included. Studies published in
non-English language journals, published in abstract form, assessing
non-cardiac stiffness, assessed by methods other than cardiac ultrasound
techniques, or with fewer than 10 subjects were excluded.