Shortness of Breath & Heart Health: What Your Heart Doctor Wants You to Know

When Feeling Short of Breath Could Be a Sign of a Heart Problem

Feeling short of breath after climbing several flights of stairs or completing intense exercise can be normal.

But what if you become short of breath while walking a short distance, doing everyday activities, or even while resting?

Shortness of breath, also called dyspnea, can have many possible causes. While lung conditions are often associated with breathing difficulties, your heart can also play an important role.

In some cases, shortness of breath may be one of the first signs that the heart is not functioning as efficiently as it should.

At Athens Heart Center, understanding the cause of shortness of breath is an important part of evaluating your overall cardiovascular health.

How Can Heart Problems Cause Shortness of Breath?

Your heart and lungs work closely together. The heart pumps blood throughout your body, while the lungs add oxygen to the blood and remove carbon dioxide. When the heart cannot pump efficiently, fluid and pressure can build up in ways that affect the lungs and make breathing more difficult.

This can cause symptoms such as:

• Feeling breathless during activity
• Difficulty catching your breath
• Shortness of breath when lying down
• Waking up suddenly feeling short of breath
• Reduced ability to exercise
• Feeling unusually tired during routine activities

Not everyone with shortness of breath has a heart problem, but persistent or unexplained symptoms should be evaluated.

When Is Shortness of Breath Normal?

Temporary shortness of breath can occur for many reasons. For example, you may feel breathless after intense exercise, climbing stairs, running, or heavy physical activity.

Shortness of breath can also become more noticeable when you are out of shape or returning to activity after a long period of inactivity.

However, it is important to pay attention when your breathing changes from what is normal for you. For example, if you previously walked comfortably but now become breathless after walking a short distance, that change deserves attention.

Heart-Related Causes of Shortness of Breath

Several cardiovascular conditions may contribute to breathing difficulties:

Heart Failure

Heart failure occurs when the heart is unable to pump blood as effectively as it should. When blood flow is affected, fluid may accumulate in the lungs or other areas of the body.

Symptoms may include:

• Shortness of breath during activity
• Difficulty breathing while lying flat
• Waking up short of breath
• Swelling in the legs or ankles
• Fatigue and rapid weight gain caused by fluid retention

Heart failure does not mean that the heart has stopped working. It means the heart requires medical evaluation and ongoing management.

Coronary Artery Disease

Coronary artery disease occurs when the arteries that supply blood to the heart become narrowed or blocked. Some people experience chest discomfort, while others may experience shortness of breath as their primary symptom. This can be particularly important to recognize because heart-related symptoms do not always appear as dramatic chest pain.

Heart Rhythm Problems

An abnormal heart rhythm, or arrhythmia, can affect how efficiently the heart pumps blood. Depending on the type of rhythm problem, symptoms may include shortness of breath, heart palpitations, dizziness, fatigue, and lightheadedness. For persistent issues, specialized arrhythmia management and treatment may be recommended.

Some rhythm problems come and go, making them difficult to identify without appropriate cardiac testing.

Heart Valve Problems

Your heart valves help blood move through the heart in the correct direction. When a valve does not open or close properly, the heart may have to work harder. Over time, some valve conditions can contribute to shortness of breath, fatigue, reduced exercise tolerance, swelling, and palpitations.

Cardiomyopathy

Cardiomyopathy refers to diseases that affect the heart muscle. When the heart muscle becomes weakened, thickened, or otherwise altered, it may affect the heart's ability to pump blood efficiently. A cardiovascular evaluation can help determine whether heart muscle problems may be contributing to your symptoms.

Shortness of Breath Is Not Always Caused by the Heart

Breathing difficulties can also be caused by conditions unrelated to the heart. Possible causes include:

• Asthma
• Chronic obstructive pulmonary disease (COPD)
• Respiratory infections
• Anemia
• Anxiety
• Obesity
• Physical deconditioning

This is why it is important not to assume that shortness of breath has one specific cause. Scheduling an initial checkup with your primary care provider or a cardiologist can help identify what is contributing to your symptoms.

