Intracoronary electrocardiogram for early detection of myocardial viability during coronary angioplasty in acute myocardial infarction

Transcoronary pacing to assess myocardial viability prior to percutaneous coronary intervention: Pilot study to assess feasibility

“…The concept of TCP was introduced more than 30 years ago . Since then, studies have focussed on the use of icECG in the detection of myocardial ischemia and predicting recovery following myocardial infarction. A trial by Petrucci et al has also shown that the amplitude of icECG can discriminate between viable and nonviable left ventricular segments .…”

ST‐segment elevation on intracoronary electrocardiogram after percutaneous coronary intervention is associated with worse outcome in patients with non‐ST‐segment elevation myocardial infarction

“…Previous studies have used IC‐ECG to assess myocardial damage after PCI , but there has been no published data correlating myocardial damage with a ST‐segment change detected by IC‐ECG after PCI in patients with NSTEMI. Uetani et al reported on the relationship between periprocedural myocardial damage and IC‐ECG STE after elective PCI in patients with stable angina pectoris .…”

“…Intracoronary ECG (IC‐ECG) recording, with a guidewire functioning as a unipolar electrode, has been shown to be more sensitive and reliable for detecting regional myocardial ischemia during coronary intervention than a standard surface ECG . IC‐ECG can be used to gauge myocardial viability in acute myocardial infarction ; ST‐segment elevation in the IC‐ECG after PCI has been reported to reflect local myocardial injury . Thus, we hypothesized that ST‐segment elevation after PCI, seen in the IC‐ECG, reflected local myocardial injury in NSTEMI patients, and that it might provide important information to improve risk stratification in patients with a high risk of adverse cardiac events.…”

Intracoronary ECG ST‐segment recovery during primary percutaneous intervention for ST‐segment myocardial infarction: Insights from a cardiac MRI study

“…In addition, Ferrari et al described the usefulness of IC‐ECG in detecting myocardial viability as assessed by single‐photon emission computed tomography (SPECT) by using a definition of >2 mm of ST‐segment elevation from baseline [17]. Yajima et al utilized the same cut off value in describing the utility of IC‐ECG to predict myocardial viability assessed by SPECT during primary‐PCI [18]. Uetani et al recently defined persistent ST‐segment elevation upon the IC‐ECG as an ischemic injury that predicted myocardial injury following elective PCI [19].…”