Acute left ventricular dysfunction of severe scorpion envenomation is related to myocardial perfusion disturbance - Cupo, Palmira; Figueiredo, Alexandre Baldini de; P. Filho, Antonio; Pintya, Antonio O.; Tavares Júnior, Gerson A.; Caligaris, Fábio; Marin-Neto, José Antônio; Hering, Sylvia Evelyn; Simões, Marcus Vinícius (International Journal of Cardiology, 2007)