News
Mitchel L. Zoler/Frontline Medical News
Dr. William T. Abraham
“U.S. guidelines have tended to stay away from areas where there are no evidence-based data. To their credit, the Europeans will take on something like acute heart failure where we don’t have an adequate evidence base. Despite that, they provide guidelines, which is important because clinicians need guidance even when the evidence is not very good, when the guideline is based mostly on experience and expert consensus.” commented Dr. William T. Abraham, professor and director of cardiovascular medicine at the Ohio State University Wexner Medical Center in Columbus.
“It’s absolutely appropriate to think of acute heart failure as an emergency situation. We know from high-sensitivity troponin assays that troponin levels are increased in 90% of patients who present with acute decompensated heart failure. So most acute heart failure patients are losing heart muscle cells and we should treat them like we treat acute coronary syndrome. Time matters in acute heart failure; time is heart muscle. Treatment needs to break the hemodynamic and neurohormonal storm of acute decompensated heart failure; get the patient stabilized; improve vital organ perfusion, including within the heart; and shift the myocardial oxygen supply and demand equation so myocardial necrosis stops. All of this is important, and study results suggest it’s the correct approach. I’m not sure study results prove it, but studies that have looked at the time course of treatment for acute heart failure showed that early initiation of treatment – within the first 6 hours of onset – compared with 12-24 hours of onset makes a difference in outcomes,” Dr. Abraham said in an interview.
But a major limitation to the potential efficacy of a rapidly initiated management strategy is that few interventions currently exist with proven benefits for acute heart failure patients.
For the time being, rapid intervention means using diuretics relatively quickly and, if there is an indication for treating with a vasoactive medication, using that quickly too. “The rapid approach is really more relevant to the future; it’s relevant to the design of future acute heart failure treatment trials. That is where this early treatment paradigm is important,” as it could potentially apply to new, more effective treatments of the future rather than to the marginally effective treatments now available, Dr. Abraham said.
“For a long we time haven’t pushed how quickly we should act when implementing guideline-directed treatment” for patients with acute heart failure, noted Dr. Mehra. “The CHAMP approach is interesting, and the ESC guidelines are a very interesting move in the direction” of faster action. “They speak to the period of time during which one should act. Hopefully this will help the science of acute decompensated heart failure move forward.”
But for other U.S. experts the issue again pivots on the lack of evidence.
“There is nothing new” about managing acute heart failure, said Dr. Jessup. “The ESC guideline was articulated very well; they made their recommendations very clear. But a lot is consensus driven. There are no new data. The problem with acute heart failure is that the recommendations are what we think clinicians should do. CHAMP is a nice acronym; it’s packaged better, but there are not any new data.”
Comorbidities
A dramatic contrast distinguishes the extent to which the ESC guidelines highlight comorbidities, compared with prevailing U.S. guidelines. The new ESC guidelines highlight and discuss with some detail 16 distinct comorbidities for clinicians to keep in mind when managing heart failure patients, compared with three comorbidities (atrial fibrillation, anemia, and depression) discussed with similar detail in the 2013 U.S. guidelines.
Mitchel L. Zoler/Frontline Medical News
Dr. Stefan D. Anker
“We are targeting comorbidities to personalize medicine, by subgrouping [heart failure] patients into groups that need to receive special attention,” explained Dr. Stefan D. Anker, a coauthor on the ESC guidelines. “We care about comorbidities because they make the diagnosis of heart failure difficult. They aggravate symptoms and contribute to additional hospitalizations. They interfere with [heart failure] treatment, and because comorbidities have led to exclusions of heart failure patients from trials, we lack evidence of treatment efficacy in patients with certain comorbidities,” said Dr. Anker, a professor of innovative clinical trials at the Medical University in Göttingen, Germany.
“The comorbidity discussion in the ESC guidelines is extremely important,” commented Dr. Abraham. “It supports the need for a multidimensional approach to heart failure patients. A cardiologist may not have all the resources to manage all the comorbidities [a heart failure patient might have]. This is why having a sleep medicine specialist, a diabetes specialist, a nephrologist, etc., involved as part of a heart failure management team can be very valuable. We need to involve subspecialists in managing the comorbidities of heart failure because they clearly have an impact on patient outcome.”