A low-risk Canadian Syncope Risk Score plus 2 hours of ECG monitoring in the ED was able to identify 99.8% of patients at low risk for 30-day serious arrhythmic outcome.
Individual risk factors associated with the development of severe alcohol withdrawal syndrome (SAWS) included a history of delirium tremens and baseline BP ≥ 140mmHg but no individual symptoms or signs associated with exclusion of SAWS. Composite measures fared better, such as the Prediction of Alcohol Withdrawal Severity Scale; a score ≥ 4 had a LR of 174 (95% CI 43-696).
In the evaluation of older patients with syncope, certain ECG abnormalities increase the risk of 30-day serious cardiac arrhythmias. These ECG abnormalities include non-sinus rhythm; multiple premature ventricular conductions; short PR interval; first degree atrioventricular block; complete left bundle branch block; and ST, T, and Q-wave abnormalities consistent with acute or chronic ischemia.