Most people have felt it at least once. A brief flutter. A thump that seems too loud. A moment where your heart skips, races, or feels like it’s doing something it shouldn’t.

Usually, it passes in seconds. You take a breath, carry on, and tell yourself it was probably just caffeine or stress. Sometimes that’s true. But sometimes it isn’t. And the tricky part is that an irregular heartbeat doesn’t always announce itself dramatically.

What an Irregular Heartbeat Actually Feels Like

There is no single sensation. Because the heart’s electrical system is complex, the experience varies from person to person:

  • A fluttering or flapping feeling in the chest
  • A sudden hard thump, as if the heart “caught” itself
  • A racing sensation that starts and stops without warning
  • A feeling that the heart briefly “stopped” and then restarted
  • An unusual awareness of your own heartbeat, especially at rest or when lying down

Some people also notice dizziness, a sudden wave of fatigue, or mild breathlessness alongside these sensations. None of these are unique to heart rhythm issues, which is exactly why they deserve proper clinical evaluation rather than reassurance based on guesswork.

Common Types of Arrhythmia

The umbrella term for irregular heart rhythms is arrhythmia. While many sensations feel similar, they represent different electrical patterns within the heart. Some of the more common types we assess for include:

Atrial Fibrillation (AF)

An irregular, often rapid rhythm originating in the upper chambers. One of the most common arrhythmias in adults over 40, and a significant contributor to stroke risk if unmanaged.

Supraventricular Tachycardia (SVT)

Episodes of a very fast but regular heart rate that begin and end suddenly. Often feels like a sudden "racing" that lasts minutes to hours.

Ectopic Beats (PACs/PVCs)

Extra or premature beats that cause that classic "skipped beat" or "thud" sensation. Very common and often benign but worth confirming via clinical audit.

Atrial Flutter

A rapid but more regular abnormal rhythm, related to AF but distinct in its pattern. Usually requires specific electrical mapping to manage correctly.

Knowing which type you have matters, because management differs significantly between them. Establishing an electrical baseline is the only way to move from guesswork to certainty.

The Risk Myth: "I'm Too Healthy for This"

One of the most common misconceptions is that you need high blood pressure or established heart disease to experience an arrhythmia. In reality, irregular rhythms occur in people with no diagnosed chronic conditions whatsoever.

Recognising and addressing triggers is often the first step in management. Common clinical triggers include:

Poor or Disrupted Sleep High Stress / Elevated Cortisol Excess Caffeine or Alcohol Dehydration Thyroid Dysfunction Viral Recovery (Post-COVID) Stimulant Medications / Supplements

Identifying these factors is essential, especially for benign rhythm disturbances where environmental management can significantly improve your quality of life.

Why It’s Easy to Miss

An irregular heartbeat is often intermittent. It may not occur during the brief, ten-second window of a standard ECG, which is why a routine check can come back "normal" even when a problem exists.

The Diagnostic Snapshot: For this reason, extended monitoring, such as a Holter monitor worn over 24 to 48 hours, is often essential for capturing what a single snapshot misses. If you've experienced symptoms, even briefly, that history is clinically relevant regardless of prior test results.

⚠️ When to Seek Immediate Care

Most palpitations are not medical emergencies. However, seek care immediately if you experience:

  • Chest pain or pressure alongside the palpitations
  • Fainting or near-fainting (Syncope)
  • Sudden, severe shortness of breath
  • A racing heart that does not settle after several minutes
  • Palpitations following a recent heart attack or known heart condition

For any new, persistent, or unusual sensations that do not require immediate emergency care, a non-urgent clinical evaluation is the right first step. Identifying the rhythm early allows for management while it is still a functional issue, rather than waiting for a structural event.

“ The patients who concern me most aren’t the ones who come in worried; It’s the ones who felt something, waited to see if it went away, and came in a year later. If your heart is doing something unusual, that’s worth one conversation.

Dr Gerald Thang
Dr. Gerald Thang
Principal Physician

Establish Your Electrical Baseline.

Noticed something unusual with your heartbeat? An ECG can be performed on the same visit.

Book a Cardiac Evaluation

Frequently Asked Questions

Can stress really cause a permanent heart rhythm issue?

Stress triggers cortisol and adrenaline, which can irritate the heart's electrical pathways. While often temporary, chronic stress can lead to persistent rhythm changes that require medical management to prevent long-term damage.

Should I wait for the 'flutter' to happen before booking?

No. Because arrhythmias are often intermittent, we use technology that tracks your heart over 24-48 hours. We don't need to catch it in the office; we just need to start the monitoring process.

Intellectual Property Notice: The Clinical Stewardship protocols and Diagnostic Frameworks are the intellectual property of A Healing Heart Medical Clinic and Dr. Gerald Thang.