Key result
Left dominant coronary circulation increased mortality risk compared to right dominant circulation in patients with acute coronary syndrome (OR 1.27; 95% CI 1.13-1.42; P<0.0001).
Why the study?
Does left dominant coronary circulation increase mortality in patients with acute coronary syndrome compared to right dominant circulation?
Meta-Analysis (n=255,718)
Does left dominant coronary circulation increase mortality in patients with acute coronary syndrome compared to right dominant circulation?
Answers are grounded in this paper and cite their sources.
Left dominant coronary circulation is associated with a significantly increased risk of short- and long-term mortality in patients with acute coronary syndrome, serving as a potential incremental prognostic factor.
BACKGROUND: The effect of coronary dominance on mortality in patients with acute coronary syndrome (ACS) remains unclear. We performed a meta-analysis to evaluate the effect of coronary dominance in patients with ACS. METHODS: Several data sources were searched for studies which compared studies that compared outcomes between right and left dominant coronary circulation in patients with ACS. The measured outcomes were in-hospital, 30-day or long-term mortality as reported in individual studies. The Generic inverse variance method was used in a random-effects model to pool mortality as an outcome. Odds ratio (OR) was calculated for mortality in the left dominant circulation relative to a right dominant one. Sub-group analysis was performed after stratification of mortality by duration. RESULTS: A total of 5 studies with 8 comparisons and 255,718 participants revealed an increased risk mortality (OR = 1.27 (95% CI: 1.13 - 1.42; P < 0.0001; I(2) = 34%). Sub-group analysis revealed that the increased risk was evident at all time periods after the ACS; in-hospital (OR = 1.37; 95% CI: 1.07 - 1.76; P = 0.01; I(2) = 50%), at 30 days (OR = 1.69; 95% CI: 1.14 - 2.52; P = 0.009; I(2) = 18%) and long-term (OR = 1.15; 95% CI: 1.03 - 1.28; P = 0.01; I(2) = 0%). CONCLUSIONS: In this meta-analysis we found that there is an increased risk of mortality with LD coronary circulation in patients with ACS. The knowledge of coronary dominance may not only be helpful as an incremental prognostic factor beyond pre-procedural risk scores in all patients with ACS, but may also aid in clinical decision making in a subset of these patients.
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Khan et al. (2015) conducted a meta-analysis in Acute coronary syndrome (n=255,718). Left dominant coronary circulation vs. Right dominant coronary circulation was evaluated on Mortality (OR 1.27, 95% CI 1.13 - 1.42, p=< 0.0001). Left dominant coronary circulation increased mortality risk compared to right dominant circulation in patients with acute coronary syndrome (OR 1.27; 95% CI 1.13-1.42; P<0.0001).
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