RESUMO
We present a new method to describe the dynamics of the beat-to-beat RR time series. The classification of the phase-space plots obtained from RR time series is performed by a calculation of parameters which describe the features of the two-dimensional plot. We demonstrate that every parameter has its specific consequence on the evaluation of the state of the cardiac function. By applying the method to the DIAMOND MI study we demonstrate that these parameters have more prognostic power than previously suggested risk markers. The results suggest that the RR intervals constitute a highly complex time series which necessitates the use of refined mathematical-statistical methods in order to reveal pathologies in the heart rate.
Assuntos
Frequência Cardíaca , Infarto do Miocárdio/tratamento farmacológico , Fenetilaminas/uso terapêutico , Ensaios Clínicos Controlados Aleatórios como Assunto/métodos , Sulfonamidas/uso terapêutico , Método Duplo-Cego , Eletrocardiografia , Humanos , Infarto do Miocárdio/fisiopatologia , Estatística como AssuntoRESUMO
Two cases of medial orbital fracture with medial rectus muscle entrapment are reported, one a bona fide blowout fracture. Review of the literature reveals six previous cases. Clinically, patients complain of diplopia with lateral gaze and forced duction tests confirm medial rectus entrapment. Radiographic confirmation is best obtained with hypocycloidal tomography. Surgical therapy is indicated for diplopia or enophthalmus.