The Heart Rhythm Problem That Can Be Mistaken for Anxiety

A racing or pounding heartbeat can be unsettling, especially when it happens unexpectedly. Many people may assume that stress or anxiety is the cause, and sometimes it is. However, recurrent or sudden episodes of a very fast or irregular heartbeat can also be caused by a heart rhythm disorder, known as an arrhythmia. Because the symptoms of some arrhythmias can closely resemble those of anxiety or a panic attack, the underlying heart rhythm problem may sometimes go unnoticed.

Consider a young professional who repeatedly experiences sudden episodes of a very fast heartbeat. The attacks may occur during a stressful meeting, while travelling, or even while sitting quietly at home. Along with the racing heart, there may be breathlessness, dizziness, sweating, chest discomfort or an overwhelming feeling of fear. Because these symptoms resemble anxiety, the possibility of a heart rhythm disorder can sometimes be overlooked.

This is particularly important because some arrhythmias can occur in otherwise young and apparently healthy individuals.

The Heart Can Sometimes “Change Gears” Suddenly

Our heart beats because of precisely coordinated electrical signals. When this electrical system develops an abnormal rhythm, the heart may suddenly begin beating much faster - or occasionally much slower - than normal.

Conditions such as supraventricular tachycardia (SVT), atrial fibrillation, atrial flutter and certain ventricular arrhythmias can cause palpitations and other symptoms that overlap with anxiety.

One useful clue is how the episode begins and ends.

Some arrhythmias, particularly certain types of SVT, can behave like an electrical switch: the heartbeat may suddenly jump from normal to very fast and then return to normal just as abruptly. Anxiety and panic can also cause sudden palpitations, so the pattern alone cannot confirm the cause. Recording the heart rhythm during symptoms can be more useful than trying to distinguish the two based only on how the episode feels.

Episodes may occur without any obvious emotional trigger - even while watching television, resting or sleeping.

When Should Palpitations Raise Concern?

Not every episode of a racing heart indicates a serious heart problem. However, certain features deserve medical attention.

A person should consider medical evaluation if palpitations:

• Begin and end suddenly and repeatedly
• Occur without an obvious trigger
• Are associated with fainting or near-fainting
• Cause significant dizziness or breathlessness
• Occur with chest pain or pressure
• Wake someone from sleep
• Happen during exercise
• Are associated with a family history of sudden cardiac death or inherited rhythm disorders
• Continue to recur despite treatment for presumed anxiety

These features do not necessarily mean that a dangerous condition is present. They simply make it important to establish what rhythm is actually occurring.

When Should You Seek Urgent Medical Attention?

If a racing heartbeat is accompanied by chest pain or pressure, severe breathlessness, fainting, severe dizziness or other significant symptoms, seek urgent medical attention rather than assuming it is anxiety.

The Key Is to Capture the Rhythm

One of the biggest challenges in diagnosing intermittent arrhythmias is that the patient may have a completely normal ECG between episodes.

A routine ECG can sometimes reveal the abnormality, but if the episode is intermittent, longer monitoring may be required. A Holter monitor, event recorder, patch monitor or, in selected cases, an ECG-capable wearable device can help capture the heart rhythm during symptoms.

This is why patients should not be discouraged if their initial ECG is normal. A normal ECG between episodes does not necessarily exclude an intermittent arrhythmia.

Many Rhythm Disorders Are Treatable

The good news is that identifying an arrhythmia often provides a clear path forward.

Depending on the type of rhythm disorder, treatment may include lifestyle modification, medications or procedures. For several arrhythmias, catheter ablation can be an effective treatment. During the procedure, an electrophysiologist identifies the abnormal electrical focus or circuit responsible for the rhythm disturbance and uses controlled energy to treat the targeted area.

The procedure is performed through catheters introduced through blood vessels, usually without open-heart surgery. During the procedure, the electrophysiologist identifies the source or circuit responsible for the abnormal rhythm and treats it using controlled energy.

For a patient who has spent months or years wondering whether the symptoms are “just anxiety,” identifying the actual rhythm can be an important step towards a clear diagnosis and appropriate treatment.

Don't Ignore Anxiety - but Don't Assume Every Palpitation Is Anxiety Either

It is equally important not to swing to the opposite extreme. Anxiety, stress and panic attacks are genuine medical conditions and can certainly cause prominent physical symptoms, including palpitations.

The goal is not to label every episode of anxiety as a heart problem. Rather, it is to recognise when the pattern of symptoms warrants a cardiac evaluation.

A simple question can sometimes be helpful:

“What exactly is my heart doing during the episode?”

Instead of trying to guess whether symptoms are psychological or cardiac, documenting the actual heart rhythm can provide the answer.

Our heartbeat is something we usually take for granted - until it suddenly feels different. When recurrent, unexplained episodes of rapid heartbeat occur, listening carefully to that signal and seeking appropriate medical evaluation can replace fear and uncertainty with a clear diagnosis and, in many cases, an effective treatment.

Your heart does not always speak loudly. Sometimes, it speaks through its rhythm.