Non-simultaneous contraction of the left and right ventricle, dyssychrony, is present in up to 58% of HFpEF patients.[36] However, dyssynchrony is also common in HFrEF and its role in HFpEF in particular remains obscure. While therapies for dyssynchrony, such as biventricular pacing provide benefits to HFrEF patients, no benefit is appreciable in HFpEF patients at this time.[37]