Intracoronary ECG May Reveal Dynamic Changes in Tissue-Level Reperfusion During Primary PCI.

Area of Science:

• Cardiology
• Medical Imaging
• Interventional Cardiology

Background:

• Intracoronary electrocardiogram (IC-ECG) monitoring during percutaneous coronary intervention (PCI) shows variable ST-segment behavior post-stent deployment.
• These ST-segment patterns correlate with distinct myocardial infarct characteristics observed via cardiac magnetic resonance imaging (CMR).

Purpose of the Study:

• To compare IC-ECG findings during PCI with CMR-defined infarct characteristics.
• To explore the potential of IC-ECG as a real-time indicator of myocardial reperfusion.

Main Methods:

• Fifteen patients with anterior myocardial infarction underwent IC-ECG monitoring during primary PCI.
• Guidewire-based IC-ECG data were collected and correlated with cardiac magnetic resonance imaging results.

Main Results:

• Dynamic ST-segment changes were observed during sequential steps of primary PCI using IC-ECG.
• These dynamic changes suggest potential microvascular reperfusion impairment.

Conclusions:

• IC-ECG recordings during PCI may reflect dynamic ST-segment alterations indicative of microvascular dysfunction.
• Further research is warranted to establish IC-ECG as a reliable real-time marker for myocardial reperfusion assessment during PCI.