These can be divided into a “classic” group of symptoms that are highly (though not exclusively) indicative of cardiac arrhythmia and an “other” group of symptoms that are just as likely to be caused by an arrhythmia as something else.
But many times, much to patients’ surprise, cardiac arrhythmias may not produce any symptoms at all. This is especially true for arrhythmias that produce intermittent “extra” heartbeats—namely, premature atrial complexes (PACs) and premature ventricular complexes (PVCs).
Classic Symptoms
When a patient presents with classic symptoms, a healthcare provider should look specifically for a cardiac arrhythmia as the cause.
These classic symptoms include:
PalpitationsLightheadednessSyncopeCardiac arrest
While there could be another cause to blame, arrhythmia is likely.
Palpitations
Palpitations are an unusual awareness of the heartbeat. They are commonly experienced as disturbing skips or pauses, intermittent heartbeats that feel too strong or pounding, episodes of rapid or “runaway” heartbeats, or heartbeats that are perceived to be irregular instead of steady.
Palpitations affect different people in different ways. Some people don’t find them particularly bothersome, while others find them extremely distressing and frightening.
Lightheadedness
If a cardiac arrhythmia is preventing the heart from pumping blood sufficiently to provide the body’s needs, episodes of lightheadedness may result.
When an arrhythmia is producing lightheadedness, it is more likely to do so when you are upright, or when you are doing something active. Resting or lying down tends to improve this symptom.
Because lightheadedness may be a sign of a potentially dangerous problem like syncope or cardiac arrest, this is a symptom that should always be evaluated by a healthcare provider.
Syncope
Syncope, or transient loss of consciousness, is a fairly common problem that (like lightheadedness) has numerous potential causes, many of which are pretty benign.
But when syncope is caused by a cardiac arrhythmia, that’s a good sign that the arrhythmia itself is quite dangerous. It usually means that the arrhythmia is preventing the brain from receiving enough oxygen to maintain consciousness.
Episodes of syncope can result from either bradycardia (if the heart rate is slow enough) or tachycardia (if the heart rate is fast enough).
For this reason, an episode of unexplained syncope always requires a full medical evaluation to pinpoint the underlying cause.
Any arrhythmia that has caused syncope should be considered potentially life-threatening and should be treated aggressively.
Cardiac Arrest
A cardiac arrest occurs when the heart stops beating. Although there may be other causes for this, the main consideration is the function of the electrical activity of the heart and the heart’s rhythm.
While severe bradycardia may cause a cardiac arrest, most often this condition is produced by ventricular fibrillation or ventricular tachycardia.
Cardiac arrest invariably leads to rapid death (and is the main cause of sudden death) unless either the arrhythmia terminates by itself or effective cardiopulmonary resuscitation is administered within a very few minutes.
Most of these people will be strong candidates for an implantable defibrillator.
Other Symptoms
In addition to these classic symptoms, cardiac arrhythmias may also produce several less specific symptoms that may not necessarily point a healthcare provider toward considering an arrhythmia as the cause.
Most of these “other” symptoms are related to an arrhythmia causing a relative reduction in the ability of the heart to pump blood to the body’s organs.
These symptoms are more likely to occur when a person is upright or exerting themself and in people who have other medical conditions in addition to the arrhythmia, such as heart failure, diabetes, lung problems, or coronary artery disease.
These symptoms include:
Fatigue Dyspnea (shortness of breath) Poor exercise tolerance Generalized weakness Confusion Chest pain
When to See a Healthcare Provider
Any of these symptoms should prompt a visit to the healthcare provider. An episode of severe lightheadedness or unexplained syncope should be evaluated immediately and warrants a call to 911.
While many cardiac arrhythmias are fairly common and usually benign, others are dangerous and need to be treated. This means it is important for your healthcare provider to identify whether an arrhythmia is producing your symptoms, and if so, which specific arrhythmia is causing the problem and how aggressive it should be treated.
There was an error. Please try again.
