[Pathophysiology and therapeutic aspects of left ventricular "remodeling" in the post-infarct phase]

Area of Science:

• Cardiology
• Physiology
• Pathology

Context:

• Left ventricular remodeling is a complex process influenced by mechanical, neurohormonal, and genetic factors.
• It can be adaptive during normal growth or pathological in conditions such as myocardial infarction, cardiomyopathy, hypertension, and valvular heart disease.
• Postinfarction remodeling occurs in early (within 72 hours) and late phases, involving infarct expansion, ventricular dilatation, shape distortion, and hypertrophy.

Purpose:

• To describe the mechanisms and phases of left ventricular remodeling.
• To highlight the adaptive responses and triggers involved in myocardial repair.
• To emphasize the role of infarct artery patency and pharmacological interventions in managing remodeling.

Summary:

• Left ventricular remodeling involves changes in size, shape, and function regulated by various factors.
• Early postinfarction remodeling includes infarct expansion, potentially leading to rupture or aneurysm.
• Late remodeling involves global ventricular changes, hypertrophy, and collagen degradation, influenced by infarct artery patency.

Impact:

• Understanding remodeling aids in developing strategies to prevent adverse cardiac events.
• Pharmacological interventions like ACE inhibitors and beta-blockers can minimize adverse remodeling and improve prognosis.
• Targeting infarct artery patency is crucial for managing postinfarction remodeling and cardiac repair.