Benefit of Early Invasive Therapy in Acute Coronary Syndromes. A Meta-Analysis of Contemporary Randomized Clinical Trials

Anthony A. Bavry, Dharam J. Kumbhani, Andrew N. Rassi, Deepak L. Bhatt, Arman T. Askari

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Abstract

Objectives: This study sought to systematically determine whether early invasive therapy improves survival and reduces adverse cardiovascular events in the management of non-ST-segment elevation acute coronary syndromes. Background: Although early invasive therapy reduces recurrent unstable angina, the magnitude of benefit on other important adverse outcomes is unknown. Methods: Clinical trials that randomized non-ST-segment elevation acute coronary syndrome patients to early invasive therapy versus a more conservative approach were included for analysis. Results: In all there were 7 trials with 8,375 patients available for analysis. At a mean follow-up of 2 years, the incidence of all-cause mortality was 4.9% in the early invasive group, compared with 6.5% in the conservative group (risk ratio [RR] = 0.75, 95% confidence interval [CI] 0.63 to 0.90, p = 0.001), and at 1 month (RR = 0.82, 95% CI 0.50 to 1.34, p = 0.43). At 2 years of follow-up, the incidence of nonfatal myocardial infarction was 7.6% in the invasive group, versus 9.1% in the conservative group (RR = 0.83, 95% CI 0.72 to 0.96, p = 0.012), and at 1 month (RR = 0.93, 95% CI 0.73 to 1.19, p = 0.57). At a mean of 13 months of follow-up, there was a reduction in rehospitalization for unstable angina (RR = 0.69, 95% CI 0.65 to 0.74, p < 0.0001). Conclusions: Managing non-ST-segment elevation acute coronary syndromes by early invasive therapy improves long-term survival and reduces late myocardial infarction and rehospitalization for unstable angina.

Original languageEnglish (US)
Pages (from-to)1319-1325
Number of pages7
JournalJournal of the American College of Cardiology
Volume48
Issue number7
DOIs
StatePublished - Oct 3 2006

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Acute Coronary Syndrome
Secondary Prevention
Meta-Analysis
Randomized Controlled Trials
Odds Ratio
Confidence Intervals
Unstable Angina
Myocardial Infarction
Survival
Incidence
Mortality

ASJC Scopus subject areas

  • Nursing(all)

Cite this

Benefit of Early Invasive Therapy in Acute Coronary Syndromes. A Meta-Analysis of Contemporary Randomized Clinical Trials. / Bavry, Anthony A.; Kumbhani, Dharam J.; Rassi, Andrew N.; Bhatt, Deepak L.; Askari, Arman T.

In: Journal of the American College of Cardiology, Vol. 48, No. 7, 03.10.2006, p. 1319-1325.

Research output: Contribution to journalArticle

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abstract = "Objectives: This study sought to systematically determine whether early invasive therapy improves survival and reduces adverse cardiovascular events in the management of non-ST-segment elevation acute coronary syndromes. Background: Although early invasive therapy reduces recurrent unstable angina, the magnitude of benefit on other important adverse outcomes is unknown. Methods: Clinical trials that randomized non-ST-segment elevation acute coronary syndrome patients to early invasive therapy versus a more conservative approach were included for analysis. Results: In all there were 7 trials with 8,375 patients available for analysis. At a mean follow-up of 2 years, the incidence of all-cause mortality was 4.9{\%} in the early invasive group, compared with 6.5{\%} in the conservative group (risk ratio [RR] = 0.75, 95{\%} confidence interval [CI] 0.63 to 0.90, p = 0.001), and at 1 month (RR = 0.82, 95{\%} CI 0.50 to 1.34, p = 0.43). At 2 years of follow-up, the incidence of nonfatal myocardial infarction was 7.6{\%} in the invasive group, versus 9.1{\%} in the conservative group (RR = 0.83, 95{\%} CI 0.72 to 0.96, p = 0.012), and at 1 month (RR = 0.93, 95{\%} CI 0.73 to 1.19, p = 0.57). At a mean of 13 months of follow-up, there was a reduction in rehospitalization for unstable angina (RR = 0.69, 95{\%} CI 0.65 to 0.74, p < 0.0001). Conclusions: Managing non-ST-segment elevation acute coronary syndromes by early invasive therapy improves long-term survival and reduces late myocardial infarction and rehospitalization for unstable angina.",
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AU - Bhatt, Deepak L.

AU - Askari, Arman T.

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AB - Objectives: This study sought to systematically determine whether early invasive therapy improves survival and reduces adverse cardiovascular events in the management of non-ST-segment elevation acute coronary syndromes. Background: Although early invasive therapy reduces recurrent unstable angina, the magnitude of benefit on other important adverse outcomes is unknown. Methods: Clinical trials that randomized non-ST-segment elevation acute coronary syndrome patients to early invasive therapy versus a more conservative approach were included for analysis. Results: In all there were 7 trials with 8,375 patients available for analysis. At a mean follow-up of 2 years, the incidence of all-cause mortality was 4.9% in the early invasive group, compared with 6.5% in the conservative group (risk ratio [RR] = 0.75, 95% confidence interval [CI] 0.63 to 0.90, p = 0.001), and at 1 month (RR = 0.82, 95% CI 0.50 to 1.34, p = 0.43). At 2 years of follow-up, the incidence of nonfatal myocardial infarction was 7.6% in the invasive group, versus 9.1% in the conservative group (RR = 0.83, 95% CI 0.72 to 0.96, p = 0.012), and at 1 month (RR = 0.93, 95% CI 0.73 to 1.19, p = 0.57). At a mean of 13 months of follow-up, there was a reduction in rehospitalization for unstable angina (RR = 0.69, 95% CI 0.65 to 0.74, p < 0.0001). Conclusions: Managing non-ST-segment elevation acute coronary syndromes by early invasive therapy improves long-term survival and reduces late myocardial infarction and rehospitalization for unstable angina.

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