# Chaotic breathing in post-COVID-19 breathlessness: a key feature of dysfunctional breathing can be characterised objectively by approximate entropy

> Research article (ERJ Open Research, 2023) · cited 15× · AI/ML

**Wikidata**: [openalex:W4380785189](https://www.wikidata.org/wiki/openalex:W4380785189)  
**Source**: https://4ort.xyz/entity/chaotic-breathing-in-post-covid-19-breathlessness-a-key-feature-of-dysfunctional-breathing-can-be-characterised-objectiv