Most common
Atrial fibrillation
The upper chambers quiver instead of squeezing. That raises stroke risk and often leaves people exhausted, short of breath, or off-balance. Treatment can be medication, cardioversion, pulsed field ablation, or a combination — plus a clear plan for anticoagulation.
AFib page →
Often curable
Atrial flutter
A fast but organized circuit in the atrium. Typical flutter has a predictable path, which is why catheter ablation resolves it for the large majority of patients in a single procedure.
Arrhythmia page → Catheter ablation →
Sudden racing
SVT
Episodes that start above the ventricles and can hit without warning. Many SVTs are cured with a targeted ablation, which can mean no lifelong medication.
Arrhythmia page → Catheter ablation →
Needs urgency
Ventricular tachycardia
A fast rhythm from the lower chambers. It can be dangerous. Evaluation may lead to medication, ablation, an ICD, or treatment of the underlying heart muscle problem.
Tachycardia page →
Too slow
Bradycardia & heart block
A pulse that cannot keep up — fatigue, lightheadedness, or fainting. Pacemakers, including leadless and conduction-system pacing, correct the problem directly.
Bradycardia & pacing page →
Capture the event
Palpitations
Skipped, fluttering, or pounding beats. Most are benign. The work is to record the rhythm during a symptom and prove what it is — then decide whether it needs treatment.
Arrhythmia page →
Rule out electrical cause
Syncope
Fainting or near-fainting. Some causes are reflex and harmless; some are electrical and serious. Ambulatory monitoring or an implantable loop recorder often settles it.
How monitors work → Arrhythmia page →
Burden matters
PVCs
Extra ventricular beats are common. A high burden can weaken the heart over time and is worth treating with medication or ablation.
Arrhythmia page → Catheter ablation →