Concurrent Aortic and Mitral Valve Echocardiography Permits Measurement of Systolic Time Intervals as an Index of Peripheral Tissue Thyroid Functional Status*

127 subjects categorized by clinical symptoms and thyroid function tests into 7 groups: normal subjects (n=34), overt hyperthyroid subgroup I (n=12), overt hyperthyroid subgroup II (n=28), subclinical hyperthyroid (n=15), subclinical hypothyroid (n=22), overt hypothyroid subgroup II (n=6), and overt hypothyroidism subgroup I (n=10).

Concurrent aortic and mitral valve echocardiography to measure systolic time intervals (STI)

Normal subjects (n=34)

Systolic time intervals including isovolumetric contraction time (ICT), preejection period (PEP), and PEP/LVETsurrogate