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Sustained ventricular arrhythmias in unstable angina patients: results of the ARIAM database

Manuel Ruiz-Bailén1, María Dolores Pola Gallego de Guzmán, Luis Rucabado-Aguilar

  • 1Department of Critical Care and Emergency, Intensive Care Unit, Hospital Universitario Médico-Quirúrgico del Complejo Hospitalario de Jaén, Spain. mrb1604@terra.es

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
|May 30, 2009
PubMed

Insights

This study on unstable angina (UA) found sustained ventricular tachycardia (SVT) and ventricular fibrillation (VF) are associated with increased mortality and length of stay. These arrhythmias identify a high-risk subgroup of UA patients.

Area of Science:

  • Cardiology
  • Clinical Medicine
  • Public Health

Background:

  • Unstable angina (UA) is a critical condition requiring investigation into associated complications.
  • Arrhythmias, specifically sustained ventricular tachycardia (SVT) and ventricular fibrillation (VF), are significant concerns in UA patients.
  • Understanding predictive factors for these arrhythmias is crucial for patient management.

Purpose of the Study:

  • To investigate predictive factors for arrhythmias in unstable angina (UA) patients.
  • To determine if arrhythmias are independent predictors of mortality, prolonged ICU/CCU stay, and percutaneous coronary intervention (PCI) rates.
  • To identify high-risk subgroups within the UA patient population.

Main Methods:

  • A retrospective cohort study utilizing the Spanish "ARIAM" database.
  • Inclusion of 17,616 patients diagnosed with UA between June 1996 and December 2005.
  • Application of univariate and multivariate analyses to identify associated factors and independent predictors.

Main Results:

  • Sustained ventricular tachycardia (SVT) occurred in 0.5% of patients, associated with age, cardiogenic shock, and non-sustained VT. SVT independently predicted mortality.
  • Ventricular fibrillation (VF) occurred in 1% of patients, independently associated with gender, Killip class, and high-degree atrioventricular block (HDAVB).
  • VF was linked to higher mortality but was not an independent predictor; however, it independently predicted increased length of stay. Neither SVT nor VF were independent predictors for PCI.

Conclusions:

  • Patients with UA experiencing SVT or VF represent a distinct high-risk subgroup.
  • These arrhythmias are associated with a poor prognosis in unstable angina.
  • Stratification of UA patients based on the occurrence of SVT or VF can identify those needing closer monitoring and management.
Abstract

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