Radiocardiographic measurement of minimum central transit times by means of indium-113m-DTPA and of a 8-crystal radiocardiograph (Gamma Retina VI). Comparative investigations on non-trained and athletics in repose and after stress (in German)
The minimum cardiac transit times (MTT's) at rest and following sub- maximum stresses were measured in 97 individual examinations of untrained persons and high performance athletes. It turned out that there is a strong dependence on cardiac frequency of the MTT's. This relation can be described quite satisfactorily by a hyperbolic function and in this way allows a frequency correction to be made of the MTT's. The MTT's standardized in this way (MTT.f values) represent the quotient of the end diastolic segment volume/beat volume. In the whole lesser circulatory system almost identical MTT.f values were found for the two groups under comparison at rest and following stress. In the ventricles, however, and especially so in the left ventricle, the MTT.f values were clearly higher with athletes than with untrained persons, but they strongly decreased after stresses, while the respective values remained almost constant in ordinary persons. (orig./RF)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-33-007641
- OSTI ID:
- 4148615
- Resource Relation:
- Other Information: Thesis. Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- Germany
- Language:
- German
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Related Subjects
550601* -Biomedical Sciences
Basic Studies-Medicine- Unsealed Radionuclides in Diagnostics
*RADIOCARDIOGRAPHY- INDIUM 113
BLOOD CIRCULATION
DTPA
GAMMA CAMERAS
ISOMERIC NUCLEI
LABELLED COMPOUNDS
MASS TRANSFER
MYOCARDIUM
PERSONNEL
STRESSES
TIME DEPENDENCE