Abstract

PONCE VICENTE, Felizardo et al. Empleo del dipiridamol en la gammagrafía de miocardio con tetrofosmín-Tc99m en pacientes con bloqueo completo de rama izquierda: Resultados preliminares. Rev cubana med [online]. 2002, vol.41, n.5, pp.251-255. ISSN 0034-7523.

The partial results of the administration of endovenous dipyridamole are compared with physical effort in 7 patients with complete left bundle branch block (CLBB) during myocardial scintigraphy with Tetrofosmin-TC99m. Exercise was undertaken according to the habitual protocol of our laboratory. The following segments were analyzed: septum, apex, inferoapical, posterolateral, anterolateral, anterior, inferior, postero-inferior and postero-basal. The highest heart rate (HR) on exertion was 90 ±8 % and the maximum load was 61± 24 W. Heart rate, systolic and diastolic blood pressure under basal conditions had no significant changes, but when the stresses were compared they did (p<0.05). The global concordance for the reversibility or not of the uptake defect of the radiopharmaceutical was 96 %, k=0.83, whereas for identifying the type of defect it was 92 %, k=0.84. The worst concordance was for the septum 85 %, k=0.80; however, it was not significant in relation to other analyzed segments. Congruency was 71 % in the diagnostic result. Due probably to the unsuitability of the sample of studied patients, our results show a good concordance between the use of dipyridamole and physical effort with stress methods when only the images obtained are evaluated.

Keywords : DIPYRIDAMOLE [diagnostic use]; EXERCISE; BUNDLE-BRANCH BLOCK [diagnosis]; MYOCARDIAL ISCHEMIA [diagnosis]; MYOCARDIAL REPERFUSION; INJECTIONS, INTRAVENOUS; HEART [radionuclide imaging]; ERGOMETRY.