ABSTRACT
Twelve patients with exertional angina underwent exercise treadmill testing, exercise equilibrium blood pool scintigraphy (Ex EBPS). Dipyridamole equilibrium blood pool scintigraphy (Dip EBPS) and coronary angiography by the Judkin's technique. Dipyridamole was infused through a venous cannula placed in the antecubital vein, in a dose of 0.56 mg/kg over four minutes. Four patients had single vessel disease, three double vessel disease, four triple vessel disease, and one had normal coronary arteries. Exercise equilibrium blood pool scintigraphy was found to have a sensitivity of 81%, and a positive predictive value for significant coronary artery disease of 100%. Dipyridamole EBPS had a sensitivity of 72% with a positive predictive value of 100%. The occurrence of regional wall motion abnormalities, following dipyridamole infusion, occurs up to fifteen minutes after exercise, and, therefore, serial acquisition for up to 20 minutes after the infusion is recommended. In patients with angina, who are unable to exercise because of orthopaedic disabilities or peripheral vascular disease, dipyridamole stress blood pool scintigraphy is a feasible alternative.
Subject(s)
Adult , Dipyridamole/diagnosis , Exercise Test , Humans , Male , Middle AgedABSTRACT
Os testes de sensibilidade aos antibióticos na rotina laboratorial oferecem resultados em 18-24 horas após o isolamento do microrganismo. Procurou-se um artifício de técnica, objetivando uma leitura precoce no método do disco. Várias leituras de medicaçäo do halo foram feitas em funçäo do tempo de incubaçäo das placas, utilizando-se o meio de cultura sem e com cloreto de 2,3 5-trifenilterazólio (TTC) em diversas concentraçöes . Os halos medidos em tempo precoce näo foram diferentes dos de 24 horas e a viragem do indicador para vermelho deu maior nitidez aos halos, numa concentraçäo de 0,01%. A técnica apresenta a vantagen de precocidade dos resultados, principalmente em se tratando de amostras bacterianas hospitalares