Mechanism of heart failure after myocardial infarction
Huaiyu Jiang1, Tingting Fang2, Zeyi Cheng1
1Department of Cardiovascular Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Insights
New strategies are needed to prevent heart failure (HF) after myocardial infarction (MI), as current treatments show limited success. Understanding the complex mechanisms of adverse ventricular remodeling is key to developing effective therapies for HF post-MI.
Area of Science:
- Cardiology
- Pathophysiology
- Translational Medicine
Background:
- Current treatments for heart failure (HF) following myocardial infarction (MI) have limited efficacy.
- Adverse ventricular remodeling is a critical factor in HF development post-MI.
- Understanding underlying mechanisms is crucial for novel therapeutic development.
Purpose of the Study:
- To review the pathophysiological mechanisms driving HF post-MI.
- To highlight sex-related differences in acute MI prognosis.
- To inform the development of targeted treatments for HF post-MI.
Main Methods:
- Literature review focused on HF pathophysiology after MI.
- Analysis of factors contributing to adverse ventricular remodeling.
- Examination of sex-specific outcomes in acute MI.
Main Results:
- HF post-MI involves complex processes, notably adverse ventricular remodeling.
- Factors include mechanical stress, neurohormonal imbalance, inflammation, ischemia/reperfusion, metabolism, and genetics.
- Right ventricular dysfunction can occur post-MI.
Conclusions:
- Existing therapies for HF post-MI require augmentation.
- Further research into pathophysiological mechanisms and sex differences is warranted.
- Targeted therapies informed by these insights may improve outcomes for HF patients post-MI.
Abstract:
Despite the widespread use of early revascularization and drugs to regulate the neuroendocrine system, the impact of such measures on alleviating the development of heart failure (HF) after myocardial infarction (MI) remains limited. Therefore, it is important to discuss the development of new therapeutic strategies to prevent or reverse HF after MI. This requires a better understanding of the potential mechanisms involved. HF after MI is the result of complex pathophysiological processes, with adverse ventricular remodeling playing a major role. Adverse ventricular remodeling refers to the heart's adaptation in terms of changes in ventricular size, shape, and function under the influence of various regulatory factors, including the mechanical, neurohormonal, and cardiac inflammatory immune environments; ischemia/reperfusion injury; energy metabolism; and genetic correlation factors. Additionally, unique right ventricular dysfunction can occur secondary to ischemic shock in the surviving myocardium. HF after MI may also be influenced by other factors. This review summarizes the main pathophysiological mechanisms of HF after MI and highlights sex-related differences in the prognosis of patients with acute MI. These findings provide new insights for guiding the development of targeted treatments to delay the progression of HF after MI and offering incremental benefits to existing therapies.
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