Primary Intrinsic Cardiac Conditions The most frequent etiological category involves direct damage to the sinus node or atrioventricular (AV) conduction system. Iatrogenic and Pharmacological Triggers Medical intervention frequently unmasks latent ventricular automaticity.
Idioventricular Rhythm Causes During Surgery: Understanding Intraoperative Triggers
Chronic Structural Remodeling Long-standing cardiac pathology replaces healthy myocardium with fibrotic and fatty tissue, creating a substrate for persistent ventricular rhythm disorders. Age-related fibrosis of the sinus node, known as sick sinus syndrome, or calcification of the AV node represents a gradual failure of the conduction system.
Metabolic and Inflammatory Insults Systemic derangements significantly lower the threshold for ventricular automaticity. Reperfusion following thrombolysis or percutaneous intervention often restores sinus rhythm, indicating the idioventricular rhythm was a transient protective mechanism.
Idioventricular Rhythm Causes During Surgery: Iatrogenic Triggers and Intraoperative Factors
Severe electrolyte imbalances, specifically hyperkalemia, slow conduction and depress SA node function. Ischemic heart disease, particularly acute myocardial infarction affecting the right coronary artery, can disrupt the sinus node blood supply.
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