Constipation and Risk of Acute Myocardial Infarction: A Systematic Review and Meta-Analysis of Cohort Studies.

Background and aims: Constipation is commonly seen among patients with cardiovascular diseases and is linked to adverse outcomes. However, the association between constipation and the risk of acute myocardial infarction (AMI) remains conflicting. Therefore, we aimed to conduct a systematic review and meta-analysis to summarize the available data on this topic.

Method: We identified potentially eligible studies from the MEDLINE and EMBASE databases, searching from inception to May 2024, to investigate the association between constipation and the risk of developing AMI. To be included, studies needed to compare incidence of AMI between cohorts with and without constipation. Effect size and 95% confidence intervals (CIs) were combined using the generic inverse variance method. All statistical analyses were performed by Review Manager 5.4.

Results: Our meta-analysis included seven studies that met the eligibility criteria. There were 5,351,976 participants, with a mean age of 57.8 years and 74% were males. We found that patients with constipation had a 14% increased risk of AMI with a pooled risk ratio (RR) of 1.14 (95%CI: 1.08-1.14; I²=85%; p<0.001) compared to those without constipation.

Conclusions: Our study revealed that constipation is associated with a higher risk of AMI. Emphasizing and addressing gastrointestinal health, including constipation, as an important issue is essential for comprehensive cardiovascular care.