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High prevalence of silent brain infarction in patients presenting with mechanical heart valve thrombosis

Parag Barwad1, Amol Raheja, Raghunandan Venkat

  • 1Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India.

American Journal of Cardiovascular Drugs : Drugs, Devices, and Other Interventions
|July 12, 2012
PubMed

Insights

Silent brain infarction (SBI) affects 37.5% of patients with mechanical heart valves, often linked to poor anticoagulation. Atrial fibrillation significantly increases SBI risk, highlighting the need for better anticoagulation management.

Area of Science:

  • Cardiology
  • Neurology
  • Vascular Medicine

Background:

  • Mechanical heart valves (MHVs) are associated with a high risk of thromboembolic events, including stroke.
  • Suboptimal anticoagulation is a significant risk factor for adverse events in MHV patients.
  • Silent brain infarction (SBI) is an underrecognized complication in this population.

Purpose of the Study:

  • To determine the prevalence of silent brain infarction (SBI) in patients with mechanical heart valves.
  • To identify baseline characteristics associated with SBI in this cohort.

Main Methods:

  • Post hoc analysis of a randomized controlled trial involving patients with prosthetic valve thrombosis.
  • Utilized pre-treatment computed tomography (CT) brain scans to assess for SBI.
  • Logistic regression analysis was employed to identify predictors of SBI.

Main Results:

  • SBI was present in 37.5% of patients (27 of 72).
  • A majority of patients with SBI (82.6%) had sub-therapeutic anticoagulation levels.
  • Atrial fibrillation (AF) was strongly associated with SBI (OR 5.60, p=0.02).

Conclusions:

  • The high prevalence of SBI in young MHV patients is concerning.
  • Improved anticoagulation quality is crucial for preventing SBI in this population.
  • Early identification and management of risk factors like AF are essential.
Abstract

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