Corrected thrombolysis in myocardial infarction frame count and ejection fraction in patients undergoing primary percutaneous coronary intervention for myocardial infarction

Background: this study aimed to assess the associations between corrected thrombolysis in myocardial infarction frame count (ctfc) of the infarct-related artery (ira) and ejection fraction (ef) after three-six months in patients who underwent primary percutaneous coronary intervention (ppci) for st segment elevation myocardial infarction (stemi). methods: ctfc was determined by a digital system for 78 patients. ef was measured through simpson’s method upon discharge and three-six months later. the subjects were divided into two groups of ctfc ≤ 20 (n = 54) and ctfc > 20 (n = 24). association between ctfc and ef were then specified. results: ctfc ≤ 20 and ctfc > 20 were present in 69.2% and 30.8% of the patients, respectively. there was no significant difference between the two groups regarding baseline characteristics. ef at the time of discharge was 42.1% ± 10.2% and 43.5% ± 11.4% in groups with ctfc ≤ 20 and > 20, respectively. there was no significant association between ef at discharge and ctfc (p = 0.611). after three months, ef changed to 49.6% ± 8.7% and 41.6 ± 12.4% in the groups with ctfc ≤ 20 and ctfc > 20, respectively. three months after ppci, ef and ctfc had a significant relation (p = 0.007). cumulative number and percentage of shock and death were 3 (3.8%) and 2 (2.6%), respectively. conclusion: lower ctfc of the infarct-related artery in patients undergoing ppci for stemi was associated with higher left ventricular ejection fraction after three months.