Chronic Diastolic Heart Failure (Heart Failure with Preserved Ejection Fraction - HFpEF)

Introduction

Chronic diastolic heart failure, now commonly referred to as heart failure with preserved ejection fraction (HFpEF), is a condition in which the heart muscle contracts normally but has difficulty relaxing and filling with blood. Unlike systolic heart failure, where the heart's pumping function is impaired, HFpEF is primarily a disorder of diastolic dysfunction.

Causes and Risk Factors

HFpEF is often associated with conditions that lead to stiffening of the heart muscle, including: - Hypertension (high blood pressure) – Chronic high blood pressure leads to thickening of the heart muscle (left ventricular hypertrophy), which reduces its ability to relax properly. - Aging – As people age, the heart muscle naturally becomes stiffer. - Diabetes – High blood sugar contributes to structural and functional changes in the heart. - Obesity – Excess fat can lead to inflammation and increased workload on the heart. - Coronary artery disease – Reduced blood supply can damage heart tissues. - Kidney disease – Fluid overload can worsen heart failure symptoms. - Atrial fibrillation – This irregular heart rhythm can worsen diastolic dysfunction.

Symptoms

Though it may develop gradually, HFpEF can cause significant symptoms, including: - Shortness of breath (especially during exertion or at night while lying down) - Fatigue and weakness - Swelling in the legs, ankles, or abdomen - Rapid or irregular heartbeat - Difficulty exercising

Diagnosis

The diagnosis of HFpEF typically involves: 1. Medical history and physical examination – Assessing risk factors and symptoms. 2. Echocardiogram – Key imaging test to assess heart function and confirm preserved ejection fraction (>50%). 3. BNP (B-type natriuretic peptide) test – Elevated levels suggest heart failure. 4. ECG (Electrocardiogram) – Identifies heart rhythm abnormalities. 5. Cardiac MRI – Provides detailed imaging of heart structure when needed. 6. Stress test or Cardiac catheterization – Sometimes used to assess coronary artery disease or exercise capacity.

Treatment

While no single medication has proven effective in reversing HFpEF, treatment focuses on managing symptoms and underlying causes:

1. Lifestyle Modifications

  • Maintain optimal blood pressure.
  • Adopt a heart-healthy diet (low sodium, low-fat, high-fiber foods).
  • Engage in regular moderate-intensity exercise.
  • Manage weight and diabetes.
  • Avoid excessive alcohol and smoking.

2. Medications

  • Diuretics – Reduce fluid overload and relieve congestion.
  • Mineralocorticoid receptor antagonists (e.g., spironolactone) – May provide some benefits.
  • SGLT2 inhibitors (e.g., empagliflozin, dapagliflozin) – Show promise in improving outcomes.
  • Beta-blockers, ACE inhibitors, or ARBs – Used for blood pressure control and overall cardiovascular protection.

3. Managing Comorbidities

Controlling conditions like hypertension, diabetes, and atrial fibrillation is crucial in HFpEF management.

Prognosis

HFpEF is a chronic condition that requires lifelong management. Early diagnosis and proper treatment can significantly improve quality of life and reduce hospitalizations.

Conclusion

HFpEF is a complex and growing health concern. Recognition of symptoms, early diagnosis, risk factor management, and appropriate treatment strategies are fundamental to improving patient outcomes.

Source recommendations

1. 2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure

  1. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001063
  2. https://pubmed.ncbi.nlm.nih.gov/35363499/
  3. https://www.sciencedirect.com/science/article/pii/S0735109721083959
  4. https://pubmed.ncbi.nlm.nih.gov/35378257/
  5. https://professional.heart.org/en/science-news/2022-guideline-for-the-management-of-heart-failure

2. 2021 ESC Guidelines for the Diagnosis and Treatment of Acute and Chronic Heart Failure

  1. https://pubmed.ncbi.nlm.nih.gov/34447992/
  2. https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines/Acute-and-Chronic-Heart-Failure
  3. https://academic.oup.com/eurheartj/article/42/36/3599/6358045
  4. https://onlinelibrary.wiley.com/doi/full/10.1002/ejhf.2333
  5. https://academic.oup.com/eurheartj/article/44/37/3627/7246292

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