Īlthough pre-procedural TIMI flow is recognized to be a reliable predictor of cardiac mortality in patients with STEMI, the prognostic value of STR preceding primary PCI is still not well established. It was demonstrated that STR after PCI was a strong and independent predictor of cardiac mortality and recurrence of myocardial infarction (MI) across all spectra of clinical risk, and a lack of STR was even of prognostic value 6 years after the occurrence of AMI. A quick estimation of maximal ST resolution (STR) as a surrogate marker of blood flow provides similar results to analysis of the sum of STR in all leads. ST-segment changes may be evaluated either as the sum of ST-segment deviations in all leads in a given infarction area or in the single lead with the largest ST deviation.
#Exertion timi flow 3 series
The most common non-invasive method for evaluating reperfusion is to analyze the resolution of ischemic ST-segment changes in a series of ECG records. In an analysis of randomized trials, pre-procedural TIMI-3 flow was a more powerful prognostic predictor than TIMI-3 flow after angioplasty, underscoring the importance of early flow restoration in patients with STEMI. Post-procedural TIMI flow of the IRA is used for risk stratification of patients with STEMI, but pre-procedural TIMI flow may also be an important predictor of clinical prognosis. Thrombolysis in myocardial infarction (TIMI) flow grade estimates epicardial flow by evaluating the flow of contrast material in epicardial coronary arteries during angiography. Reperfusion of the infarct-related artery (IRA) is a critical predictor of prognosis in patients with acute myocardial infarction (AMI) and may be evaluated either angiographically or non-invasively. ConclusionsĪssessment of STR could potentially be used to stratify risk in patients with STEMI before PCI. STR was classified as total (≥70% group I), partial (≥30 and 70% may predict a better clinical outcome. Standard 12-lead ECG tracings were recorded at first medical contact, immediately prior to arterial puncture and 60 min after PCI. Patients with STEMI undergoing primary PCI were recruited. We investigated whether pre-angiography STR predicted spontaneous IRA reperfusion in STEMI patients. ST resolution (STR) after AMI is a non-invasive indicator of IRA reperfusion.
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