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Outcomes of patients with Killip class III acute myocardial infarction after primary percutaneous coronary

Tzu-Hsien Tsai1, Sarah Chua, Hisham Hussein

  • 1Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan, Republic of China.

Critical Care Medicine
|January 19, 2011
PubMed

Insights

Patients with Killip class III acute ST-segment elevation myocardial infarction (STEMI) face significantly higher mortality risks, even after primary percutaneous coronary intervention. Killip III status is an independent predictor of both 30-day and 1-year mortality in STEMI patients.

Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Acute Myocardial Infarction Research

Background:

  • Outcomes for patients with Killip class III acute ST-elevation myocardial infarction (STEMI) in the reperfusion era are not well-established.
  • Primary percutaneous coronary intervention (PCI) is a standard treatment for STEMI, but its impact on high-risk patient subgroups requires further investigation.

Purpose of the Study:

  • To investigate the short- and long-term outcomes of patients with Killip class III STEMI who underwent primary PCI.
  • To determine if Killip class III remains an independent predictor of mortality in the current treatment paradigm.

Main Methods:

  • A prospective study of 1,278 consecutive STEMI patients undergoing primary PCI between January 2002 and November 2009.
  • Patients were categorized into Killip class I (n=832), II (n=216), and III (n=230) based on presentation.
  • Outcomes including angiographic findings, in-hospital complications, and 30-day and 1-year mortality were analyzed.

Main Results:

  • Killip III patients had significantly lower final thrombolysis in myocardial infarction (TIMI) 3 flow and higher incidence of multi-vessel disease compared to Killip I and II.
  • The incidence of advanced congestive heart failure during hospitalization was substantially higher in Killip III patients (71.3%).
  • 30-day mortality (20.0%) and 1-year cumulative mortality (31.7%) were significantly higher in Killip III patients, who were independently predicted by this classification.

Conclusions:

  • Killip class III remains a strong and independent predictor of 30-day and 1-year mortality in STEMI patients, despite undergoing primary PCI.
  • These findings highlight the critical need for aggressive management and closer monitoring of STEMI patients presenting with Killip class III.
  • Further research may explore novel therapeutic strategies to improve outcomes in this high-risk population.
Abstract

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