Thallium-201 myocardial perfusion scintigrams in the evaluation of aorto-coronary saphenous bypass surgery

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · J. Nucl. Med.; (United States)

OSTI ID:7053607

Verani, M S; Marcus, M L; Spoto, G; Rossi, N P; Ehrhardt, J C; Razzak, M A

The effect of aorto-coronary bypass graft surgery (CBG) upon regional myocardial perfusion (RMP) was studied in 23 patients using thallium-201 myocardial perfusing imaging after exercise. We compared the changes in RMP with the clinical status and ECG's during graded treadmill exercise (GTX) before and after CBG. After CBG, the New York Heart Association's functional class improved from 3.2 +- 0.1 (mean +- SE) to 1.2 +- 0.2, p < 0.005. The GTX performance of the patients was also significantly improved postoperatively as judged by the total exercise time (11.7 +- 0.6 min postop, compared with 7.2 +- 0.5 min preop; p < 0.005). Postoperative improved Tl-201 scintigrams were observed in 19 patients, but in only nine patients did the perfusion distribution return to normal. Thus, Tl-201 exercise scintigrams following CBG demonstrate improved RMP in most patients. Failure of regional myocardial perfusion to improve postoperatively, however, does not preclude marked alleviation of angina and improved exercise tolerance.

• Research Organization: Univ. of Iowa, Iowa City
• OSTI ID: 7053607
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 19:7; ISSN JNMEA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
ARTERIES
BETA DECAY RADIOISOTOPES
BLOOD FLOW
BLOOD VESSELS
BODY
CARDIOVASCULAR DISEASES
CARDIOVASCULAR SYSTEM
CORONARIES
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
DIAGRAMS
DISEASES
ELECTROCARDIOGRAMS
ELECTRON CAPTURE RADIOISOTOPES
EVALUATION
EXERCISE
GRAFTS
HEART
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEASURING METHODS
MEDICINE
MUSCLES
MYOCARDIUM
NUCLEI
ODD-EVEN NUCLEI
ORGANS
PATIENTS
RADIOISOTOPE SCANNING
RADIOISOTOPES
SCINTISCANNING
SECONDS LIVING RADIOISOTOPES
SURGERY
THALLIUM 201
THALLIUM ISOTOPES
TRANSPLANTS