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Figure 1 | Critical Care

Figure 1

From: Do heart and respiratory rate variability improve prediction of extubation outcomes in critically ill patients?

Figure 1

Flow diagram of selection of patients. Beside standard exclusions due to protocol and technical violations, the diagram shows how the dataset was reduced to ensure proper variability computation. In particular, patients were excluded when (1) having less than two windows of both heart rate and respiratory rate variability to analyze prior and during the spontaneous breathing trial, and (2) variability was extracted from waveforms deemed to be poor quality.

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