Measuring shortness of breath in heart failure (SOB-HF): development and validation of a new dyspnoea assessment tool

Abstract

Aim: To validate a previously developed instrument for measurement of breathlessness in patients with acute heart failure (HF).

Methods and results: We tested descriptors of breathlessness among 190 patients seeking care at the emergency department (ED) for acute shortness of breath. Out of 115 patients with confirmed HF, 107 (94%) had dyspnoea as their main symptom. There were no significant differences between those patients with HF and those who were not diagnosed as heart failure (NHF) (n = 75) in the descriptors of breathlessness, although patients with HF scored significantly (P = 0.03) higher on a visual analogue scale (VAS). In addition, they had significantly (P = 0.03) higher breathing frequency than NHF patients and they were significantly (P < 0.001) more likely to be treated with >40 mg furosemide.

Conclusion: Assessment of acute dyspnoea using a VAS is useful in distinguishing HF from NHF, and may be a more valid approach as compared with using descriptors of intensity of breathlessness in the acute setting.