Summary on
The prognostic impact of mechanical atrial dysfunction and atrial fibrillation in heart failure with preserved ejection fraction
English summary
Background
Heart failure with preserved ejection fraction (HFpEF) is a condition where the heart pumps normally but doesn’t relax properly. Many HFpEF patients also have atrial fibrillation (AF), an irregular heart rhythm. We investigated whether poor movement of the heart’s upper chambers (atria), called mechanical atrial dysfunction, affects patient outcomes more than AF itself.
What We Did
We studied 258 HFpEF patients, dividing them into three groups:
- No AF: No history of atrial fibrillation (112 patients).
- Paroxysmal AF (PAF): Occasional AF episodes (56 patients).
- Sustained AF (SAF): Continuous or recurring AF (90 patients).
We used advanced imaging and monitoring to measure atrial function and observed patients over time to track health outcomes.
What We Found
- Atrial function worsened as AF stages progressed:
- No AF: 30.5% strain (good atrial function).
- PAF: 22.3% strain.
- SAF: 13.9% strain (poor atrial function).
- Poor atrial function predicted worse outcomes, even more than the presence or severity of AF.
- AF’s negative impact on outcomes was largely explained by reduced atrial function.
Conclusion
Atrial dysfunction is a stronger predictor of poor outcomes in HFpEF than AF alone. This suggests that focusing on improving atrial function might help slow disease progression and improve outcomes for HFpEF patients, with or without AF.