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. 2013 Nov-Dec;42(6):422-7.
doi: 10.1016/j.hrtlng.2013.07.010. Epub 2013 Aug 22.

Arrhythmias in patients with acute coronary syndrome in the first 24 hours of hospitalization

Catherine Winkler  1 , Marjorie Funk, Daniel M Schindler, Jessica Zegre Hemsey, Rachel Lampert, Barbara J Drew
Affiliations

Arrhythmias in patients with acute coronary syndrome in the first 24 hours of hospitalization

Catherine Winkler et al. Heart Lung. 2013 Nov-Dec.

Abstract

Objectives: In patients with acute coronary syndrome (ACS), we sought to: 1) describe arrhythmias during hospitalization, 2) explore the association between arrhythmias and patient outcomes, and 3) explore predictors of the occurrence of arrhythmias.

Methods: In a prospective sub-study of the IMMEDIATE AIM study, we analyzed electrocardiographic (ECG) data from 278 patients with ACS. On emergency department admission, a Holter recorder was attached for continuous 12-lead ECG monitoring.

Results: Approximately 22% of patients had more than 50 premature ventricular contractions (PVCs) per hour. Non-sustained ventricular tachycardia (VT) occurred in 15% of patients. Very few patients (≤ 1%) had a malignant arrhythmia (sustained VT, asystole, torsade de pointes, or ventricular fibrillation). Only more than 50 PVCs/hour independently predicted an increased length of stay (p < .0001). No arrhythmias predicted mortality. Age greater than 65 years and a final diagnosis of acute myocardial infarction independently predicted more than 50 PVCs per hour (p = .0004).

Conclusions: Patients with ACS seem to have fewer serious arrhythmias today, which may have implications for the appropriate use of continuous ECG monitoring.

Keywords: Acute coronary syndrome; Acute myocardial infarction; Alarms; Arrhythmia; Electrocardiogram; Outcomes.

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