Cardiac Ischemia and Reperfusion

Cardiac ischemia occurs when blood flow to the heart muscle is interrupted, and while restoring that flow is essential for survival, the return of oxygenated blood paradoxically triggers a second wave of cellular damage known as ischemia-reperfusion injury. Much of the harm arises from a surge of reactive oxygen species and the abrupt opening of the mitochondrial permeability transition pore, both of which destabilize cell membranes and drive cardiomyocyte death in the critical minutes after reperfusion. Researchers have found that brief, controlled episodes of ischemia applied to the heart or even to a distant limb before or during a cardiac event — a strategy called ischemic or remote ischemic conditioning — can substantially limit this injury, though translating these protective effects reliably into clinical outcomes remains an active challenge. Current work is focused on pinpointing the precise signaling cascades that mediate cardioprotection, with the goal of identifying drug targets that can mimic conditioning without requiring physical intervention.

Works

62,161

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1,208,595

Keywords

Ischemia-Reperfusion InjuryCardioprotectionMitochondrial Permeability Transition PoreOxidative StressIschemic PreconditioningRemote Ischemic Conditioning