Value of frontal QRS axis for risk stratification of individuals with prolonged PR interval.
Ann Noninvasive Electrocardiol
; 28(4): e13066, 2023 07.
Article
em En
| MEDLINE
| ID: mdl-37243938
ABSTRACT
BACKGROUND:
There is ongoing controversy regarding the prognostic value of PR prolongation among individuals free of cardiovascular diseases. It is necessary to risk-stratify this population according to other electrocardiographic parameters.METHODS:
This study is based on the Third National Health and Nutrition Examination Survey. Cox proportional hazard models were constructed and Kaplan-Meier method was used.RESULTS:
A total of 6188 participants (58.1 ± 13.1 years; 55% women) were included. The median frontal QRS axis of the entire study population was 37° (IQR 11-60°). PR prolongation was present in 7.6% of the participants, of whom 61.2% had QRS axis ≤37°. In a multivariable-adjusted model, mortality risk was highest in the group with concomitant prolonged PR interval and QRS axis ≤37° (hazard ratio [HR] 1.20; 95% confidence interval [CI] 1.04-1.39). In models with similar adjustment where population were reclassified depending on PR prolongation and QRS axis, prolonged PR interval and QRS axis ≤37° was still associated with increased risk of mortality (HR 1.18; 95% CI 1.03-1.36) compared with normal PR interval.CONCLUSIONS:
QRS axis is an important factor for risk stratification in population with PR prolongation. The extent to which this population with PR prolongation and QRS axis ≤37° is at higher risk of death compared with the population without PR prolongation.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eletrocardiografia
/
Bloqueio Atrioventricular
Tipo de estudo:
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
Ann Noninvasive Electrocardiol
Assunto da revista:
CARDIOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
China