[Diagnosis using nuclear medicine of anterior descending artery stenosis in patients with left bundle branch block].
OBJECTIVE
To evaluate septal perfusion and contractility in patients with left bundle branch block (LBBB).


METHODS
Twenty patients were submitted to myocardial scintigraphy with Tecnecium-99m isontrile after exercise and dipyridamole infusion. The septal contractility was observed during the radionuclide ventriculography. All patients were submitted to coronariography.


RESULTS
Twenty patients were studied and 17 (85%) had a normal left anterior descending (LAD) artery. Nine (53%) patients had abnormalities in septal perfusion after the exercise and 2 (12%) after dipyridamole infusion. All patients had abnormalities in septal contractility during the radionuclide ventriculography.


CONCLUSIONS
The myocardial scintigraphy after dipyridamole infusion showed better specificity in the diagnosis of a LAD lesion. The radionuclide ventriculography was an efficient method to evaluate the septal contraction abnormalities in patients with LBBB.
Smanio
P E
PE
Instituto Dante Pazzanese de Cardiologia, São Paulo.
Martins
L R
LR
Tazima
S
S
Meneghelo
R
R
Thom
A
A
Sousa
J E
JE
D002037:Bundle-Branch Block / Q000150:complications / Q000000981:diagnostic imaging*; D003327:Coronary Disease / Q000150:complications / Q000000981:diagnostic imaging*; D004176:Dipyridamole; D006346:Heart Septum / Q000000981:diagnostic imaging; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D015635:Radionuclide Ventriculography; D019275:Radiopharmaceuticals; D017256:Technetium Tc 99m Sestamibi
D019275:Radiopharmaceuticals; D004176:Dipyridamole; D017256:Technetium Tc 99m Sestamibi
Diagnóstico de lesão obstrutiva da artéria coronária descendente anterior em pacientes com bloqueio de ramo esquerdo através da medicina nuclear.