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Does intensive medical therapy influence the outcome in unstable angina?
Insights
Conservative management of unstable angina showed comparable outcomes to intensive medical treatments. Factors like persistent pain, prior angina, and age impacted prognosis, questioning routine beta-blocker and calcium antagonist use.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Unstable angina requires careful management to improve patient outcomes.
- Current treatment protocols often involve intensive medical therapy, including beta-blockers and calcium antagonists.
Purpose of the Study:
- To evaluate the prognosis of patients with unstable angina managed conservatively.
- To identify factors influencing immediate and long-term outcomes in unstable angina.
- To question the routine use of beta-blockers and calcium antagonists in unstable angina management.
Main Methods:
- Retrospective study of 346 patients admitted with documented unstable angina.
- Conservative management approach, avoiding routine beta-blockers and calcium antagonists.
- Analysis of factors affecting short-term (28-day) and long-term (1-year) prognosis.
Main Results:
- 28-day mortality was 3.2% and nonfatal myocardial infarction rate was 10.1%.
- 1-year coronary mortality was 10.5% and nonfatal infarction rate was 13.1%.
- Persistent pain, prior chronic angina, and older age were associated with adverse outcomes. Beta-blocker/calcium antagonist use in persistent pain >5 days did not alter outcomes.
Conclusions:
- Conservative management of unstable angina yielded acceptable short- and long-term results.
- Patient factors like pain persistence, history of angina, and age are crucial prognostic indicators.
- The routine use of beta-blockers and calcium antagonists in unstable angina may not be universally beneficial and warrants further investigation.
Abstract:
Three hundred and forty-six patients of all ages and both sexes were admitted to coronary care with documented unstable angina. Management was conservative, without the routine use of beta-blockers or calcium antagonists. Mortality was 3.2%, and the nonfatal myocardial infarction rate was 10.1% during the first 28 days. After one year, coronary mortality was 10.5% with a nonfatal infarction rate of 13.1%. Twenty-six patients were subjected to coronary artery bypass surgery, eleven during the first 28 days and fifteen subsequently. No patient underwent coronary angioplasty. The factors influencing immediate and long-term prognosis in these patients were studied. Persistence of pain in hospital, previous chronic angina, and age had an adverse effect on outcome. A total of 143 patients complained of persistent pain lasting for 24 hours or more. The use of beta blockers or calcium antagonists in patients with persistent pain exceeding five days did not appear to influence outcome. The current widespread adherence to "intensive medical treatment," including the routine use of beta blockers and calcium antagonists, is questioned.