Feeds:
Posts
Comments

Posts Tagged ‘criteria for hfpef’

Though all of us are aware, the incidence of heart failure is increasing exponentially and is the leading cause of global disease mortality, what we fail to understand is, we still lack a good definition cardiac failure. 

Defining HF based on EF% is convenient but adds more complexity, and is less scientific too. Still, as of now, we have adopted this. I think, one of the important factors that apparently increased the incidence of HF is the creation of an entity called HFpEF. (Formerly diastolic heart failure)

Thanks to ESC, we have a consensus document, which has defined HFpEF based on functional, morphological, and biochemical features. This is a more refined model from the original Mayo clinic H2FpEF score.

Both are given below.

 

Mayo criteria
The problem with both these criteria is the disproportionate importance given to AF. The knowledge gap here is, AF can be initiated at any degree of increased atrial strain which can independently raise LA mean pressure without persistent elevation of LVEDP. We recognize now, left atrial obesity (fatty atrium)  is a powerful trigger of AF, still, in this situation, an Innocent LV may get blamed with a tag of HFpEF. Likewise, many HFpEF may turn out to be primary  LA dysfunction than LV failure. To make things more confusing(scientific) for diagnosing true HFpPEF, we may soon need to look into LA-EF as well. (LA-HFpEF)

Can we diagnose clinically significant HFpEF, without pulmonary hypertension?


In my understanding, the answer is No.

Looking at the two schemes (Mayo & ESC) one thing is clear. Pulmonary hypertension is the key hemodynamic expression of HFpEF. It could be either resting and persistent or exertional and transient.t is obvious the PH in HFpEF is post-capillary. (The modern term for pulmonary venous HT). Mind you, while PVH is mandatory to diagnose HFpEF, PAH (precapillary ) is also observed in most patients with significant HFpEF. This is the reason TR jet velocity is included as one of the criteria.  (To make things simple, we may need to create a new classification of HFpEF, ie resting vs exertional HFpEF.This is what the diastolic stress testing is all about.)

Final message

It is back to basics & time to dig into the fundamentals, of what exactly we mean by heart failure. Is the elevation of LV filling pressure alone sufficient? Should it happen at rest or at exertion, and whether neuroendocrine activation is necessary? Is RASS activation similar in both HFrEF and HFpEF? Try to find the answer to this. How often does HFpEF fulfill Framingham’s criteria of HF.? ( Löfström et al  ESC Heart Fail. 2019) 

Trying to understand the nuances of HFpEF, I think, we can make a statement,- HFpEF can not be diagnosed without pulmonary hypertension. It makes a lot of sense the P in the H2FpEF  scoring system denotes PH, however, It is assigned only a single point, which needs revision. In fact, there is a strong case to argue and make it an essential criterion.

Paradoxically & curiously HF with reduced ejection fraction (which is the most common form of HF) doesn’t require the presence of PAH to diagnose it. This issue may also be examined.

Reference 

1.How to Diagnose Heart Failure With Preserved Ejection Fraction: The HFA–PEFF Diagnostic Algorithm: A Consensus Recommendation From the Heart Failure Association (HFA) of the European Society of Cardiology (ESC). Eur Heart J 2019;40:3297-3317.

2.Löfström U, Hage C, Savarese G, Donal E, Daubert JC, Lund LH, Linde C. Prognostic impact of Framingham heart failure criteria in heart failure with preserved ejection fraction. ESC Heart Fail. 2019 Aug;6(4):830-839. doi: 10.1002/ehf2.12458. Epub 2019 Jun 17. PMID: 31207140; PMCID: PMC6676283.

Read Full Post »