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Prognosis and treatment of asymptomatic coronary artery disease
Insights
Prognosis for asymptomatic coronary artery disease varies. Aggressive treatment is suggested for high-risk asymptomatic patients, but prophylactic revascularization remains unresolved due to limited data.
Area of Science:
- Cardiology
- Vascular Medicine
- Preventive Cardiology
Background:
- Limited data exists on the long-term prognosis of asymptomatic individuals with coronary artery disease.
- Existing studies suggest potentially better outcomes for asymptomatic versus symptomatic patients.
- However, certain subgroups, like those with triple-vessel disease, show concerning mortality rates.
Purpose of the Study:
- To review the current understanding of prognosis in asymptomatic coronary artery disease.
- To evaluate the evidence supporting aggressive medical or surgical intervention in high-risk asymptomatic patients.
- To assess the unresolved question of prophylactic revascularization in this population.
Main Methods:
- Review of existing literature on the natural history and prognosis of asymptomatic coronary artery disease.
- Analysis of studies reporting outcomes in patients with conditions like left main and triple-vessel disease.
- Examination of data on surgical interventions and their short-term survival rates.
Main Results:
- Asymptomatic patients may have a better prognosis than symptomatic ones, but this is not universally true.
- Annual mortality rates of 4-5% are reported in asymptomatic patients with triple-vessel disease, especially with prior infarction.
- Surgical treatment series show good short-term survival, but lack of control groups hinders definitive conclusions.
Conclusions:
- The prognosis for asymptomatic coronary artery disease is variable and requires further investigation.
- A more aggressive approach is advocated for asymptomatic patients with left main or triple-vessel disease, particularly post-myocardial infarction.
- The efficacy of prophylactic revascularization in asymptomatic coronary artery disease remains an unresolved issue due to insufficient data on non-operative outcomes.
Abstract:
Despite the large number of studies dealing with the natural history of angiographically defined coronary artery disease, there is still a paucity of data on the prognosis of totally asymptomatic persons. From the small number of reported studies, it appears that prognosis in selected asymptomatic patients may be better than that of symptomatic patients. However, the annual mortality rate in the subgroup of asymptomatic patients with triple vessel disease was as high as 4 to 5% in some studies that included patients with prior myocardial infarction or mild symptoms, or both. This has reinforced the views of those who advocate a more aggressive medical/surgical approach to asymptomatic patients with left main and triple vessel disease, especially if they have had a prior infarction. Although several small series of surgically treated patients have been reported to have excellent short-term survival rates, the absence of adequate control groups in nearly all of these studies has left the issue of prophylactic revascularization unresolved. Until there is more knowledge of prognosis in patients not operated on, it is likely to remain unresolved.