Shock is defined as circulatory failure leading to decreased organ perfusion. In a shock state there is an inadequate delivery of oxygenated blood to tissues that results in end-organ dysfunction. Effective resuscitation includes rapid identification and correction of inadequate circulation. the finding of normal hemodynamic parameters (i.e. normal blood pressure) doe not exclude shock itself. In this 15 minute and 46 second video, I will review the management shock - part 2a (Norepinephrine, Epinephrine, Dopamine, Phenylephrine, and Push-Dose Pressors).
Background: Epinephrine (adrenaline) has been used in advanced life support in cardiac arrest since the early 1960s. Despite the routine recommendation for its use, evidence to support administration is less than ideal. Although it is clear from multiple observational studies that epinephrine improves return of spontaneous circulation (ROSC) and short-term survival, most evidence suggests an absence of improvements in survival with good neurologic outcomes. In cardiac arrest we want to take advantage of the alpha effects of epinephrine, including peripheral vasoconstriction, and therefore increasing aortic diastolic pressure, which in turn helps augment coronary and cerebral blood flow. On the other hand, we want to avoid the potentially detrimental beta effects including dysrhythmias, decreased microcirculation, and increased myocardial oxygen demand all of which increase the chances of recurrent cardiac arrest and decreased neurologic recovery. The only two interventions in cardiac arrest that have shown improve survival with good neurologic outcomes continue to be high-quality CPR and early defibrillation. The debate over the utility of epinephrine in OHCA has been ongoing for several years now and many providers are left with the ultimate question of what to do with epinephrine in OHCA....Read More
Background: Epinephrine (adrenaline) remains a central part of management of OHCA in ACLS guidelines. Recent studies (i.e. PARAMEDIC-2) have raised concerns about the efficacy and possible deleterious effects of epinephrine on both overall survival and long-term neurological outcomes. Other observational trials have suggested that there may be a time dependent effect of epinephrine on survival, with earlier timing of epinephrine improving outcomes, and later timing of epinephrine causing deleterious effects. This trial attempts to analyze the association between timing and dose of epinephrine given on survival and neurologic outcomes of patients with OHCA....Read More
The newly published 2015 AHA guidelines recommend that:
“In IHCA, the combination of Vasopressin, Epinephrine, and Methylprednisolone and post-arrest Hydrocortisone as described by Mentzelopoulos et al. maybe considered; however, further studies are needed before recommending the routine use of this strategy (Class IIb, LOE C-LD)”
Mentzelopoulos et al.  have published two separate randomized, double-blind, placebo-controlled studies out of Greece examining the role of this Vasopressin, Steroid, and Epinephrine (VSE) cocktail. These studies looked at in-hospital cardiac arrest for patients and enrolled patients immediately with non-shockable rhythms or patients in refractory VFib/VTach. The first study included 100 patients from a single center, while the second study included 268 patients from multiple centers....Read More
Advanced Cardiac Life Support (ACLS) provides a well structured framework for those who resuscitate infrequently. There is room to move beyond the algorithm to potentially provide better care for our patients for those who resuscitate frequently. I will describe some tweaks to the way CPR, defibrillation, and medications are delivered in the arrests I manage....Read More