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Updated: Aug 29, 2026

Myocardial Infarction and Functional Outcome Assessment in Pigs
Published on: April 25, 2014
[Mid- to long-term effects of delayed percutaneous coronary intervention on left ventricular function and prognosis
Xiao-ming Huang1, Zhen-yao Pang, Qian-ying Huang
1Department of Cardiology, Second People's Hospital of Gulin, Gulin 541001, China.
Insights
Delayed percutaneous coronary intervention (PCI) significantly improves left ventricular function and patient outcomes after acute myocardial infarction (AMI). This approach reduces mortality and reinfarction rates, offering a better prognosis.
Area of Science:
- Cardiology
- Interventional Cardiology
Context:
- Acute myocardial infarction (AMI) poses significant risks to cardiac function and patient survival.
- Timely intervention is crucial, but the optimal timing for revascularization remains an area of investigation.
Purpose:
- To evaluate the mid- to long-term impact of delayed percutaneous coronary intervention (PCI) on left ventricular function and clinical outcomes in patients with AMI.
Summary:
- A study compared 42 patients undergoing delayed PCI (1-2 weeks post-AMI) with 31 controls receiving medication only.
- Left ventricular function showed significant improvement in the PCI group at 1 and 6 months post-AMI (P<0.01).
- The PCI group experienced no deaths or reinfarctions, with only one case of angina, contrasting with the control group's outcomes.
Impact:
- Delayed PCI demonstrates a high success rate, significantly improving prognosis and prolonging survival free from cardiovascular events.
- This strategy effectively ameliorates left ventricular function post-AMI.
Objective:
To investigate the mid- to long-term effects of delayed percutaneous coronary intervention (PCI) on the left ventricular function and clinical outcome of patients with acute myocardial infarction (AMI).
Methods:
PCI (including percutaneous transluminal coronary angioplasty and stenting) was performed in 42 patients within 1 to 2 weeks following the onset of AMI (PCI group), with another 31 patients who were admitted within the same period to receive medication for AMI serving as the control group. The patients in both groups were observed for comparison of the occurrence of reinfarction and angina, mortality at 1 and 6 months, and findings by ultrasound cardiograms (UCG).
Results:
In PCI group, the left ventricular function were obviously improved as compared with the control group (P<0.01) 1 month after the onset of AMI, showing greater improvement at 6 months (P<0.01). No death or reinfarction occurred in the PCI group, with only 1 patients experiencing angina 5 months after PCI. In control group, death occurred in 2 cases, reinfarction in 1 case, recurrent angina in 4 cases (include 2 cases of early postinfarction angina).
Conclusion:
Delayed PCI may significantly improve the prognosis of patients with AMI and prolong their survival without cardiovascular accidents and ameliorate their left ventricular functions, with high success rate of the operation.
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