Warning Signs You Should Not Ignore

Shortness of breath becomes more concerning when it is new, worsening, or accompanied by other symptoms. Pay particular attention if you experience shortness of breath along with:

• Chest pain or pressure
• Heart palpitations
• Dizziness or fainting
• Swelling in the legs or ankles
• Unusual fatigue
• Difficulty breathing while lying down
• Sudden changes in exercise tolerance

When Is Shortness of Breath an Emergency?

Seek emergency medical attention immediately if you experience sudden or severe shortness of breath, especially when accompanied by:

• Chest pain or pressure
• Fainting or loss of consciousness
• Severe dizziness or confusion
• Blue or gray lips or skin
• Severe weakness

If you believe you may be experiencing a heart attack or another medical emergency, call 911 immediately. Do not wait to see whether the symptoms improve.

How Does a Heart Doctor Evaluate Shortness of Breath?

Because shortness of breath has many potential causes, your healthcare provider will begin by understanding your symptoms and medical history. Your doctor may ask about when symptoms began, whether they occur during rest or activity, if you can lie flat comfortably, and review your overall cardiovascular risk factors.

Tests Your Heart Doctor May Recommend

Depending on your symptoms, your cardiologist may recommend routine diagnostic testing, including:

• Electrocardiogram (EKG): Records the electrical activity of the heart to identify rhythm abnormalities.
• Echocardiogram: Uses ultrasound to evaluate heart structure, muscle function, heart valves, and blood flow.
• Cardiac Stress Testing: Evaluates how your heart responds to physical activity or stress to check for coronary artery disease.
• Heart Rhythm Monitoring: Holter or patch monitors used to capture intermittent heart rhythm issues.
• Blood Tests: Helps identify anemia, thyroid problems, and other metabolic contributors.

Why Your Exercise Tolerance Matters

One of the most important questions your doctor may ask is: "What can you do now that you could do comfortably before?"

Changes in exercise tolerance—such as being unable to walk the same distance or becoming winded by routine housework—provide valuable clues about your heart and overall health.

What Can You Do If You Notice Shortness of Breath?

Start by paying attention to your symptoms and keeping track of when shortness of breath occurs, what triggers it, and how long it lasts. Do not try to diagnose yourself based on symptoms alone. If the breathing difficulty is persistent, worsening, or unexplained, schedule a medical evaluation.

Can Lifestyle Changes Help?

Lifestyle changes may support overall cardiovascular and respiratory health. Your provider may recommend regular physical activity, maintaining a healthy weight, managing blood pressure and cholesterol, avoiding tobacco, following a heart-healthy diet, and managing chronic health conditions. However, lifestyle changes should not replace a medical evaluation.

A Simple Self-Assessment

Ask yourself:

• Is my shortness of breath new or getting worse over time?
• Does it happen during activities that previously did not cause breathing problems?
• Do I feel breathless while resting or lying flat?
• Do I have chest discomfort, palpitations, or leg swelling?
• Has my ability to exercise changed?

If you answered yes to one or more of these questions, it may be worth discussing your symptoms with a healthcare professional.

Frequently Asked Questions

The Bottom Line

Shortness of breath is not always a sign of heart disease, but it is also not a symptom you should ignore when it is new, persistent, or getting worse.

Your heart plays an essential role in delivering oxygen-rich blood throughout your body. When heart function is affected, shortness of breath may be one of the symptoms you notice.

If everyday activities are suddenly making you breathless, you are experiencing unexplained symptoms, or your shortness of breath occurs alongside chest discomfort, palpitations, dizziness, or swelling, a medical evaluation can help identify the cause.

Get Your Symptoms Evaluated at Athens Heart Center

At Athens Heart Center, our specialized cardiology team provides comprehensive evaluations for symptoms that may be related to heart health, including unexplained shortness of breath.

Through appropriate cardiac testing and individualized care, we can help determine whether your symptoms may be connected to a heart condition and recommend the next steps based on your needs.

Don't let unexplained shortness of breath affect your daily life.

Schedule an appointment with Athens Heart Center to better understand what your symptoms may be telling you.