Ventricular Dysfunction and Heart Failure

Definition and Classification

• The American College of Cardiology defines heart failure as a complex clinical syndrome characterized by specific symptoms and signs resulting from a structural or functional cardiac abnormality that impairs the ventricle's ability to fill or eject blood 1, 2
• The American College of Cardiology describes ventricular dysfunction as a structural or functional abnormality of the ventricle that can be present without clinical manifestations of heart failure 3, 4

Relationship Between Ventricular Dysfunction and Heart Failure

• Ventricular dysfunction is often a precursor to heart failure and represents an early stage in the evolution of the disease 5
• According to the ACC/AHA classification, asymptomatic ventricular dysfunction corresponds to stage B of heart failure (structural cardiac abnormality without signs or symptoms of heart failure) 4
• Symptomatic heart failure corresponds to stage C (structural abnormality with present or prior symptoms) 4

Progression of Ventricular Dysfunction to Heart Failure

• Ventricular dysfunction typically begins with myocardial injury and progresses gradually, even in the absence of a new identifiable insult 3
• Cardiac remodeling is the main manifestation of this progression, with changes in the geometry and structure of the left ventricle 4
• This remodeling process usually precedes the onset of symptoms, sometimes by several months or years 3, 5
• Not all patients with ventricular dysfunction will necessarily develop symptomatic heart failure 2

Clinical Implications

• Early detection of ventricular dysfunction is crucial because treatments at this stage can reduce morbidity and mortality 6
• The American College of Cardiology recommends that patients with ventricular dysfunction be closely monitored and treated to prevent progression to heart failure 1, 2
• Heart failure always involves underlying ventricular dysfunction, whether systolic or diastolic 7