AI Article Synopsis
- Heart rate turbulence (HRT) is influenced by the baroreceptor reflex and may indicate autonomic dysfunction, particularly after myocardial infarction, though its role in chronic heart failure (CHF) is less clear.
- The study analyzed 64 CHF patients, measuring HRT parameters (turbulence onset and turbulence slope) alongside uric acid and brain natriuretic peptide levels, and followed up over 6 and 12 months.
- Results revealed that CHF patients had significantly worse HRT parameters compared to healthy controls, with correlations found between HRT metrics, NYHA class, and biochemical markers, suggesting that HRT could serve as a valuable prognostic tool in CHF management.
Article Abstract
Background: Heart rate turbulence (HRT) is modulated by the baroreceptor reflex, and it has been suggested that it could be used as a measure of autonomic dysfunction. Impaired HRT has a significant prognostic value in patients after myocardial infarction. The usefulness of HRT parameters in CHF patients has not yet been well established.
Aim: To assess the relationship between HRT parameters, clinical course of CHF and selected biochemical markers with respect to their prognostic value in CHF patients.
Methods: A 64 of 100 consecutive CHF patients, in whom it was possible to calculate HRT, were divided into four groups according to NYHA class. Uric acid (UA) and brain natriuretic peptide (BNP) concentrations were measured. Heart rate turbulence was analysed from 24-hour Holter ECG and characterised by two parameters: turbulence onset (TO) and turbulence slope (TS). The results of 20 healthy persons served as a control group. Follow-up examinations were performed after 6 and 12 months.
Results: In patients with CHF both HRT parameters (TO and TS) were significantly impaired in comparison to TO and TS in healthy subjects. A negative correlation between these parameters was found. A strong positive correlation between TO and NYHA class and a significant negative correlation between TS and BNP and UA concentrations were observed. There were 11 deaths during one-year follow-up. Patients who died due to CHF had significantly lower TS and higher TO values in comparison to survivors.
Conclusions: Heart rate turbulence is impaired in CHF patients. HRT parameters show a significant correlation with some clinical factors: NYHA class, BNP and UA concentrations. Both HRT parameters, TO and TS, seem to be significant prognostic markers in patients with CHF.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!