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Updated: Jul 18, 2026

Robotic Ablation of Atrial Fibrillation
Published on: May 29, 2015
[Atrioventricular block in unstable angina. Results of the ARIAM registry]
M Ruiz-Bailén1, M D Pola Gallego, M Expósito Ruiz
1Unidad de Medicina Intensiva, Servicio de Cuidados Críticos y Urgencias, Hospital Universitario Médico Quirúrgico, Complejo Hospitalario de Jaén, Jaén, España. mrb1604@terra.es
Insights
High degree atrioventricular block (HDAVB) occurred in 1% of unstable angina (UA) patients. While not increasing mortality, HDAVB independently prolonged ICU stays, identifying these patients as high-risk.
Area of Science:
- Cardiology
- Critical Care Medicine
- Clinical Research
Background:
- Unstable angina (UA) is a critical condition requiring careful management.
- High degree atrioventricular block (HDAVB) is a potential complication in cardiac patients.
- Understanding the implications of HDAVB in UA is crucial for patient outcomes.
Purpose of the Study:
- To determine the frequency of HDAVB in unstable angina (UA) patients.
- To identify factors associated with HDAVB development in UA.
- To evaluate the independent impact of HDAVB on mortality and ICU length of stay.
Main Methods:
- Retrospective analysis of 14,096 UA patients from the Spanish ARIAM registry (1996-2003).
- Inclusion of data from 129 Spanish ICUs.
- Analysis of variables related to HDAVB development, mortality, and ICU stay.
Main Results:
- HDAVB was present in 1% of UA patients.
- HDAVB was independently linked to Killip classification and ventricular arrhythmias.
- Crude mortality was higher with HDAVB, but this association was not independent.
- HDAVB independently predicted longer ICU stays (aOR 1.89).
Conclusions:
- Unstable angina patients with HDAVB constitute a high-risk group.
- HDAVB is associated with prolonged ICU admission in UA patients.
- Further research may explore specific interventions for this subgroup.
Objective:
Describe the frequency of high degree atrioventricular block (HDAVB) in patients with unstable angina (UA), analyze the variables associated with their appearance and evaluate whether HDAVB is independently associated with increased mortality or increased length of ICU stay.
Design:
Retrospective descriptive study of patients with UA included in the ARIAM registry.
Setting:
ICUs from 129 hospitals in Spain.
Patients:
From June 1996 to December 2003 a total of 14,096 patients were included in the ARIAM registry with a diagnosis of UA.
Main Variables Of Interest:
Variables associated with the development of HDAVB, variables associated with the mortality of patients with UA, variables associated with the length of ICU stay of patients with UA.
Results:
HDAVB frequency was 1%. Development of HDAVB was independently associated with the Killip classification and the presence of sustained ventricular tachycardia or ventricular fibrillation. Crude mortality of patients was significantly increased when HDAVB was present (9% versus 1%, p < 0,001). When adjusted for other variables, HDAVB was not associated with increased mortality. Development of HDAVB in patients with UA was independently associated with an increase in the length of ICU stay (adjusted odds ratio 1.89: 95% confidence interval: 1.33-5.69).
Conclusions:
Patients with UA complicated with HDAVB represent a high-risk population with an increased ICU stay.
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