This multinational registry (3 USA, 2 European centers) will capture in the ED continuous non invasive hemodynamic monitoring (using Nexfin finger cuff technology) of patients presenting with acute heart failure, stroke syndromes and systemic infection. Patients will be observed after their Emergency Department (ED) disposition to determine clinical outcomes (length of stay in the hospital, the development of any organ dysfunction, mortality and need for unscheduled medical care within the ensuing 30 days). It is anticipated that specific ED hemodynamic profiles will be predictive of better clinical outcomes than others. This information will provide the outcome data needed to design future therapeutic trials that will evaluate the effect of ED hemodynamic manipulations on overall patient management and outcomes.