What Do Lyme Heart Symptoms Feel Like?

What do Lyme heart symptoms feel like? For some patients, the first signs are subtle—such as a racing heartbeat, lightheadedness, or unusual fatigue—while others may notice more sudden or concerning changes.

Lyme disease can affect the heart in ways that are not always immediately recognized. These symptoms may come and go, overlap with other conditions, or feel difficult to describe.

If these symptoms feel familiar but the cause is unclear, you may also wonder “is this Lyme disease or something else?”.

Common Lyme Heart Symptoms

Patients with Lyme-related heart involvement often describe:

Heart palpitations (racing, pounding, or irregular heartbeat)
Lightheadedness or dizziness
Shortness of breath
Chest discomfort or pressure
Fainting or near-fainting episodes
Fatigue that feels disproportionate to activity

These symptoms may vary in intensity and can appear suddenly or fluctuate over time.

What Makes These Symptoms Confusing

Lyme heart symptoms are often difficult to recognize because they can overlap with more common conditions.

Palpitations may be attributed to stress or anxiety
Dizziness may be linked to dehydration or fatigue
Chest discomfort may not appear severe

In some cases, symptoms may improve and then return, adding to the uncertainty.

This fluctuating pattern is common in Lyme disease. Learn more about why Lyme symptoms come and go.

When Lyme Disease Affects the Heart

Lyme disease can involve the heart in a condition known as
Lyme carditis.

This occurs when the infection affects the electrical system of the heart, potentially leading to rhythm disturbances.

While many cases are mild, some can become serious if not recognized early.

When Symptoms May Need Urgent Attention

Some symptoms may require prompt medical evaluation:

Fainting or near-fainting
Persistent or worsening chest discomfort
Shortness of breath at rest
A sensation that the heart is skipping or beating irregularly for prolonged periods

These symptoms do not always indicate Lyme carditis, but they should not be ignored.

Why Pattern Recognition Matters

Lyme heart symptoms are often part of a broader pattern rather than isolated findings.

They may occur alongside:

Fatigue
Neurologic symptoms
Muscle or joint pain

Recognizing how symptoms fit together can help guide a more complete evaluation.

For example, in rare cases, delayed diagnosis has led to serious outcomes. Read about a case of
fatal Lyme carditis despite negative testing.

Clinical Takeaway

Lyme heart symptoms can feel subtle, variable, or difficult to interpret.

Palpitations, dizziness, and fatigue may overlap with other conditions—but when they occur together or follow a tick exposure, further evaluation may be warranted.

Recognizing patterns early can help guide more timely care.

Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.

Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention