Recognizing the Signs of HFpEF and Atrial Fibrillation

Heart Failure with Preserved Ejection Fraction (HFpEF) and Atrial Fibrillation (AF) often develop gradually and share many of the same symptoms. Because they frequently occur together, distinguishing between the two conditions can be challenging, and many patients experience symptoms from both.

Early recognition and proper diagnosis are important because treatment may improve symptoms, reduce hospitalizations, and improve quality of life.

Common Symptoms of HFpEF

HFpEF occurs when the heart muscle becomes stiff and cannot relax normally, making it more difficult for the heart to fill with blood between beats.

Common symptoms include:

• Shortness of breath, especially during activity

• Fatigue or lack of energy

• Reduced exercise capacity

• Difficulty climbing stairs or walking long distances

• Swelling of the ankles, feet, or legs

• Rapid weight gain from fluid retention

• Difficulty lying flat due to shortness of breath

• Frequent nighttime urination

• Persistent cough or chest congestion

Many patients notice that everyday activities become more difficult over time.

Common Symptoms of Atrial Fibrillation

Atrial fibrillation is an irregular heart rhythm that disrupts the normal coordinated contraction of the atria.

Symptoms may include:

• Palpitations or a racing heartbeat

• Irregular pulse

• Fatigue

• Shortness of breath

• Dizziness or lightheadedness

• Reduced exercise tolerance

• Chest discomfort

• Anxiety or a feeling that the heart is "fluttering"

Some people experience no symptoms at all and learn they have AF during a routine examination.

When HFpEF and AF Occur Together

When HFpEF and AF coexist, symptoms often become more severe because the heart loses both efficient filling and coordinated atrial contraction.

Patients may experience:

• Increased shortness of breath

• Markedly reduced exercise capacity

• Worsening fatigue

• Recurrent hospitalizations

• Fluid retention

• Episodes of rapid heart rate

• Declining quality of life

Many physicians now recognize that HFpEF and AF often interact as a single disease process rather than two unrelated conditions.

How HFpEF Is Diagnosed

There is no single test that confirms HFpEF. Instead, physicians combine symptoms, physical examination findings, imaging studies, and laboratory testing.

Common tests include:

• Echocardiogram (heart ultrasound)

• Electrocardiogram (ECG)

• Blood tests, including BNP or NT-proBNP

• Chest X-ray

• Exercise stress testing

• Cardiac MRI in selected patients

• Cardiac catheterization in complex cases

The echocardiogram is particularly important because it measures heart structure, filling pressures, and ejection fraction.

How Atrial Fibrillation Is Diagnosed

AF is usually diagnosed by recording the heart's electrical activity.

Tests may include:

• Electrocardiogram (ECG)

• Holter monitor

• Event monitor

• Wearable heart rhythm monitors

• Implantable cardiac monitors

• Smartwatch or mobile ECG devices in selected patients

Some episodes occur only intermittently, making longer-term monitoring necessary.

Why Early Diagnosis Matters

HFpEF and atrial fibrillation often progress over time if left untreated. Early diagnosis allows patients and their healthcare providers to address contributing conditions such as hypertension, obesity, diabetes, sleep apnea, and coronary artery disease while considering therapies that may improve symptoms and reduce future complications.

If you experience persistent shortness of breath, unexplained fatigue, exercise intolerance, swelling, or an irregular heartbeat, discuss these symptoms with your healthcare provider.

A Note About Symptoms

Many symptoms of HFpEF and atrial fibrillation overlap with other medical conditions. Only a qualified healthcare professional can determine the underlying cause and recommend appropriate evaluation and treatment.

This information is intended for educational purposes and should not replace professional medical advice.