Pharmacologic alterations in Tc-99m binding by red blood cells: concise communication
The effect of two antihypertensive agents (captopril and prazosin) and of digoxin on the efficiency of Tc-99m binding to RBCs was evaluated in the rat. RBCs were labeled with Tc-99m in vivo in six groups of rats: I-normotensive controls Wistar rat (WR), II-prazosin treated WR, III-spontaneously hypertensive rat (SHR), IV-prazosin-treated SHR, V-digoxin-treated WR, and VI-captopril-treated WR. The percentage of intravascular Tc-99m bound to RBC (%T) and the percentage of injected dose remaining intravascular 5 min after injection (%i.v.) were determined. Mean %T was 94.2, 83.8, 94.9, 86.1, 79.7, and 93.3 for groups I-VI respectively. Mean %I.V. was 96.4, 74.6, 94.9, 79.0, 74.4, and 87.4 for groups I-VI respectively. The findings demonstrate a significant reduction of RBC tagging with Tc-99m in rats treated with prazosin and digoxin but not with captopril. The data suggest a potential interference by patient medication with the performance of blood-pool studies.
- Research Organization:
- Dept. of Nucl. Med., Hospital of the Albert Einstein College of Medicine, Bronx, NY
- OSTI ID:
- 5899045
- Journal Information:
- J. Nucl. Med.; (United States), Vol. 24:5
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of calcium entry blockers on blood pressure and vasoconstrictor responses to alpha-1 adrenoceptor stimulation in conscious spontaneously hypertensive rats
Differential effect of captopril on GFR in rats with renovascular hypertension
Related Subjects
ERYTHROCYTES
LABELLING
TECHNETIUM 99
CHEMICAL BONDS
ANTIHYPERTENSIVE AGENTS
DIGOXIN
ISOMERIC NUCLEI
RATS
RESPONSE MODIFYING FACTORS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY FLUIDS
CARBOHYDRATES
CARDIAC GLYCOSIDES
CARDIOTONICS
CARDIOVASCULAR AGENTS
DIGITALIS GLYCOSIDES
DRUGS
GLYCOSIDES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAMMALS
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
RADIOISOTOPES
RODENTS
TECHNETIUM ISOTOPES
VERTEBRATES
YEARS LIVING RADIOISOTOPES
550601* - Medicine- Unsealed Radionuclides in Diagnostics