Scintigraphic determination of ventricular function and coronary perfusion in long-distance runners

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Am. Heart J.; (United States)

DOI:https://doi.org/10.1016/0002-8703(84)90615-X· OSTI ID:6741242

Osbakken, M; Locko, R

Left ventricular function and coronary perfusion were evaluated with rest-exercise gated blood pool and stress-redistribution thallium scans in a group of long-distance runners and compared to a group of catheterization-proved normal subjects. Exercise duration, work load, and oxygen consumption were significantly greater for long-distance runners. Rest end-diastolic volume (EDV), end-systolic volume (ESV), and stroke volumes (SV) were significantly larger in long-distance runners than in control subjects, while ejection fraction (EF), cardiac index (CI), and ejection rate were similar in both groups. Exercise EDV increased and ESV decreased, producing an increase in SV and EF in long-distance runners. Exercise EDV did not change and ESV decreased less, producing lesser increase in SV and EF in the control group. Qualitative evaluation of thallium scans showed apparent perfusion defects with normal redistribution in six myocardial segments in five long-distance runners. Quantitative evaluation demonstrated initial defects, which persisted on delay scans, but were associated with normal relative redistribution in three ventricular walls in three long-distance runners. In conclusion, left ventricular reserve function was greater in long-distance runners than in control subjects. Endurance exercise can be associated with apparent myocardial perfusion defects, which may be due to uneven ventricular hypertrophy resulting from the pressure and volume loads imposed by exercise.

• Research Organization: Department of Radiology, Milton S. Hershey Medical Center, Hershey, PA
• OSTI ID: 6741242
• Journal Information: Am. Heart J.; (United States), Journal Name: Am. Heart J.; (United States) Vol. 108:2; ISSN AHJOA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BODY
CARDIOVASCULAR SYSTEM
COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
DYNAMIC FUNCTION STUDIES
EXERCISE
HEART
ISOTOPES
MAMMALS
MAN
ORGANS
PERFUSED ORGANS
PRIMATES
RADIOISOTOPE SCANNING
SCINTISCANNING
THALLIUM ISOTOPES
VERTEBRATES