Measurement of cardiac muscle relaxation in hypothyroidism.
- 5 June 1976
- Vol. 1 (6022) , 1366-1368
- https://doi.org/10.1136/bmj.1.6022.1366
Abstract
The isovolumetric relaxation time of the left ventricle (IRT) in 20 hypothyroid patients (133 +/- (SE of mean) 4 ms) was significantly longer than that in 23 normal subjects (95 +/- 3 ms). During a trial of thyroxine replacement the IRT in 12 hypothyroid patients fell from 143 +/- 4 ms to 107 +/- 4 ms. The IRT seems to be a useful index of end-organ function in hypothyroidism.Keywords
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