[The studies of risk factors and early intervention in patients with acute coronary syndromes without ST-segment
Ming-Zhong Zhao1, Da-Yi Hu, Li-Qing Jiang
1Department of Cardiology, People's Hospital, Peking University, Beijing 100044, China.
Insights
Identifying high-risk factors like ST-segment depression and elevated troponin I in acute coronary syndromes without ST-segment elevation is crucial. An early invasive strategy significantly reduces cardiovascular events in these patients.
Area of Science:
- Cardiology
- Internal Medicine
Context:
- Acute coronary syndromes (ACS) without ST-segment elevation represent a significant clinical challenge.
- Understanding risk factors and optimal treatment strategies is vital for improving patient outcomes.
Purpose:
- To identify primary high-risk factors for cardiovascular events in patients with ACS without ST-segment elevation.
- To evaluate the effectiveness of an early invasive strategy versus an early conservative strategy on patient outcomes.
Summary:
- A study involving 545 patients with ACS without ST-segment elevation compared early invasive and conservative strategies.
- Multivariate analysis identified ST-segment depression, elevated troponin I, increased C-reactive protein, lower left ventricular ejection fraction, and higher TIMI risk scores as independent predictors of cardiovascular events.
- The early invasive strategy demonstrated a significant reduction in re-hospital admissions and combined cardiovascular events at 30 days and 6 months compared to the conservative approach.
Impact:
- The findings highlight key risk factors that can guide clinical decision-making for patients with ACS without ST-segment elevation.
- An early invasive strategy offers a substantial benefit in reducing adverse cardiovascular events, improving prognosis in this patient population.
Objective:
To investigate the risk factors and the values of early invasive intervention in patients with acute coronary syndromes (ACS) without ST-segment elevation.
Methods:
Five hundred and forty-five patients of ACS without ST-segment elevation were randomly assigned to an early conservative strategy or early invasive strategy who had been admitted to hospitals consecutively from Oct. 2001 to Oct. 2003. The combined cardiovascular events (a combination of cardiac death, nonfatal myocardial infarction, nonfatal heart failure and re-hospital admission due to recurrent ischemia angina) within 30 days and 6 months were analyzed and the primary high risk factors for combined cardiovascular events were evaluated by means of multivariate logistic regression analysis among baseline clinical characteristics and laboratory data, meanwhile, the effects of an early conservative strategy or early invasive strategy on outcomes were also investigated.
Results:
The incidences of combined cardiovascular events within 30 days and 6 months among 513 cases were 14.0% and 25.7% respectively. Multivariate logistic regression analysis implied ST-segment depression, elevation of troponin I level, increased C-reactive protein, lower ejection fraction of left ventricular and higher TIMI risk scores were all associated with an increases in cardiovascular events within 6 months, and they were respectively independent predictive factor for the increases of cardiovascular events. Early invasive strategy was associated with a lower rate of re-hospital admission due to recurrent ischemia angina within 30 days and a decreased incidences of combined cardiovascular events within 30 days and 6 months compared with early conservative strategy (all P < 0.05).
Conclusions:
ST-segment depression, elevation of troponin I level, increased C-reactive protein, lower ejection fraction of left ventricular and higher TIMI risk scores are high risk factors for patients with ACS without ST-segment elevation, and early invasive strategy can have a substantial impact in reducing combined cardiovascular events.
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