About 15% of patients who undergo percutaneous coronary intervention for acute ST-segment-elevation myocardial infarction experience door-to-balloon time delays due to nonsystem causes, according to a retrospective registry analysis. The delaying factors, such as intubation resulting from cardiac arrest and informed consent issues, resulted in in-hospital mortality that was six times higher than for patients who underwent PCI without delay, according to the study. African-American patients and those who were older, female or had more comorbidities experienced more nonsystem delays than other patients, researchers found.

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